This is a list of dinosaur

Dinosaur

Dinosaurs are a diverse group of animals of the clade and superorder Dinosauria. They were the dominant terrestrial vertebrates for over 160 million years, from the late Triassic period until the end of the Cretaceous , when the Cretaceous–Paleogene extinction event led to the extinction of...

s whose remains have been recovered from North America

North America

North America is a continent wholly within the Northern Hemisphere and almost wholly within the Western Hemisphere. It is also considered a northern subcontinent of the Americas...

. North America has a rich dinosaur fossil record with great diversity of dinosaurs. This may not mean the dinosaurs were more diverse or abundant; it may be simply because substantial resources have been devoted to the North American fossil record.

During the Triassic

Triassic

The Triassic is a geologic period and system that extends from about 250 to 200 Mya . As the first period of the Mesozoic Era, the Triassic follows the Permian and is followed by the Jurassic. Both the start and end of the Triassic are marked by major extinction events...

 period, dinosaurs such as Coelophysis

Coelophysis

Coelophysis , meaning "hollow form" in reference to its hollow bones , is one of the earliest known genera of dinosaur...

, Chindesaurus

Chindesaurus

Chindesaurus is a genus of saurischian dinosaur named after Chinde Point , near where the genoholotype specimen was discovered in the Chinle Formation of Petrified Forest National Park, Arizona, by Bryan Small in 1985...

, Gojirasaurus

Gojirasaurus

Gojirasaurus is a dubious genus of dinosaur named after the giant monster movie character Gojira . It was discovered in the Bull Canyon Formation...

, and Tawa

Tawa (dinosaur)

Tawa is a genus of theropod dinosaur from the Late Triassic period. It is estimated to have been 2 m long...

lived in North America. Fossils of Tawa have also been found in South America

South America

South America is a continent situated in the Western Hemisphere, mostly in the Southern Hemisphere, with a relatively small portion in the Northern Hemisphere. The continent is also considered a subcontinent of the Americas. It is bordered on the west by the Pacific Ocean and on the north and east...

, which has important indications about paleogeography. During the Early Jurassic Period

Early Jurassic

The Early Jurassic epoch is the earliest of three epochs of the Jurassic period...

, dinosaurs such as Dilophosaurus

Dilophosaurus

Dilophosaurus was a theropod dinosaur from the Sinemurian stage of the Early Jurassic Period, about 193 million years ago. The first specimens were described in 1954, but it was not until over a decade later that the genus received its current name...

, Anchisaurus

Anchisaurus

Anchisaurus is a genus of basal sauropodomorph, and was an early herbivorous dinosaur. Until recently it was classed as a member of Prosauropoda. The name comes from the Greek αγχι/agkhi...

, Ammosaurus

Ammosaurus

Ammosaurus is a genus of sauropodomorph dinosaur from the Early and Middle Jurassic Period of North America. At 4 meters in length, it was small compared to some other members of its suborder, which included the largest animals ever to walk the Earth...

, Syntarsus

Megapnosaurus

Megapnosaurus was a dinosaur of the theropod family Coelophysidae, formerly called Syntarsus , living during the Early Jurassic. It was renamed by American entomologist Dr. Michael Ivie , Polish Australian Dr...

, and the early thyreophoran Scutellosaurus

Scutellosaurus

Scutellosaurus is a genus of herbivorous dinosaur that lived in North America around 200 to 196 million years ago, in the Early Jurassic times....

lived in North America. The latter is believed to have been the ancestor of all stegosaurs and ankylosaurs. The Middle Jurassic

Middle Jurassic

The Middle Jurassic is the second epoch of the Jurassic Period. It lasted from 176-161 million years ago. In European lithostratigraphy, rocks of this Middle Jurassic age are called the Dogger....

 is the only poorly represented time period in North America, although several Middle Jurassic localities are known from Mexico. Footprints, eggshells, teeth, and fragments of bone representing theropods, sauropods, and ornithopods have been found, but none of them are diagnostic to the genus

Genus

In biology, a genus is a low-level taxonomic rank used in the biological classification of living and fossil organisms, which is an example of definition by genus and differentia...

 level.

The Late Jurassic

Late Jurassic

The Late Jurassic is the third epoch of the Jurassic Period, and it spans the geologic time from 161.2 ± 4.0 to 145.5 ± 4.0 million years ago , which is preserved in Upper Jurassic strata. In European lithostratigraphy, the name "Malm" indicates rocks of Late Jurassic age...

 of North America, however, is the exact opposite of the Middle Jurassic. The Late Jurassic Morrison Formation

Morrison Formation

The Morrison Formation is a distinctive sequence of Late Jurassic sedimentary rock that is found in the western United States, which has been the most fertile source of dinosaur fossils in North America. It is composed of mudstone, sandstone, siltstone and limestone and is light grey, greenish...

 is found in several U.S. states, including Colorado

Colorado

Colorado is a U.S. state that encompasses much of the Rocky Mountains as well as the northeastern portion of the Colorado Plateau and the western edge of the Great Plains...

, Utah

Utah

Utah is a state in the Western United States. It was the 45th state to join the Union, on January 4, 1896. Approximately 80% of Utah's 2,763,885 people live along the Wasatch Front, centering on Salt Lake City. This leaves vast expanses of the state nearly uninhabited, making the population the...

, Wyoming

Wyoming

Wyoming is a state in the mountain region of the Western United States. The western two thirds of the state is covered mostly with the mountain ranges and rangelands in the foothills of the Eastern Rocky Mountains, while the eastern third of the state is high elevation prairie known as the High...

, Montana

Montana

Montana is a state in the Western United States. The western third of Montana contains numerous mountain ranges. Smaller, "island ranges" are found in the central third of the state, for a total of 77 named ranges of the Rocky Mountains. This geographical fact is reflected in the state's name,...

, New Mexico

New Mexico

New Mexico is a state located in the southwest and western regions of the United States. New Mexico is also usually considered one of the Mountain States. With a population density of 16 per square mile, New Mexico is the sixth-most sparsely inhabited U.S...

, Oklahoma

Oklahoma

Oklahoma is a state located in the South Central region of the United States of America. With an estimated 3,751,351 residents as of the 2010 census and a land area of 68,667 square miles , Oklahoma is the 28th most populous and 20th-largest state...

, South Dakota

South Dakota

South Dakota is a state located in the Midwestern region of the United States. It is named after the Lakota and Dakota Sioux American Indian tribes. Once a part of Dakota Territory, South Dakota became a state on November 2, 1889. The state has an area of and an estimated population of just over...

, and Texas

Texas

Texas is the second largest U.S. state by both area and population, and the largest state by area in the contiguous United States.The name, based on the Caddo word "Tejas" meaning "friends" or "allies", was applied by the Spanish to the Caddo themselves and to the region of their settlement in...

. It is notable as being the most fertile single source of dinosaur fossils in the world. The roster of dinosaurs from the Morrison is impressive. Among the theropods, Allosaurus

Allosaurus

Allosaurus is a genus of large theropod dinosaur that lived 155 to 150 million years ago during the late Jurassic period . The name Allosaurus means "different lizard". It is derived from the Greek /allos and /sauros...

, Saurophaganax

Saurophaganax

Saurophaganax is a genus of allosaurid dinosaur from the Morrison Formation of Late Jurassic Oklahoma . Some paleontologists consider it to be a species of Allosaurus...

, Torvosaurus

Torvosaurus

Torvosaurus is a genus of large theropod dinosaur that lived during the Late Jurassic period...

, Ceratosaurus

Ceratosaurus

Ceratosaurus meaning "horned lizard", in reference to the horn on its nose , was a large predatory theropod dinosaur from the Late Jurassic Period , found in the Morrison Formation of North America, in Tanzania and Portugal...

, Coelurus

Coelurus

Coelurus is a genus of coelurosaur dinosaur from the Late Jurassic period . The name means "hollow tail", referring to its hollow tail vertebrae...

, Ornitholestes

Ornitholestes

Ornitholestes was a small theropod dinosaur of the late Jurassic of Western Laurasia . To date, it is known only from a single partial skeleton, and badly crushed skull found at the Bone Cabin Quarry near Medicine Bow, Wyoming, in 1900...

, Tanycolagreus

Tanycolagreus

Tanycolagreus is a genus of coelurid theropod from the Late Jurassic of North America. The holotype is a partial skeleton recovered from the Bone Cabin Quarry West locality, Albany County, Wyoming, from the Morrison Formation...

, Stokesosaurus

Stokesosaurus

Stokesosaurus is a genus of small , early tyrannosaur from the Late Jurassic period of Utah and England. It was named after Utah geologist William Lee Stokes...

, and Marshosaurus

Marshosaurus

Marshosaurus was a genus of medium sized theropod, with a size up to 5 or 6 meters in length and a skull about 60 cm long. It is known from parts of at least three individuals from the Morrison Formation of Utah and Colorado.The holotype is a left ilium, or upper pelvis bone found at the...

are found in the Morrison. An abundance of sauropods has been found there, including Apatosaurus

Apatosaurus

Apatosaurus , also known by the popular but scientifically deprecated synonym Brontosaurus, is a genus of sauropod dinosaur that lived from about 154 to 150 million years ago, during the Jurassic Period . It was one of the largest land animals that ever existed, with an average length of and a...

, Diplodocus

Diplodocus

Diplodocus , or )is a genus of diplodocid sauropod dinosaur whose fossils were first discovered in 1877 by S. W. Williston. The generic name, coined by Othniel Charles Marsh in 1878, is a Neo-Latin term derived from Greek "double" and "beam", in reference to its double-beamed chevron bones...

, Barosaurus

Barosaurus

Barosaurus ; Greek barys/βαρυς meaning 'heavy' and saurus/σαυρος meaning 'lizard', 'heavy lizard') was a giant, long-tailed, long-necked, plant-eating dinosaur closely related to the more familiar Diplodocus...

, Brachiosaurus

Brachiosaurus

Brachiosaurus is a genus of sauropod dinosaur from the Jurassic Morrison Formation of North America. It was first described by Elmer S. Riggs in 1903 from fossils found in the Grand River Canyon of western Colorado, in the United States. Riggs named the dinosaur Brachiosaurus altithorax,...

, Camarasaurus

Camarasaurus

Camarasaurus meaning 'chambered lizard', referring to the hollow chambers in its vertebrae was a genus of quadrupedal, herbivorous dinosaurs. It was the most common of the giant sauropods to be found in North America...

, and Amphicoelias

Amphicoelias

Amphicoelias is a genus of herbivorous sauropod dinosaur that includes what may be the largest dinosaur ever discovered, A. fragillimus. Based on surviving descriptions of a single fossil bone, A. fragillimus may have been the longest known vertebrate at in length, and may have had a mass of up...

, which is possibly the largest known dinosaur ever to exist. Two genera of stegosaurs, Stegosaurus

Stegosaurus

Stegosaurus is a genus of armored stegosaurid dinosaur. They lived during the Late Jurassic period , some 155 to 150 million years ago in what is now western North America. In 2006, a specimen of Stegosaurus was announced from Portugal, showing that they were present in Europe as well...

and Hesperosaurus

Hesperosaurus

Hesperosaurus was a herbivorous dinosaur from the Kimmeridgian to Tithonian epochs of the Jurassic period , whose fossils are found in the state of Wyoming in the United States of America...

, have been found there. Finally, ornithopods found in the Morrison include Dryosaurus

Dryosaurus

Dryosaurus is a genus of an ornithopod dinosaur that lived in the Late Jurassic period. It was an iguanodont . Fossils have been found in the western United States, and were first discovered in the late 19th century...

, Camptosaurus

Camptosaurus

Camptosaurus is a genus of plant-eating, beaked ornithischian dinosaurs of the Late Jurassic period of western North America. The name means 'flexible lizard', ....

, Drinker

Drinker

Drinker was a genus of hypsilophodont dinosaur from the late Jurassic period of North America. Although based on good remains, it remains obscure due to a lack of post-naming publications.-Description:...

, Othnielia

Othnielia

Othnielia is a genus of ornithischian dinosaur, named after its original describer, Professor Othniel Charles Marsh, an American paleontologist of the 19th century...

, and Othnielosaurus

Othnielosaurus

Othnielosaurus is a genus of ornithischian dinosaur that lived about 155 to 148 million years ago, during the Late Jurassic-age Morrison Formation of the western United States. It is named in honor of famed paleontologist Othniel Charles Marsh, and was formerly assigned to the genus...

.

During the Early Cretaceous

Early Cretaceous

The Early Cretaceous or the Lower Cretaceous , is the earlier or lower of the two major divisions of the Cretaceous...

, new dinosaurs evolved to replace the old ones. Sauropods were still present, but they were not as diverse as they were in the Jurassic Period. Theropods from the Early Cretaceous of North America include dromaeosaurids such as Deinonychus

Deinonychus

Deinonychus was a genus of carnivorous dromaeosaurid dinosaur. There is one described species, Deinonychus antirrhopus. This 3.4 meter long dinosaur lived during the early Cretaceous Period, about 115–108 million years ago . Fossils have been recovered from the U.S...

and Utahraptor

Utahraptor

Utahraptor is a genus of theropod dinosaurs, including the largest known members of the family Dromaeosauridae. Fossil specimens date to the upper Barremian stage of the early Cretaceous period...

, Acrocanthosaurus

Acrocanthosaurus

Acrocanthosaurus is a genus of theropod dinosaur that existed in what is now North America during the Aptian and early Albian stages of the Early Cretaceous. Like most dinosaur genera, Acrocanthosaurus contains only a single species, A. atokensis. Its fossil remains are found mainly in the U.S...

, and Microvenator

Microvenator

Microvenator is a genus of dinosaur from the Early Cretaceous Cloverly Formation in what is now south central Montana. Microvenator was an oviraptorosaurian theropod. The holotype fossil is an incomplete skeleton, most likely a juvenile, with a living length of about four feet. The adult size of...

. Sauropods included Astrodon

Astrodon

Astrodon was a genus of large herbivorous sauropod dinosaur, related to Brachiosaurus, that lived in what is now the eastern United States during the Early Cretaceous period. Its fossils have been found in the Arundel Formation, which has been dated through palynomorphs to the Aptian-Albian...

, Pleurocoelus, and Sauroposeidon

Sauroposeidon

Sauroposeidon is a genus of sauropod dinosaur known from four neck vertebrae that were found in the southeastern portion of the US state of Oklahoma. The fossils were found in rocks dating to the Early Cretaceous, a period when the sauropods of North America had diminished in both size and...

. Ornithischians were more diverse than they were in the Jurassic Period. Tenontosaurus

Tenontosaurus

Tenontosaurus is a genus of medium- to large-sized ornithopod dinosaur. The genus is known from the late Aptian to Albian ages of the middle Cretaceous period sediments of western North America, dating between 115 to 108 million years ago...

, Hypsilophodon

Hypsilophodon

Hypsilophodon is an ornithopod dinosaur genus from the Early Cretaceous period of Europe. It was a small bipedal animal with an herbivorous or possibly omnivorous diet...

, Iguanodon

Iguanodon

Iguanodon is a genus of ornithopod dinosaur that lived roughly halfway between the first of the swift bipedal hypsilophodontids and the ornithopods' culmination in the duck-billed dinosaurs...

, Protohadros

Protohadros

Protohadros is a genus of herbivorous ornithischian dinosaur from the Late Cretaceous , 95 million years ago....

, and Eolambia

Eolambia

Eolambia is a genus of herbivorous iguanodontian dinosaur from the mid-Cretaceous Period of the USA.In 1992 Carole Jones and her husband Ramal Jones near Castle Dale in Emery County, Utah, on the San Rafael Swell Anticline discovered a fossil site which would be named the Carol Quarry in her honour...

are some of the ornithopods that lived during this time period. Ankylosaurs replaced their stegosaur cousins in the Cretaceous. Ankylosaurs from the Early Cretaceous of North America include Sauropelta

Sauropelta

Sauropelta is a genus of nodosaurid dinosaur that existed in the Early Cretaceous Period of North America. One species has been named although others may have existed. Anatomically, Sauropelta is one of the most well-understood nodosaurids, with fossilized remains recovered in the U.S. states of...

and Gastonia

Gastonia

Gastonia may refer to:Places:*Gastonia, North Carolina, United StatesIn biology:*Gastonia , a genus in the ivy or ginseng family*Gastonia , a genus of ankylosaur...

. Therizinosaurs such as Falcarius

Falcarius

Falcarius is a genus of therizinosaurian dinosaur found in east-central Utah, United States. Its name is derived from the word sickle , which scientists have used to describe its unwieldy clawed hands...

are also known from the Early Cretaceous of North America.

Finally, the Late Cretaceous

Late Cretaceous

The Late Cretaceous is the younger of two epochs into which the Cretaceous period is divided in the geologic timescale. Rock strata from this epoch form the Upper Cretaceous series...

 Period, the greatest abundance and diversity of dinosaurs of all time lived in North America. During the early part of the Late Cretaceous, the therizinosaur Nothronychus

Nothronychus

Nothronychus is a genus of theropod dinosaur classified in the group Therizinosauria, from the Cretaceous of North America.The type species of this dinosaur, Nothronychus mckinleyi, was described by James Kirkland and Douglas G. Wolfe in 2001...

and the ceratopsian Zuniceratops

Zuniceratops

Zuniceratops was a ceratopsian dinosaur from the mid Turonian of the Late Cretaceous Period of what is now New Mexico, United States...

lived. During the Campanian

Campanian

The Campanian is, in the ICS' geologic timescale, the fifth of six ages of the Late Cretaceous epoch . The Campanian spans the time from 83.5 ± 0.7 Ma to 70.6 ± 0.6 Ma ...

 stage of the Late Cretaceous, an enormous diversity of dinosaurs is known. Theropods included the tyrannosaurs Albertosaurus

Albertosaurus

Albertosaurus is a genus of tyrannosaurid theropod dinosaur that lived in western North America during the Late Cretaceous Period, more than 70 million years ago. The type species, A. sarcophagus, was apparently restricted in range to the modern-day Canadian province of Alberta, after which...

, Gorgosaurus

Gorgosaurus

Gorgosaurus is a genus of tyrannosaurid theropod dinosaur that lived in western North America during the Late Cretaceous Period, between about 76.5 and 75 million years ago. Fossil remains have been found in the Canadian province of Alberta and possibly the U.S. state of Montana....

, Daspletosaurus

Daspletosaurus

Daspletosaurus is a genus of tyrannosaurid theropod dinosaur that lived in western North America between 77 and 74 million years ago, during the Late Cretaceous Period. Fossils of the only named species were found in Alberta, although other possible species from Alberta and Montana await...

, Appalachiosaurus

Appalachiosaurus

Appalachiosaurus is a genus of tyrannosauroid theropod dinosaur from the Late Cretaceous Period of eastern North America. Like almost all theropods, it was a bipedal predator. Only a juvenile skeleton has been found, representing an animal over 7 meters long and weighing over...

, and Dryptosaurus

Dryptosaurus

Dryptosaurus was a genus of primitive tyrannosaur that lived in Eastern North America during the middle Maastrichtian stage of the Late Cretaceous period. Although largely unknown now outside of academic circles, a famous painting of the genus by Charles R...

, and the dromaeosaurids Dromaeosaurus

Dromaeosaurus

Dromaeosaurus was a genus of theropod dinosaur which lived during the Late Cretaceous period , sometime between 76.5 and 74.8 million years ago, in the western United States and Alberta, Canada. The name means 'running lizard'....

, Saurornitholestes

Saurornitholestes

Saurornitholestes is a genus of carnivorous dromaeosaurid theropod dinosaur from the late Cretaceous of Alberta, Montana and New Mexico....

, Atrociraptor

Atrociraptor

Atrociraptor is a genus of dromaeosaurid theropod dinosaur from the Late Cretaceous of Alberta, Canada....

, and Bambiraptor

Bambiraptor

Bambiraptor is a Late Cretaceous, 75 million year old, bird-like dromaeosaurid theropod dinosaur described by scientists at the University of Kansas, Yale University, and the University of New Orleans....

. Ceratopsians, such as Pachyrhinosaurus

Pachyrhinosaurus

Pachyrhinosaurus is a genus of ceratopsid dinosaurs from the Late Cretaceous period of North America. The first examples were discovered by Charles M. Sternberg in Alberta, Canada, in 1946, and named in 1950. Over a dozen partial skulls and a large assortment of other fossils from various species...

, Styracosaurus

Styracosaurus

Styracosaurus was a genus of herbivorous ceratopsian dinosaur from the Cretaceous Period , about 76.5 to 75.0 million years ago...

, Centrosaurus

Centrosaurus

Centrosaurus is a genus of herbivorous ceratopsian dinosaurs from the late Cretaceous of Canada. Their remains have been found in the Dinosaur Park Formation and uppermost Oldman Formation, dating from 76.5 to 75.5 million years ago....

Monoclonius

Monoclonius

Monoclonius was a ceratopsian dinosaur from the Judith River Formation of Late Cretaceous Montana and Canada. It is often confused with Centrosaurus, a similar genus of ceratopsian . Monoclonius was described by Edward Drinker Cope in 1876...

, Brachyceratops

Brachyceratops

Brachyceratops is a dubious genus of ceratopsian dinosaur known only from partial juvenile specimens dating to the late Cretaceous Period of Montana, United States....

, Pentaceratops

Pentaceratops

Pentaceratops is a genus of ceratopsid dinosaur from the late Cretaceous Period of what is now North America. The appearance of Pentaceratops sternbergii in the fossil record marks the end of the Judithian land vertebrate age and the start of the Kirtlandian...

, and Leptoceratops

Leptoceratops

Leptoceratops , was a primitive ceratopsian dinosaur genus from the Late Cretaceous Period of what is now Western North America, at the same time as its giant...

also existed. Among hadrosaurs, Parasaurolophus

Parasaurolophus

Parasaurolophus is a genus of ornithopod dinosaur that lived in what is now North America during the Late Cretaceous Period, about 76.5–73 million years ago. It was an herbivore that walked both as a biped and a quadruped. Three species are recognized: P. walkeri , P. tubicen, and the...

, Corythosaurus

Corythosaurus

Corythosaurus is a genus of duck-billed dinosaur from the Upper Cretaceous Period, about 77-76.5 million years ago. It lived in what is now North America...

, Lambeosaurus

Lambeosaurus

Lambeosaurus is a genus of hadrosaurid dinosaur that lived about 76 to 75 million years ago, in the Late Cretaceous Period of North America. This bipedal/quadrupedal, herbivorous dinosaur is known for its distinctive hollow cranial crest, which in the best-known species resembled a hatchet...

, Saurolophus

Saurolophus

Saurolophus is a genus of large hadrosaurine duckbill that lived about 69.5-68.5 million years ago, in the Late Cretaceous of North America and Asia; it is one of the few genera of dinosaurs known from multiple continents. It is distinguished by a spike-like crest which projects up and back...

, and Prosaurolophus

Prosaurolophus

Prosaurolophus is a genus of hadrosaurid dinosaur from the Late Cretaceous of North America. It is known from the remains of at least 25 individuals belonging to two species, including skulls and skeletons, but it remains obscure...

existed. During the latest Cretaceous, the Maastrichtian

Maastrichtian

The Maastrichtian is, in the ICS' geologic timescale, the latest age or upper stage of the Late Cretaceous epoch or Upper Cretaceous series, the Cretaceous period or system, and of the Mesozoic era or erathem. It spanned from 70.6 ± 0.6 Ma to 65.5 ± 0.3 Ma...

 stage, the diversity of dinosaurs wasn't as great as the preceding Campanian stage. North American herbivorous dinosaurs from this time period include the titanosaur

Titanosaur

Titanosaurs were a diverse group of sauropod dinosaurs, which included Saltasaurus and Isisaurus. It includes some of the heaviest creatures ever to walk the earth, such as Argentinosaurus and Paralititan — which some believe have weighed up to 100 tonnes...

 sauropod Alamosaurus

Alamosaurus

Alamosaurus is a genus of titanosaurian sauropod dinosaur from the Late Cretaceous Period of what is now North America. It was a large quadrupedal herbivore. Isolated vertebrae and limb bones indicate that it reached sizes comparable to Argentinosaurus and Puertasaurus, which would make it the...

, the ceratopsians Triceratops

Triceratops

Triceratops is a genus of herbivorous ceratopsid dinosaur which lived during the late Maastrichtian stage of the Late Cretaceous Period, around 68 to 65 million years ago in what is now North America. It was one of the last dinosaur genera to appear before the great Cretaceous–Paleogene...

and Torosaurus

Torosaurus

Torosaurus is a genus of ceratopsid dinosaur that lived during the late Cretaceous period , between 70 and 65 million years ago. It possessed one of the largest skulls of any known land animal. The frilled skull reached in length...

, the pachycephalosaurs Pachycephalosaurus

Pachycephalosaurus

Pachycephalosaurus is a genus of pachycephalosaurid dinosaur. It lived during the Late Cretaceous Period of what is now North America. Remains have been excavated in Montana, South Dakota, and Wyoming. It was an herbivorous or omnivorous creature which is only known from a single skull and a few...

, Stygimoloch

Stygimoloch

Stygimoloch is a putative genus of pachycephalosaurid dinosaur from the end of the Cretaceous period, roughly 65 million years ago...

, Dracorex

Dracorex

Dracorex is a dinosaur genus of the family Pachycephalosauridae, from the Late Cretaceous of North America.The type species is Dracorex hogwartsia, meaning "dragon king of Hogwarts". It is known from one nearly complete skull , as well as four cervical vertebrae including the atlas, third, ninth...

, and Stegoceras

Stegoceras

Stegoceras is a genus of plant-eating pachycephalosaurid dinosaur that lived in what is now North America during the Late Cretaceous period....

, the hadrosaurs Edmontosaurus

Edmontosaurus

Edmontosaurus is a genus of crestless hadrosaurid dinosaur. It contains two species: Edmontosaurus regalis and Edmontosaurus annectens. Fossils of E. regalis have been found in rocks of western North America that date from the late Campanian stage of the Cretaceous Period 73 million years ago,...

and Anatotitan

Anatotitan

Anatotitan is a genus of flat-headed or hadrosaurine hadrosaurid ornithopod dinosaur from the very end of the Cretaceous Period, in what is now North America...

. Predatory dinosaurs from this time period icluded the tyrannosaurids Tyrannosaurus

Tyrannosaurus

Tyrannosaurus meaning "tyrant," and sauros meaning "lizard") is a genus of coelurosaurian theropod dinosaur. The species Tyrannosaurus rex , commonly abbreviated to T. rex, is a fixture in popular culture. It lived throughout what is now western North America, with a much wider range than other...

and Nanotyrannus

Nanotyrannus

Nanotyrannus is a genus of tyrannosaurid dinosaur, known only from two juvenile specimens, which may in fact represent juvenile specimens of the contemporary species Tyrannosaurus rex.-History:...

(which may just be a juvenile of the former), and the troodontid Troodon

Troodon

Troodon is a genus of relatively small, bird-like dinosaur from the Late Cretaceous period . Discovered in 1855, it was among the first dinosaurs found in North America...

.

List of North American dinosaurs

Name	Period	Diet	Notes
Abydosaurus	Cretaceous	herbivore	—
Achelousaurus Achelousaurus Achelousaurus is a genus of centrosaurine ceratopsid dinosaurs from the Late Cretaceous Period of what is now North America, dated to 74 million years ago...	Cretaceous	herbivore	—
Acristavus Acristavus Acristavus is a genus of hadrosaurine hadrosaurid dinosaur. Fossils have been found from the Campanian Two Medicine Formation in Montana and Wahweap Formation in Utah. The type species A. gagslarsoni was named in 2011. Unlike nearly all hadrosaurids except Edmontosaurus, Acristavus lacked...	Cretaceous	herbivore	—
Acrocanthosaurus Acrocanthosaurus Acrocanthosaurus is a genus of theropod dinosaur that existed in what is now North America during the Aptian and early Albian stages of the Early Cretaceous. Like most dinosaur genera, Acrocanthosaurus contains only a single species, A. atokensis. Its fossil remains are found mainly in the U.S...	Cretaceous	carnivore	—
Agathaumas Agathaumas Agathaumas is a dubious genus of a large ceratopsid dinosaur that lived in Wyoming during the Late Cretaceous . The name comes from Greek, αγαν - 'much' and θαυμα - 'wonder'...	Cretaceous	herbivore	Dubious, see article
Agujaceratops Agujaceratops Agujaceratops is a genus of herbivorous ceratopsian dinosaur. It is a chasmosaurine ceratopsian which lived during the Late Cretaceous period in what is now Texas. Originally known as Chasmosaurus mariscalensis and described by Lehman in 1989, it was moved to a new genus by Lucas, Sullivan and...	Cretaceous	herbivore	—
Ahshislepelta Ahshislepelta Ahshislepelta is a genus of herbivorousankylosaurine ankylosaurid dinosaur from Late Cretaceous deposits of San Juan Basin, New Mexico....	Cretaceous	herbivore	—
Alamosaurus Alamosaurus Alamosaurus is a genus of titanosaurian sauropod dinosaur from the Late Cretaceous Period of what is now North America. It was a large quadrupedal herbivore. Isolated vertebrae and limb bones indicate that it reached sizes comparable to Argentinosaurus and Puertasaurus, which would make it the...	Cretaceous	herbivore	—
Alaskacephale Alaskacephale Alaskacephale was a genus of pachycephalosaurid dinosaur that lived in the late Campanian stage of the Late Cretaceous ....	Cretaceous	herbivore	—
Albertaceratops Albertaceratops Albertaceratops was a genus of centrosaurine horned dinosaur from the middle Campanian-age Upper Cretaceous Oldman Formation of Alberta, Canada....	Cretaceous	herbivore	—
Albertonykus Albertonykus Albertonykus is a genus of alvarezsaurid dinosaur from lower Maastrichtian-age rocks of the Horseshoe Canyon Formation of Alberta, Canada. It is known from forelimb and hindlimb remains from multiple individuals. All but two of the specimens come from a bonebed dominated by Albertosaurus...	Cretaceous	carnivore/insectivore	—
Albertosaurus Albertosaurus Albertosaurus is a genus of tyrannosaurid theropod dinosaur that lived in western North America during the Late Cretaceous Period, more than 70 million years ago. The type species, A. sarcophagus, was apparently restricted in range to the modern-day Canadian province of Alberta, after which...	Cretaceous	carnivore	—
Aletopelta Aletopelta Aletopelta coombsi was an ankylosaurian ornithischian dinosaur whose fossils were found in Southern California.Etymologically, the generic name is composed of the Greek terms aletes and pelte, meaning, respectively "wandering" and "shield"...	Cretaceous	herbivore	—
Allosaurus Allosaurus Allosaurus is a genus of large theropod dinosaur that lived 155 to 150 million years ago during the late Jurassic period . The name Allosaurus means "different lizard". It is derived from the Greek /allos and /sauros...	Jurassic	carnivore	—
Ammosaurus Ammosaurus Ammosaurus is a genus of sauropodomorph dinosaur from the Early and Middle Jurassic Period of North America. At 4 meters in length, it was small compared to some other members of its suborder, which included the largest animals ever to walk the Earth...	Jurassic	herbivore/omnivore	—
Amphicoelias Amphicoelias Amphicoelias is a genus of herbivorous sauropod dinosaur that includes what may be the largest dinosaur ever discovered, A. fragillimus. Based on surviving descriptions of a single fossil bone, A. fragillimus may have been the longest known vertebrate at in length, and may have had a mass of up...	Jurassic	herbivore	—
Anasazisaurus Anasazisaurus Anasazisaurus is a genus of hadrosaurid ornithopod dinosaur that lived about 74 million years ago, in the Late Cretaceous Period. It was found in the Farmington Member of the Kirtland Formation, in the San Juan Basin of New Mexico, United States. Only a partial skull has been found to date...	Cretaceous	herbivore	—
Anatotitan Anatotitan Anatotitan is a genus of flat-headed or hadrosaurine hadrosaurid ornithopod dinosaur from the very end of the Cretaceous Period, in what is now North America...	Cretaceous	herbivore	—
Anchiceratops Anchiceratops Anchiceratops is a genus of chasmosaurine ceratopsid dinosaur from the Late Cretaceous Period of western North America. Like other ceratopsids, it was a quadrupedal herbivore with three horns on its face, a parrot-like beak, and a long frill extending from the back of its head. The two horns above...	Cretaceous	herbivore	—
Anchisaurus Anchisaurus Anchisaurus is a genus of basal sauropodomorph, and was an early herbivorous dinosaur. Until recently it was classed as a member of Prosauropoda. The name comes from the Greek αγχι/agkhi...	Jurassic	herbivore	—
Angulomastacator Angulomastacator Angulomastacator is a genus of duck-billed dinosaur from the Campanian-age Aguja Formation of Big Bend National Park, Texas...	Cretaceous	herbivore	—
Animantarx Animantarx Animantarx is a genus of nodosaurid ankylosaurian dinosaur from the Upper Cretaceous of western North America. Like other nodosaurs, it would have been a slow-moving quadrupedal herbivore covered in heavy armor scutes, but without a tail club...	Cretaceous	herbivore	—
Ankylosaurus Ankylosaurus Ankylosaurus is a genus of ankylosaurid dinosaur, containing one species, A. magniventris...	Cretaceous	herbivore	—
Antrodemus Antrodemus Antrodemus is a dubious genus of theropod dinosaur from the Kimmeridgian-Tithonian-age Upper Jurassic Morrison Formation of Middle Park, Colorado...	Jurassic	carnivore	Probably synonymous with Allosaurus Allosaurus Allosaurus is a genus of large theropod dinosaur that lived 155 to 150 million years ago during the late Jurassic period . The name Allosaurus means "different lizard". It is derived from the Greek /allos and /sauros... , see article
Apatodon Apatodon Apatodon is a dubious genus of dinosaur, possibly synonymous with Allosaurus.When Marsh named it, he thought it was a jaw with a tooth from a Mesozoic pig, but it was soon shown that the specimen was an eroded vertebra, from a dinosaur possibly from the Morrison Formation of the Rocky Mountain region...	(unknown)	(unknown)	Highly dubious, see article
Apatosaurus Apatosaurus Apatosaurus , also known by the popular but scientifically deprecated synonym Brontosaurus, is a genus of sauropod dinosaur that lived from about 154 to 150 million years ago, during the Jurassic Period . It was one of the largest land animals that ever existed, with an average length of and a...	Jurassic	herbivore	Formerly known as Brontosaurus
Appalachiosaurus Appalachiosaurus Appalachiosaurus is a genus of tyrannosauroid theropod dinosaur from the Late Cretaceous Period of eastern North America. Like almost all theropods, it was a bipedal predator. Only a juvenile skeleton has been found, representing an animal over 7 meters long and weighing over...	Cretaceous	carnivore	—
Arkansaurus Arkansaurus "Arkansaurus fridayi" is the informal name of a dinosaur that was discovered in Lockesburg, Arkansas. "Arkansaurus fridayi" was a bipedal coelurosaurian dinosaur, a group of theropods that includes the Tyrannosauridae, Ornithomimidae, and Maniraptora. Its nearest relative was thought to be...	Cretaceous	carnivore	—
Arrhinoceratops Arrhinoceratops Arrhinoceratops is a genus of ceratopsian dinosaur. The name was coined as its original describer concluded it had no nose-horn, however further analysis revealed this not to be the case...	Cretaceous	herbivore	—
Astrodon Astrodon Astrodon was a genus of large herbivorous sauropod dinosaur, related to Brachiosaurus, that lived in what is now the eastern United States during the Early Cretaceous period. Its fossils have been found in the Arundel Formation, which has been dated through palynomorphs to the Aptian-Albian...	Cretaceous	herbivore	—
Atlantosaurus Atlantosaurus Atlantosaurus is a dubious genus of sauropod dinosaur. The type specimen, found by Arthur Lakes in the Morrison Formation of Colorado, USA, was described by Othniel Charles Marsh, a Professor of Paleontology at Yale University , in 1877 as "Titanosaurus" montanus...	Jurassic	herbivore	—
Atrociraptor Atrociraptor Atrociraptor is a genus of dromaeosaurid theropod dinosaur from the Late Cretaceous of Alberta, Canada....	Cretaceous	carnivore	—
Aublysodon Aublysodon Aublysodon is a name given to a large number of carnivorous dinosaur teeth of a certain form found in numerous late Cretaceous period geological formations...	Cretaceous	carnivore	—
Avaceratops Avaceratops Avaceratops is a genus of small ceratopsian dinosaur which lived during the late Campanian during the Late Cretaceous Period in what are now the Northwest United States.-Discoveries and species:...	Cretaceous	herbivore	—
Bambiraptor Bambiraptor Bambiraptor is a Late Cretaceous, 75 million year old, bird-like dromaeosaurid theropod dinosaur described by scientists at the University of Kansas, Yale University, and the University of New Orleans....	Cretaceous	carnivore	—
Barosaurus Barosaurus Barosaurus ; Greek barys/βαρυς meaning 'heavy' and saurus/σαυρος meaning 'lizard', 'heavy lizard') was a giant, long-tailed, long-necked, plant-eating dinosaur closely related to the more familiar Diplodocus...	Jurassic	herbivore	—
Beelemodon Beelemodon "Beelemodon" is the informal name given to a genus of undescribed dinosaur from the Late Jurassic. It was possibly a coelurosaur. The fossils of "Beelemodon" consist of one partial skeleton, which was found in the U.S. state of Colorado. The name first appeared in print in 1997, when paleontologist...	Jurassic	(unknown)	—
Bistahieversor Bistahieversor Bistahieversor is a genus of tyrannosauroid dinosaur. Bistahieversor existed around 75 million years ago during the Late Cretaceous....	Cretaceous	carnivore	—
Brachiosaurus Brachiosaurus Brachiosaurus is a genus of sauropod dinosaur from the Jurassic Morrison Formation of North America. It was first described by Elmer S. Riggs in 1903 from fossils found in the Grand River Canyon of western Colorado, in the United States. Riggs named the dinosaur Brachiosaurus altithorax,...	Jurassic/Cretaceous	herbivore	—
Brachyceratops Brachyceratops Brachyceratops is a dubious genus of ceratopsian dinosaur known only from partial juvenile specimens dating to the late Cretaceous Period of Montana, United States....	Cretaceous	herbivore	Only juvenile fossils found so far
Brachylophosaurus Brachylophosaurus Brachylophosaurus was a mid-sized member of the hadrosaurid family of dinosaurs. It is known from several skeletons and bonebed material from the Judith River Formation of Montana and the Oldman Formation of Alberta, living about 76.5 million years ago....	Cretaceous	herbivore	—
Brontomerus Brontomerus Brontomerus is a genus of camarasauromorph sauropod which lived during the early Cretaceous . It was named in 2011 and the type species is Brontomerus mcintoshi...	Cretaceous	herbivore	—
Brontoraptor Brontoraptor "Brontoraptor" is the informal name given to a genus of dinosaur from the Kimmeridgean stage Upper Jurassic Morrison Formation. It was a tetanuran theropod which lived in what is present-day Wyoming, and may have been a megalosaur...	Jurassic	carnivore	—
Camarasaurus Camarasaurus Camarasaurus meaning 'chambered lizard', referring to the hollow chambers in its vertebrae was a genus of quadrupedal, herbivorous dinosaurs. It was the most common of the giant sauropods to be found in North America...	Jurassic	herbivore	—
Camposaurus Camposaurus Camposaurus is a coelophysoid dinosaur genus from the Late Triassic of North America. With fossils dating back to the early to middle Norian stage, it is the oldest known neotheropod. It is known from partial lower leg bones, holotype UCMP 34498, and other fragmentary material...	Triassic	carnivore	Dubious, see article
Camptosaurus Camptosaurus Camptosaurus is a genus of plant-eating, beaked ornithischian dinosaurs of the Late Jurassic period of western North America. The name means 'flexible lizard', ....	Jurassic	herbivore	—
Capitalsaurus Capitalsaurus "Capitalsaurus" is the informal name given to a genus of dinosaur from North America. Its fossils were discovered in Washington, DC. It was a theropod, and it lived during the Cretaceous...	Cretaceous	carnivore	—
Caseosaurus Caseosaurus Caseosaurus is a genus of dinosaur from the Late Triassic of North America. The type species, Caseosaurus crosbyensis, was formally described by Hunt, Lucas, Heckert, Sullivan and Lockley in 1998. It was found in the Dockum Formation of Texas, in strata dating to the Late Triassic...	Triassic	carnivore	—
Cedarosaurus Cedarosaurus Cedarosaurus was a nasal-crested macronarian dinosaur genus from the Early Cretaceous Period . It was a sauropod which lived in what is now Utah...	Cretaceous	herbivore	—
Cedarpelta Cedarpelta Cedarpelta is an extinct genus of basal ankylosaurid ankylosaur, based on material recovered from the Lower Cretaceous of North America. The skull lacks extensive cranial ornamentation, a trait which has been interpreted as plesiomorphic for ankylosaurs....	Cretaceous	herbivore	—
Cedrorestes Cedrorestes Cedrorestes is a genus of iguanodontian dinosaur from the Early Cretaceous of Utah...	Cretaceous	herbivore	—
Centrosaurus Centrosaurus Centrosaurus is a genus of herbivorous ceratopsian dinosaurs from the late Cretaceous of Canada. Their remains have been found in the Dinosaur Park Formation and uppermost Oldman Formation, dating from 76.5 to 75.5 million years ago....	Cretaceous	herbivore	Not to be confused with Kentrosaurus Kentrosaurus Kentrosaurus is a genus of stegosaurid dinosaur from the Late Jurassic of Tanzania. Its fossils have been found only in the Tendaguru Formation of Tanzania, dated to the Kimmeridgian stage, between about 155.7 ± 4 Ma and 150.8 ± 4 Ma . Apparently, all finds belong to one species, K...
Cerasinops Cerasinops Cerasinops was a small ceratopsian dinosaur. It lived during the Campanian of the late Cretaceous Period. Its fossils have been found in Two Medicine Formation, in Montana....	Cretaceous	herbivore	—
Ceratops Ceratops Ceratops is a dubious genus of ceratopsian dinosaur which lived during the Late Cretaceous. Its fossils have been found in Montana. Although poorly known, Ceratops is important in the history of dinosaurs, since it is the type species for which both Ceratopsia and Ceratopsidae are named...	Cretaceous	herbivore	—
Ceratosaurus Ceratosaurus Ceratosaurus meaning "horned lizard", in reference to the horn on its nose , was a large predatory theropod dinosaur from the Late Jurassic Period , found in the Morrison Formation of North America, in Tanzania and Portugal...	Jurassic	carnivore	—
Chasmosaurus Chasmosaurus Chasmosaurus is a genus of ceratopsid dinosaur from the Upper Cretaceous Period of North America. Its name means 'opening lizard', referring to the large openings in its frill . With a length of and a weight of , Chasmosaurus was a ceratopsian of average size...	Cretaceous	herbivore	—
Chindesaurus Chindesaurus Chindesaurus is a genus of saurischian dinosaur named after Chinde Point , near where the genoholotype specimen was discovered in the Chinle Formation of Petrified Forest National Park, Arizona, by Bryan Small in 1985...	Triassic	carnivore	—
Chirostenotes Chirostenotes Chirostenotes is a genus of oviraptorosaurian dinosaur from the late Cretaceous of Alberta, Canada. The type species is Chirostenotes pergracilis. Some researchers recognize a second species, C...	Cretaceous	carnivore	—
Cionodon Cionodon Cionodon was a genus of dinosaur from the Late Cretaceous Period. The type species, Cionodon arctatus lived in what is now present-day Colorado. It is classified as a hadrosaur, and was formally described by Edward Drinker Cope in 1874. It is a nomen dubium because it is based on very fragmentary...	Cretaceous	herbivore	—
Claorhynchus Claorhynchus Claorhynchus is a dubious genus of ornithischian dinosaur with a confusing history behind it...	Cretaceous	herbivore	Dubious, see article
Claosaurus Claosaurus Claosaurus is a genus of primitive hadrosaurid that lived during the Late Cretaceous Period .Evidence of its existence was first found near the Smoky Hill River in Kansas, USA in the form of partial skull fragments and as an articulated postcranial skeleton...	Cretaceous	herbivore	—
Coahuilaceratops Coahuilaceratops Coahuilaceratops is a genus of herbivorous ceratopsian dinosaur. It is a chasmosaurine ceratopsian which lived during the Late Cretaceous period in what is now southern Coahuila in northern Mexico. It is known from the holotype CPC 276, a partial skeleton of an adult individual which...	Cretaceous	herbivore	—
Coelophysis Coelophysis Coelophysis , meaning "hollow form" in reference to its hollow bones , is one of the earliest known genera of dinosaur...	Triassic	carnivore	—
Coelurus Coelurus Coelurus is a genus of coelurosaur dinosaur from the Late Jurassic period . The name means "hollow tail", referring to its hollow tail vertebrae...	Jurassic	carnivore	—
Colepiocephale Colepiocephale Colepiocephale is a genus of pachycephalosaurid dinosaur from Late Cretaceous deposits of Alberta, Canada. It was collected from the Foremost Formation . The type species, C. lambei, was originally described by Sternberg , and later renamed by Sullivan in 2003. C...	Cretaceous	herbivore	—
Comanchesaurus Comanchesaurus "Comanchesaurus" is an informal name for fossilized remains from the Late Triassic of New Mexico that were initially interpreted as belonging to a theropod dinosaur. The remains, NMMNH P-4569, consist of a partial skeleton including vertebral centra and hindlimb bones, and came from the Norian-age...	Triassic	(unknown)	—
Corythosaurus Corythosaurus Corythosaurus is a genus of duck-billed dinosaur from the Upper Cretaceous Period, about 77-76.5 million years ago. It lived in what is now North America...	Cretaceous	herbivore	—
Daemonosaurus Daemonosaurus Daemonosaurus is a genus of theropod dinosaur from the Late Triassic of New Mexico. Fossils have been found from deposits in the Chinle Formation, which is latest Triassic in age. While theropods had diversified into several specialized groups by this time, Daemonosaurus is a basal theropod that...	Triassic	carnivore	—
Dakotadon Dakotadon Dakotadon is a genus of iguanodont dinosaur from the Barremian-age Lower Cretaceous Lakota Formation of South Dakota, USA, known from a partial skull. It was first described in 1989 as Iguanodon lakotaensis, by David B. Weishampel and Philip R. Bjork. Its assignment has been controversial. Some...	Cretaceous	herbivore	—
Daspletosaurus Daspletosaurus Daspletosaurus is a genus of tyrannosaurid theropod dinosaur that lived in western North America between 77 and 74 million years ago, during the Late Cretaceous Period. Fossils of the only named species were found in Alberta, although other possible species from Alberta and Montana await...	Cretaceous	carnivore	—
Deinodon Deinodon Deinodon is a name assigned to tyrannosaurid teeth of the Late Cretaceous of Montana by paleontologist Joseph Leidy in 1856...	Cretaceous	carnivore	Dubious, see article
Deinonychus Deinonychus Deinonychus was a genus of carnivorous dromaeosaurid dinosaur. There is one described species, Deinonychus antirrhopus. This 3.4 meter long dinosaur lived during the early Cretaceous Period, about 115–108 million years ago . Fossils have been recovered from the U.S...	Cretaceous	carnivore	—
Diabloceratops Diabloceratops Diabloceratops is a genus of herbivorous dinosaur in the infraorder Ceratopsia. It lived in and around Utah during the Campanian stage.-Name:...	Cretaceous	herbivore	—
Diclonius Diclonius Diclonius is a genus of dinosaur from the Late Cretaceous. It was a hadrosaur based solely on teeth. Its fossils have been found in North America. The name is in reference to the method of tooth replacement, in which newly erupting replacement teeth could be in functional use at the same time as...	Cretaceous	herbivore	—
Dilophosaurus Dilophosaurus Dilophosaurus was a theropod dinosaur from the Sinemurian stage of the Early Jurassic Period, about 193 million years ago. The first specimens were described in 1954, but it was not until over a decade later that the genus received its current name...	Jurassic	carnivore	—
Diplodocus Diplodocus Diplodocus , or )is a genus of diplodocid sauropod dinosaur whose fossils were first discovered in 1877 by S. W. Williston. The generic name, coined by Othniel Charles Marsh in 1878, is a Neo-Latin term derived from Greek "double" and "beam", in reference to its double-beamed chevron bones...	Jurassic	herbivore	—
Diplotomodon Diplotomodon Diplotomodon is a dubious genus of dinosaur from New Jersey. It is only known from a single tooth found in either the Navesink or Hornerstown Formation, dating to the Maastrichtian age of the late Cretaceous period...	Cretaceous	carnivore	—
Dracorex Dracorex Dracorex is a dinosaur genus of the family Pachycephalosauridae, from the Late Cretaceous of North America.The type species is Dracorex hogwartsia, meaning "dragon king of Hogwarts". It is known from one nearly complete skull , as well as four cervical vertebrae including the atlas, third, ninth...	Cretaceous	herbivore	—
Drinker Drinker Drinker was a genus of hypsilophodont dinosaur from the late Jurassic period of North America. Although based on good remains, it remains obscure due to a lack of post-naming publications.-Description:...	Jurassic	herbivore	—
Dromaeosaurus Dromaeosaurus Dromaeosaurus was a genus of theropod dinosaur which lived during the Late Cretaceous period , sometime between 76.5 and 74.8 million years ago, in the western United States and Alberta, Canada. The name means 'running lizard'....	Cretaceous	carnivore	—
Dromiceiomimus	Cretaceous	carnivore(?)	—
Dryosaurus Dryosaurus Dryosaurus is a genus of an ornithopod dinosaur that lived in the Late Jurassic period. It was an iguanodont . Fossils have been found in the western United States, and were first discovered in the late 19th century...	Jurassic	herbivore	—
Dryptosaurus Dryptosaurus Dryptosaurus was a genus of primitive tyrannosaur that lived in Eastern North America during the middle Maastrichtian stage of the Late Cretaceous period. Although largely unknown now outside of academic circles, a famous painting of the genus by Charles R...	Cretaceous	carnivore	—
Dyoplosaurus Dyoplosaurus Dyoplosaurus is the name given to a genus of ankylosaurid dinosaur. It lived during the Late Cretaceous near what is now the Red Deer River in Alberta, Canada and was named by William Parks in 1924, based on holotype ROM 784, a partial skeleton including parts of the skull and lower jaws.The type...	Cretaceous	herbivore	—
Dysganus Dysganus Dysganus is the name given to a dubious genus of dinosaur from the Late Cretaceous. It was a ceratopsian. Its fossils have been found in Montana....	Cretaceous	herbivore	—
Dyslocosaurus Dyslocosaurus Dyslocosaurus is the name given in 1992 to a genus of sauropod dinosaur, possibly from the Late Jurassic Period. Its fossils were found in North America....	Jurassic	herbivore	—
Dystrophaeus Dystrophaeus Dystrophaeus is the name given to an extinct genus of dinosaur from the early Kimmeridgian stage of the Late Jurassic that existed around 155.7 Ma. It was perhaps a diplodocoid sauropod. Its fossils were found in the Morrison Formation of Utah....	Jurassic	herbivore	—
Edmarka Edmarka Edmarka is a genus of dinosaur from the Late Jurassic of North America. The name honors scientist Bill Edmark. It was a theropod closely related to Torvosaurus, and may, in fact, be a junior synonym of that genus. Its fossils, including a partial skeleton, were found at Como Bluff, Wyoming.The...	Jurassic	carnivore	—
Edmontonia Edmontonia Edmontonia was an armoured dinosaur, a part of the nodosaur family from the Late Cretaceous Period. It is named after the Edmonton Formation , the unit of rock it was found in.-Description:...	Cretaceous	herbivore	—
Edmontosaurus Edmontosaurus Edmontosaurus is a genus of crestless hadrosaurid dinosaur. It contains two species: Edmontosaurus regalis and Edmontosaurus annectens. Fossils of E. regalis have been found in rocks of western North America that date from the late Campanian stage of the Cretaceous Period 73 million years ago,...	Cretaceous	herbivore	—
Einiosaurus Einiosaurus Einiosaurus is a medium-sized centrosaurine ceratopsian from the Upper Cretaceous of northwestern Montana. The name means 'buffalo lizard', in a combination of Blackfeet Indian and Latinized Ancient Greek; the specific name Einiosaurus is a medium-sized centrosaurine (“short-frilled”)...	Cretaceous	herbivore	—
Eobrontosaurus Eobrontosaurus Eobrontosaurus is the name given to a genus of dinosaur from the Late Jurassic of North America. It was a sauropod probably closely related to Apatosaurus. It is known from a single site from the lower Morrison Formation, dating to about 154 million years ago. It grew up to long.The type species, E...	Jurassic	herbivore	—
Eolambia Eolambia Eolambia is a genus of herbivorous iguanodontian dinosaur from the mid-Cretaceous Period of the USA.In 1992 Carole Jones and her husband Ramal Jones near Castle Dale in Emery County, Utah, on the San Rafael Swell Anticline discovered a fossil site which would be named the Carol Quarry in her honour...	Cretaceous	herbivore	—
Eotriceratops Eotriceratops Eotriceratops is a genus of ceratopsian dinosaur which lived during the late Cretaceous period. Its fossils have been found in the uppermost Horseshoe Canyon Formation, dating to about 67.6 million years ago. Its skull is reported to have been around 3 metres long...	Cretaceous	herbivore	—
Epanterias Epanterias Epanterias is a dubious genus of theropod dinosaur from the Kimmeridgian-Tithonian-age Upper Jurassic upper Morrison Formation of Garden Park, Colorado. It was described by Edward Drinker Cope in 1878. The type species is Epanterias amplexus. This genus is based on what is now AMNH 5767, parts of...	Jurassic	carnivore	—
Epichirostenotes Epichirostenotes Epichirostenotes is a genus of oviraptorosaurian dinosaur from the late Cretaceous. Epichirostenotes is known from an incomplete skeleton found in 1923 at the Horseshoe Canyon Formation, in strata dated to about 72 million years ago. It was first named by Robert M. Sullivan, Steven E. Jasinski and...	Cretaceous	carnivore	—
Euoplocephalus Euoplocephalus Euoplocephalus was one of the largest genera of ankylosaurian dinosaurs, at about the size of a small elephant. It is also the ankylosaurian with the best fossil record, so its extensive spiked armor, low-slung body and great club-like tail are well documented.-Description:Among the...	Cretaceous	herbivore	—
Falcarius Falcarius Falcarius is a genus of therizinosaurian dinosaur found in east-central Utah, United States. Its name is derived from the word sickle , which scientists have used to describe its unwieldy clawed hands...	Cretaceous	(disputed)	Apparently in the course of switching from carnivore to herbivore
Fruitadens Fruitadens Fruitadens is a genus of heterodontosaurid dinosaur. The name means "Fruita tooth", in reference to Fruita, Colorado , where its fossils were first found. It is known from partial skulls and skeletons from at least four individuals of differing biological ages, found in Tithonian rocks of the...	Jurassic	omnivore	—
Gargoyleosaurus Gargoyleosaurus Gargoyleosaurus is one of the earliest ankylosaurs known from reasonably complete fossil remains. Its skull measures in length, and its total body length is an estimated . It may have weighed as much as...	Jurassic	herbivore	—
Gastonia Gastonia (dinosaur) Gastonia is a genus of nodosaurid dinosaur from the Early Cretaceous of North America, around 125 million years ago. Closely related to Polacanthus, it has a sacral shield and large shoulder spikes. It is also the first polacanthine dinosaur to have been mounted for display at the Denver Museum of...	Cretaceous	herbivore	—
Geminiraptor Geminiraptor Geminiraptor is a genus of troodontid dinosaur. Geminiraptor lived during the lower Cretaceous period in what is now Utah, USA. It is known from CEUM 7319, a maxilla recovered from the lower Yellow Cat Member of the Cedar Mountain Formation, dating to at least the early Barremian stage...	Cretaceous	omnivore	—
Glishades Glishades Glishades is a genus of hadrosauroid dinosaur that lived in the Late Cretaceous in North America. It is based on AMNH 27414, two partial premaxillae discovered in the Upper Cretaceous rocks of the Two Medicine Formation in Montana...	Cretaceous	herbivore	—
Glyptodontopelta Glyptodontopelta Glyptodontopelta is a genus of dinosaur from the Late Cretaceous. It was an ankylosaur, an armored dinosaur....	Cretaceous	herbivore	—
Gojirasaurus Gojirasaurus Gojirasaurus is a dubious genus of dinosaur named after the giant monster movie character Gojira . It was discovered in the Bull Canyon Formation...	Triassic	carnivore	—
Gorgosaurus Gorgosaurus Gorgosaurus is a genus of tyrannosaurid theropod dinosaur that lived in western North America during the Late Cretaceous Period, between about 76.5 and 75 million years ago. Fossil remains have been found in the Canadian province of Alberta and possibly the U.S. state of Montana....	Cretaceous	carnivore	—
Gravitholus Gravitholus Gravitholus was a genus of dinosaur from the late Cretaceous period . It was a pachycephalosaur, a type of dinosaur with a thick skull made of hardened bone. It lived in what is now Alberta, Canada, and was described in 1979 by W. P. Wall and Peter Galton.The type species is Gravitholus albertae...	Cretaceous	herbivore	—
Gryposaurus Gryposaurus Gryposaurus was a genus of duckbilled dinosaur that lived about 83 to 75.5 million years ago, in the Late Cretaceous of North America...	Cretaceous	herbivore	—
Hadrosaurus Hadrosaurus Hadrosaurus is a valid genus of hadrosaurid dinosaur. In 1858, a skeleton of a dinosaur from this genus was the first dinosaur skeleton known from more than isolated teeth to be found in North America. In 1868, it became the first ever mounted dinosaur skeleton...	Cretaceous	herbivore	—
Hagryphus Hagryphus Hagryphus is an oviraptorosaurian theropod dinosaur from the Upper Cretaceous Period of what is now Utah. To date, only a single species is known, H. giganteus...	Cretaceous	carnivore	—
Hanssuesia Hanssuesia Hanssuesia is a genus of pachycephalosaurid dinosaur from the late Cretaceous period. It lived in what is now Alberta and Montana.Hanssuesia based on material originally named Troodon sternbergi by Barnum Brown and Erich Maren Schlaikjer in 1943. Later, it was transferred to Stegoceras as S....	Cretaceous	herbivore	—
Haplocanthosaurus Haplocanthosaurus Haplocanthosaurus is a genus of sauropod dinosaur. Two species, H. delfsi and H. priscus, are known from incomplete fossil skeletons. It lived during the late Jurassic period , 155 to 152 million years ago. The type species is H. priscus, and the referred species H...	Jurassic	herbivore	—
Hesperonychus Hesperonychus Hesperonychus was a genus of small, carnivorous dromaeosaurid dinosaur. There is one described species, Hesperonychus elizabethae; the type species was named in honor of the woman who collected it in 1982...	Cretaceous	carnivore	—
Hesperosaurus Hesperosaurus Hesperosaurus was a herbivorous dinosaur from the Kimmeridgian to Tithonian epochs of the Jurassic period , whose fossils are found in the state of Wyoming in the United States of America...	Jurassic	herbivore	—
Hippodraco Hippodraco Hippodraco is a genus of herbivorous iguanodontian dinosaur. It is a basal iguanodontian which lived during the Lower Cretaceous period in what is now Utah, USA...	Cretaceous	herbivore	—
Hoplitosaurus Hoplitosaurus Hoplitosaurus was a genus of armored dinosaur related to Polacanthus. It was named from a partial skeleton found in the ?Barremian-age Lower Cretaceous Lakota Formation of Custer County, South Dakota. It is an obscure genus which has been subject to some misinterpretation of its damaged remains...	Cretaceous	herbivore	—
Hypacrosaurus Hypacrosaurus Hypacrosaurus was a genus of duckbill dinosaur similar in appearance to Corythosaurus. Like Corythosaurus, it had a tall, hollow rounded crest, although not as large and straight...	Cretaceous	herbivore	—
Hypsibema Hypsibema Hypsibema is a little-known genus of dinosaur from the Late Cretaceous . Its giant fossils were found in the U.S. states of North Carolina and Missouri...	Cretaceous	herbivore	—
Iguanacolossus Iguanacolossus Iguanacolossus is a genus of herbivorous iguanodontian dinosaur. It is a basal iguanodontian which lived during the lower Cretaceous period in what is now Utah, USA...	Cretaceous	herbivore	—
Jeyawati Jeyawati Jeyawati is a genus of hadrosauroid dinosaur which lived during the Turonian stage of the Late Cretaceous. The type species, J. rugoculus, was described in 2010, based on fossils recovered in the U.S. state of New Mexico....	Cretaceous	herbivore	—
Kayentavenator Kayentavenator Kayentavenator is a small carnivorous dinosaur genus which lived during the Early Jurassic Period; fossils were recovered from the Kayenta Formation of northeastern Arizona and were described in 2010.-Description:...	Jurassic	carnivore	—
Koparion Koparion Koparion is a genus of small theropod dinosaur, known only from isolated teeth. Koparion douglassi, the type specimen, was described by Chure in 1994, who believed it to be a coelurosaurian theropod, possibly one of the oldest known troodontids. Found in Utah, the fossil is from the late Jurassic...	Jurassic	(unknown)	—
Kosmoceratops Kosmoceratops Kosmoceratops is a genus of herbivorous chasmosaurine ceratopsian dinosaur, which lived during the Late Cretaceous period in the part of the island continent Laramidia that is now Utah, United States...	Cretaceous	herbivore	—
Kritosaurus Kritosaurus Kritosaurus is an incompletely known but historically important genus of hadrosaurid dinosaur. It lived about 73 million years ago, in the Late Cretaceous of North America...	Cretaceous	herbivore	—
Labocania Labocania Labocania is a genus of theropod, possibly tyrannosauroid, dinosaur from Baja California, Mexico, which lived 70 million years ago, in the Campanian stage of the late Cretaceous Period. The name references the "La Bocana Roja" Formation, which translates as "red lips". The type species, L....	Cretaceous	carnivore	—
Lambeosaurus Lambeosaurus Lambeosaurus is a genus of hadrosaurid dinosaur that lived about 76 to 75 million years ago, in the Late Cretaceous Period of North America. This bipedal/quadrupedal, herbivorous dinosaur is known for its distinctive hollow cranial crest, which in the best-known species resembled a hatchet...	Cretaceous	herbivore	—
Laosaurus Laosaurus Laosaurus is a genus of hypsilophodont dinosaur. The type species is Laosaurus celer, first described by O.C. Marsh in 1878 from remains from the Oxfordian-Tithonian-age Upper Jurassic Morrison Formation of Wyoming. The validity of this genus is doubtful because it is based on fragmentary fossils...	Jurassic/Cretaceous	herbivore	—
Leptoceratops Leptoceratops Leptoceratops , was a primitive ceratopsian dinosaur genus from the Late Cretaceous Period of what is now Western North America, at the same time as its giant...	Cretaceous	herbivore	—
Lophorhothon Lophorhothon Lophorhothon is a genus of hadrosauroid dinosaur from the Late Cretaceous, the first genus of dinosaur discovered in Alabama.-Discovery and naming:...	Cretaceous	herbivore	—
Madsenius Madsenius "Madsenius" is the name given to an as-yet undescribed genus of dinosaur from the Late Jurassic of North America, from the Morrison Formation. It was a theropod which may have been closely related to Allosaurus, or even a species of Allosaurus...	Jurassic	carnivore	—
Magulodon Magulodon "Magulodon" is the name given to an as yet undescribed genus of dinosaur from the Early Cretaceous . It was a possible ornithischian, either an ornithopod or basal ceratopsian, which lived in what is now Maryland, in the United States. The type species, "Magulodon muirkirkensis", was coined by...	Cretaceous	herbivore	—
Maiasaura Maiasaura Maiasaura is a large duck-billed dinosaur genus that lived in the area currently covered by the state of Montana in the Upper Cretaceous Period , about 74 million years ago....	Cretaceous	herbivore	—
Marshosaurus Marshosaurus Marshosaurus was a genus of medium sized theropod, with a size up to 5 or 6 meters in length and a skull about 60 cm long. It is known from parts of at least three individuals from the Morrison Formation of Utah and Colorado.The holotype is a left ilium, or upper pelvis bone found at the...	Jurassic	carnivore	—
Megapnosaurus Megapnosaurus Megapnosaurus was a dinosaur of the theropod family Coelophysidae, formerly called Syntarsus , living during the Early Jurassic. It was renamed by American entomologist Dr. Michael Ivie , Polish Australian Dr...	Jurassic	carnivore	Formerly known as Syntarsus
Medusaceratops Medusaceratops Medusaceratops is a genus of herbivorous ceratopsian dinosaur. It is a chasmosaurine ceratopsian which lived during the Late Cretaceous period in what is now Montana. It is known from two partial parietals, the holotype WDC DJR 001 and the paratype WDC DJR 002...	Cretaceous	herbivore	—
Microcephale Microcephale "Microcephale" is the informal name of a genus of very small pachycephalosaurid dinosaur, otherwise known as the "North American dwarf species", which lived during the Late Cretaceous. Its fossils were found in the late Campanian-age Dinosaur Park Formation, in Alberta, Canada...	Cretaceous	herbivore	—
Microvenator Microvenator Microvenator is a genus of dinosaur from the Early Cretaceous Cloverly Formation in what is now south central Montana. Microvenator was an oviraptorosaurian theropod. The holotype fossil is an incomplete skeleton, most likely a juvenile, with a living length of about four feet. The adult size of...	Cretaceous	carnivore	—
Moabosaurus Moabosaurus "Moabosaurus" is the informal name given to an as yet undescribed genus of dinosaur from the Early Cretaceous. It was possibly a camarasaurid sauropod, and was discovered in the Cedar Mountain Formation near Moab, Utah. The full binomial name, "Moabosaurus utahensis", first appeared in print in...	Cretaceous	herbivore	—
Mojoceratops Mojoceratops Mojoceratops is a genus of ceratopsian dinosaur. It is a chasmosaurine ceratopsian which lived during the Late Cretaceous period in what is now Western Canada...	Cretaceous	herbivore	—
Monoclonius Monoclonius Monoclonius was a ceratopsian dinosaur from the Judith River Formation of Late Cretaceous Montana and Canada. It is often confused with Centrosaurus, a similar genus of ceratopsian . Monoclonius was described by Edward Drinker Cope in 1876...	Cretaceous	herbivore	—
Montanoceratops Montanoceratops Montanoceratops was a genus of small ceratopsian dinosaur. It lived during the early Maastrichtian of the late Cretaceous Period...	Cretaceous	herbivore	—
Mymoorapelta Mymoorapelta Mymoorapelta is an ankylosaur from the Late Jurassic Morrison Formation of western Colorado. The taxon is known from portions of a disarticulated skull, parts of three different skeletons and other postcranial remains...	Jurassic	herbivore	—
Naashoibitosaurus Naashoibitosaurus Naashoibitosaurus is a genus of hadrosaurid dinosaur that lived about 73 million years ago, in the Late Cretaceous, and was found in the Kirtland Formation of the San Juan Basin in New Mexico, United States. Only a partial skeleton has been found to date...	Cretaceous	herbivore	—
Nanosaurus Nanosaurus Nanosaurus is the name given to a genus of dinosaur from the Late Jurassic. Described by Othniel Charles Marsh in 1877, it is a poorly-known ornithischian of uncertain affinities. Its fossils are known from the Morrison Formation of Colorado and possibly Wyoming...	Jurassic	herbivore (?)	—
Nanotyrannus Nanotyrannus Nanotyrannus is a genus of tyrannosaurid dinosaur, known only from two juvenile specimens, which may in fact represent juvenile specimens of the contemporary species Tyrannosaurus rex.-History:...	Cretaceous	carnivore	—
Nedcolbertia Nedcolbertia Nedcolbertia is a genus of dinosaur from the Early Cretaceous Period. It was a coelurosaur which lived in North America during the Barremian. Kirkland, Britt, Madsen and Burge in 1995 reported its discovery in the basal Cedar Mountain Formation in Utah. The type species, N...	Cretaceous	(unknown)	—
Nedoceratops	Cretaceous	herbivore	—
Niobrarasaurus Niobrarasaurus Niobrarasaurus is an extinct genus of nodosaurid ankylosaur which lived during the Cretaceous 87 to 82 million years ago. Its fossils were found in the Smoky Hill Chalk Member of the Niobrara Formation, in western Kansas, which would have been near the middle of Western Interior Sea during the...	Cretaceous	herbivore	—
Nodocephalosaurus Nodocephalosaurus Nodocephalosaurus is a genus of herbivorous ankylosaurine ankylosaurid dinosaur from Upper Cretaceous deposits of San Juan Basin, New Mexico. The holotype was recovered from the Late Campanian De-na-zin Member of the Kirtland Formation and consists of an incomplete skull...	Cretaceous	herbivore	—
Nodosaurus Nodosaurus Nodosaurus was a genus of herbivorous ankylosaurian dinosaur from the Late Cretaceous, the fossils of which are found in North America. Two incomplete specimens have been discovered in Wyoming and Kansas, and no skulls...	Cretaceous	herbivore	—
Nothronychus Nothronychus Nothronychus is a genus of theropod dinosaur classified in the group Therizinosauria, from the Cretaceous of North America.The type species of this dinosaur, Nothronychus mckinleyi, was described by James Kirkland and Douglas G. Wolfe in 2001...	Cretaceous	herbivore	—
Ojoceratops Ojoceratops Ojoceratops is a genus of ceratopsian dinosaur which lived in what is now New Mexico. Ojoceratops fossils have been recovered from strata of the Ojo Alamo Formation , dating to the late Cretaceous period . The type species is Ojoceratops fowleri...	Cretaceous	herbivore	—
Ojoraptorsaurus Ojoraptorsaurus Ojoraptorsaurus is a genus of oviraptorosaurian dinosaur from the late Cretaceous. Ojoraptorsaurus is known from the holotype SMP VP-1458 an incomplete pair of fused pubes found at the Naashoibito Member of the Ojo Alamo Formation dating from the early Maastrichtian, about 69 million years...	Cretaceous	carnivore	—
Orcomimus Orcomimus "Orcomimus" is the name given to an as yet undescribed genus of dinosaur from the Late Cretaceous period around 84–65 million years ago. The dinosaur was an ornithomimid which lived in what is now South Dakota, in the United States...	Cretaceous	carnivore	—
Ornatotholus	Cretaceous	herbivore	—
Ornitholestes Ornitholestes Ornitholestes was a small theropod dinosaur of the late Jurassic of Western Laurasia . To date, it is known only from a single partial skeleton, and badly crushed skull found at the Bone Cabin Quarry near Medicine Bow, Wyoming, in 1900...	Jurassic	carnivore	—
Ornithomimus Ornithomimus Ornithomimus is a genus of ornithomimid dinosaur from the Late Cretaceous Period of what is now North America.In 1890 Ornithomimus velox was named by Othniel Charles Marsh on the basis of a foot and partial hand from the Maastrichtian Denver Formation. Another seventeen species have been named since...	Cretaceous	herbivore	—
Orodromeus Orodromeus Orodromeus is a genus of herbivorous ornithopod dinosaur from the Late Cretaceous of North America.-Discovery and naming:...	Cretaceous	herbivore	—
Oryctodromeus Oryctodromeus Oryctodromeus was a genus of small ornithopod dinosaur. Fossils are known from the middle Cretaceous Blackleaf Formation of southwestern Montana and the Wayan Formation of southeastern Idaho, both of the Cenomanian stage, roughly 95 million years ago...	Cretaceous	herbivore	—
Osmakasaurus Osmakasaurus Osmakasaurus is a genus of herbivorous iguanodontian dinosaur. It is a basal iguanodontian which lived during the lower Cretaceous period in what is now Buffalo Gap of South Dakota, USA. It is known from the Chilson Member of the Lakota Formation. This genus was named by Andrew T. McDonald in 2011...	Cretaceous	herbivore	—
Othnielia Othnielia Othnielia is a genus of ornithischian dinosaur, named after its original describer, Professor Othniel Charles Marsh, an American paleontologist of the 19th century...	Jurassic	herbivore	—
Othnielosaurus Othnielosaurus Othnielosaurus is a genus of ornithischian dinosaur that lived about 155 to 148 million years ago, during the Late Jurassic-age Morrison Formation of the western United States. It is named in honor of famed paleontologist Othniel Charles Marsh, and was formerly assigned to the genus...	Jurassic	herbivore/omnivore	—
Pachycephalosaurus Pachycephalosaurus Pachycephalosaurus is a genus of pachycephalosaurid dinosaur. It lived during the Late Cretaceous Period of what is now North America. Remains have been excavated in Montana, South Dakota, and Wyoming. It was an herbivorous or omnivorous creature which is only known from a single skull and a few...	Cretaceous	herbivore	—
Pachyrhinosaurus Pachyrhinosaurus Pachyrhinosaurus is a genus of ceratopsid dinosaurs from the Late Cretaceous period of North America. The first examples were discovered by Charles M. Sternberg in Alberta, Canada, in 1946, and named in 1950. Over a dozen partial skulls and a large assortment of other fossils from various species...	Cretaceous	herbivore	—
Palaeopteryx Palaeopteryx Palaeopteryx is a genus of theropod dinosaur now considered a nomen dubium. It was named and misidentified by J. A. Jensen in 1981, then redescribed by Jensen and K. Padian in 1989. At that time the binomial Palaeopteryx thomsoni was deemed invalid by Jensen...	Jurassic	(unknown)	Dubious, see article
Palaeoscincus Palaeoscincus Palaeoscincus is a dubious genus of ankylosaurian dinosaur based on teeth from the mid-late Campanian-age Upper Cretaceous Judith River Formation of Montana...	Cretaceous	herbivore	—
Paluxysaurus Paluxysaurus Paluxysaurus is a genus of basal titanosauriform sauropod dinosaur from the late Aptian or early Albian-age Lower Cretaceous Twin Mountains Formation of Hood County, Texas, USA...	Cretaceous	herbivore	—
Panoplosaurus Panoplosaurus Panoplosaurus is a genus of nodosaurid dinosaur. It was one of the last known nodosaurids, living during the Late Cretaceous in what is now North America; fossils have been located in Alberta, Canada....	Cretaceous	herbivore	—
Parasaurolophus Parasaurolophus Parasaurolophus is a genus of ornithopod dinosaur that lived in what is now North America during the Late Cretaceous Period, about 76.5–73 million years ago. It was an herbivore that walked both as a biped and a quadruped. Three species are recognized: P. walkeri , P. tubicen, and the...	Cretaceous	herbivore	—
Parksosaurus Parksosaurus Parksosaurus was a genus of hypsilophodont ornithopod dinosaur from the early Maastrichtian-age Upper Cretaceous Horseshoe Canyon Formation of Alberta, Canada. It is based on most of a partially articulated skeleton and partial skull, showing it to have been a small, bipedal, herbivorous dinosaur...	Cretaceous	herbivore	—
Paronychodon Paronychodon Paronychodon was a theropod dinosaur genus. It is a tooth taxon, considered dubious because of the fragmentary nature of the fossils, which include "buckets" of teeth but no other remains...	Cretaceous	carnivore	—
Pawpawsaurus Pawpawsaurus Pawpawsaurus, meaning "Pawpaw Lizard", is a nodosaurid ankylosaur from the Cretaceous of Tarrant County, Texas, discovered in May 1992. The only species yet assigned to this taxon, Pawpawsaurus campbelli, is based on a complete skull from the marine Paw Paw Formation...	Cretaceous	herbivore	—
Peloroplites Peloroplites Peloroplites is a genus of nodosaurid armored dinosaur from Lower Cretaceous rocks of Utah...	Cretaceous	herbivore	—
Pentaceratops Pentaceratops Pentaceratops is a genus of ceratopsid dinosaur from the late Cretaceous Period of what is now North America. The appearance of Pentaceratops sternbergii in the fossil record marks the end of the Judithian land vertebrate age and the start of the Kirtlandian...	Cretaceous	herbivore	—
Planicoxa Planicoxa Planicoxa is a genus of advanced iguanodontian dinosaur from the Early Cretaceous of North America. It is known from the partial skeletons of several individual specimens. Its fossils were discovered in Utah and South Dakota, United States....	Cretaceous	herbivore	—
Pleurocoelus	Cretaceous	herbivore	—
Podokesaurus Podokesaurus Podokesaurus was a small carnivorous dinosaur of the Early Jurassic Period , and as such is one of the earliest known dinosaurs to inhabit the eastern United States . The small, bipedal carnivore was about 90 cm long and 0.3 m tall...	Jurassic	carnivore	—
Polyonax Polyonax Polyonax was a genus of ceratopsid dinosaur from the late Maastrichtian-age Upper Cretaceous Denver Formation of Colorado, USA...	Cretaceous	herbivore	—
Prenoceratops Prenoceratops Prenoceratops, is a genus of ceratopsian dinosaur from the Late Cretaceous Period. Its fossils have been found in the Two Medicine Formation in the present-day U.S. state of Montana...	Cretaceous	herbivore	—
Priconodon Priconodon Priconodon is an extinct genus of dinosaur , known from its large teeth. Its remains have been found in the Aptian-Albian age Lower Cretaceous Arundel Formation of Muirkirk, Prince George's County, Maryland.-History:...	Cretaceous	herbivore	—
Propanoplosaurus Propanoplosaurus Propanoplosaurus is a genus of herbivorous nodosaurid dinosaur from the Early Cretaceous Patuxent Formation of Maryland. Its type specimen is a natural cast and partial natural mold of a hatchling....	Cretaceous	herbivore	—
Prosaurolophus Prosaurolophus Prosaurolophus is a genus of hadrosaurid dinosaur from the Late Cretaceous of North America. It is known from the remains of at least 25 individuals belonging to two species, including skulls and skeletons, but it remains obscure...	Cretaceous	herbivore	—
Protoavis Protoavis Protoavis is a problematic taxon of archosaurian known from fragmentary remains from Late Triassic Norian stage deposits near Post, Texas. Much controversy remains over the animal, and there are many different interpretations of what Protoavis actually is...	Cretaceous	(unknown)	Dubious, see article
Protohadros Protohadros Protohadros is a genus of herbivorous ornithischian dinosaur from the Late Cretaceous , 95 million years ago....	Cretaceous	herbivore	—
Pteropelyx Pteropelyx Pteropelyx is a dubious genus of Late Cretaceous hadrosaurid dinosaur from the Judith River Formation of Montana, named by Edward Drinker Cope in 1889. Historically, several species were assigned to it, all based on extremely fragmentary remains, but there is no evidence to support these assignments...	Cretaceous	herbivore	—
Richardoestesia	Cretaceous	carnivore	—
Rubeosaurus Rubeosaurus Rubeosaurus is a genus of ceratopsian dinosaur which lived in what is now North America. Rubeosaurus fossils have been recovered from strata of the upper Two Medicine Formation of the Upper Cretaceous of Montana, dating to between 75 and 74 million years ago...	Cretaceous	herbivore	—
Sarahsaurus Sarahsaurus Sarahsaurus is a genus of basal sauropodomorph dinosaur which lived during the lower Jurassic period in what is now northeastern Arizona, USA....	Jurassic	omnivore	—
Saurolophus Saurolophus Saurolophus is a genus of large hadrosaurine duckbill that lived about 69.5-68.5 million years ago, in the Late Cretaceous of North America and Asia; it is one of the few genera of dinosaurs known from multiple continents. It is distinguished by a spike-like crest which projects up and back...	Cretaceous	herbivore	—
Sauropelta Sauropelta Sauropelta is a genus of nodosaurid dinosaur that existed in the Early Cretaceous Period of North America. One species has been named although others may have existed. Anatomically, Sauropelta is one of the most well-understood nodosaurids, with fossilized remains recovered in the U.S. states of...	Cretaceous	herbivore	—
Saurophaganax Saurophaganax Saurophaganax is a genus of allosaurid dinosaur from the Morrison Formation of Late Jurassic Oklahoma . Some paleontologists consider it to be a species of Allosaurus...	Jurassic	carnivore	—
Sauroposeidon Sauroposeidon Sauroposeidon is a genus of sauropod dinosaur known from four neck vertebrae that were found in the southeastern portion of the US state of Oklahoma. The fossils were found in rocks dating to the Early Cretaceous, a period when the sauropods of North America had diminished in both size and...	Cretaceous	herbivore	—
Saurornitholestes Saurornitholestes Saurornitholestes is a genus of carnivorous dromaeosaurid theropod dinosaur from the late Cretaceous of Alberta, Montana and New Mexico....	Cretaceous	carnivore	—
Scelidosaurus Scelidosaurus Scelidosaurus is a genus of quadrupedal, lightly plated, herbivorous dinosaur about long. It lived during the Early Jurassic Period, during the Hettangian to Sinemurian stages around 199.6 to 194 million years ago. Its fossils have been found in both England and in Arizona, in the United...	Jurassic	herbivore	—
Scutellosaurus Scutellosaurus Scutellosaurus is a genus of herbivorous dinosaur that lived in North America around 200 to 196 million years ago, in the Early Jurassic times....	Jurassic	herbivore	—
Segisaurus Segisaurus Segisaurus is a genus of small coelophysoid theropod dinosaur, that measured approximately 1 metre in length. The only known specimen was discovered in 1933 in early Jurassic strata in Tsegi Canyon, Arizona, for which it was named. Segisaurus is the only dinosaur to have ever been excavated from...	Jurassic	carnivore	—
Seitaad Seitaad Seitaad is a genus of sauropodomorph dinosaur which lived during the lower Jurassic period in what is now southern Utah, USA.Seitaad is known from an articulated partial postcranial holotype skeleton referred to as UMNH VP 18040. The skeleton is missing its head, neck and tail...	Jurassic	omnivore	—
Silvisaurus Silvisaurus Silvisaurus, from the Latin silva "woodland" and Greek saurus "lizard", is a nodosaurid ankylosaur from the middle Cretaceous of Kansas.-Discovery and species:...	Cretaceous	herbivore	—
Sonorasaurus Sonorasaurus Sonorasaurus is a genus of brachiosaurid dinosaur from the middle Cretaceous . It was a herbivorous sauropod whose fossils have been found in southern Arizona in the United States. Its name, which means "Sonora lizard", comes from the Sonoran Desert where its fossils were first found...	Cretaceous	herbivore	—
Sphaerotholus Sphaerotholus Sphaerotholus is a genus of pachycephalosaurid dinosaur from the Upper Cretaceous of the western United States. To date, two species have been described: the type species, S. goodwini, from the Den-na-zin Member of the Kirtland Formation of San Juan County, New Mexico, and a second species, S...	Cretaceous	herbivore	—
Stegoceras Stegoceras Stegoceras is a genus of plant-eating pachycephalosaurid dinosaur that lived in what is now North America during the Late Cretaceous period....	Cretaceous	herbivore	—
Stegopelta Stegopelta Stegopelta is a genus of armored dinosaur. It is based on a partial skeleton from the latest Albian-earliest Cenomanian-age Lower and Upper Cretaceous Belle Fourche Member of the Frontier Formation of Fremont County, Wyoming....	Cretaceous	herbivore	—
Stegosaurus Stegosaurus Stegosaurus is a genus of armored stegosaurid dinosaur. They lived during the Late Jurassic period , some 155 to 150 million years ago in what is now western North America. In 2006, a specimen of Stegosaurus was announced from Portugal, showing that they were present in Europe as well...	Jurassic	herbivore	—
Stokesosaurus Stokesosaurus Stokesosaurus is a genus of small , early tyrannosaur from the Late Jurassic period of Utah and England. It was named after Utah geologist William Lee Stokes...	Jurassic	carnivore	—
Struthiomimus Struthiomimus Struthiomimus is a genus of ornithomimid dinosaur from the late Cretaceous of Alberta, Canada. It was a long-legged, ostrich-like dinosaur.The bipedal Struthiomimus stood about long and tall at the hips and weighed around...	Cretaceous	herbivore/omnivore	—
Stygimoloch Stygimoloch Stygimoloch is a putative genus of pachycephalosaurid dinosaur from the end of the Cretaceous period, roughly 65 million years ago...	Cretaceous	herbivore	—
Styracosaurus Styracosaurus Styracosaurus was a genus of herbivorous ceratopsian dinosaur from the Cretaceous Period , about 76.5 to 75.0 million years ago...	Cretaceous	herbivore	—
Supersaurus Supersaurus Supersaurus is a genus of diplodocid sauropod dinosaur discovered by Vivian Jones of Delta, Colorado, in the Upper Jurassic Morrison Formation of Colorado in 1972. The fossil remains came from the Brushy Basin Member of the formation, dating to about 153 million years ago...	Jurassic	herbivore	—
Suuwassea Suuwassea Suuwassea is a genus of diplodocoid sauropod dinosaur found in the Upper Jurassic strata of the Morrison Formation, located in southern Carbon County, Montana, USA. The fossil remains were recovered in a series of expeditions during a period spanning the years 1999 and 2000, described by J.D....	Jurassic	herbivore	—
Talos Talos (dinosaur) Talos is an extinct genus of carnivorous bird-like theropod dinosaur, an advanced troodontid which lived during the late Cretaceous period in what is now Utah, USA....	Cretaceous	carnivore/omnivore	—
Tanycolagreus Tanycolagreus Tanycolagreus is a genus of coelurid theropod from the Late Jurassic of North America. The holotype is a partial skeleton recovered from the Bone Cabin Quarry West locality, Albany County, Wyoming, from the Morrison Formation...	Jurassic	carnivore	—
Tatankacephalus Tatankacephalus Tatankacephalus is a basal genus of ankylosaurid dinosaur that lived during the Early Cretaceous.Its fossil has been collected from the Cloverly Formation of central Montana during 1996, 1997 and 1998, in the region of the Middle Dome in Wheatland County. The type species is T. cooneyorum,...	Cretaceous	herbivore	—
Tatankaceratops Tatankaceratops Tatankaceratops is a controversial genus of herbivorous ceratopsian dinosaur. It is a small chasmosaurine ceratopsian which lived during the Late Cretaceous period in what is now South Dakota. It is known from a single partial skull which was collected from the Hell Creek Formation, dating to...	Cretaceous	herbivore	—
Tawa Tawa (dinosaur) Tawa is a genus of theropod dinosaur from the Late Triassic period. It is estimated to have been 2 m long...	Triassic	carnivore	—
Tenontosaurus Tenontosaurus Tenontosaurus is a genus of medium- to large-sized ornithopod dinosaur. The genus is known from the late Aptian to Albian ages of the middle Cretaceous period sediments of western North America, dating between 115 to 108 million years ago...	Cretaceous	herbivore	—
Teratophoneus Teratophoneus Teratophoneus is a genus of carnivorous tyrannosaurid theropod dinosaur which lived during the late Cretaceous period in what is now Utah, USA. It is known from an incomplete skull and postcranial skeleton recovered from the Kaiparowits Formation. Teratophoneus was named by Thomas D. Carr, Thomas E...	Cretaceous	carnivore	—
Texacephale Texacephale Texacephale is a genus of basal pachycephalosaurid dinosaur from the Campanian stage of the Late Cretaceous. The type species is Texacephale langstoni; its fossils were discovered in the Aguja Formation and described in 2010 by Longrich, Sankey and Tanke...	Cretaceous	herbivore	—
Texasetes Texasetes Texasetes is a genus of ankylosaurian dinosaur from the late Lower Cretaceous of North America. This poorly known genus has been recovered from the Paw Paw Formation near Haslet, Tarrant County Texas, which has also produced the nodosaurid ankylosaur Pawpawsaurus...	Cretaceous	herbivore	—
Theiophytalia Theiophytalia Theiophytalia is a genus of herbivorous iguanodontian dinosaur from the lower Cretaceous period of Colorado.-Etymology:...	Cretaceous	herbivore	—
Thescelosaurus Thescelosaurus Thescelosaurus was a genus of small ornithopod dinosaur that appeared at the very end of the Late Cretaceous period in North America. It was a member of the last dinosaurian fauna before the Cretaceous-Tertiary extinction event around 65.5 million years ago...	Cretaceous	herbivore	—
Thespesius Thespesius Thespesius is a dubious genus of hadrosaurid dinosaur from the late Maastrichtian-age Upper Cretaceous Lance Formation of South Dakota....	Cretaceous	herbivore	—
Tichosteus Tichosteus Tichosteus is a genus of herbivorous dinosaur from the Late Jurassic. It is known only from vertebrae recovered from Kimmeridgian rocks in the Morrison Formation, Colorado....	Jurassic	herbivore	—
Titanoceratops Titanoceratops Titanoceratops is a genus of herbivorous ceratopsian dinosaur. It was a giant chasmosaurine ceratopsian which lived during the Late Cretaceous period in what is now New Mexico, and the earliest known triceratopsin. It is known from the holotype OMNH 10165, a partial skeleton including...	Cretaceous	herbivore	—
Torosaurus Torosaurus Torosaurus is a genus of ceratopsid dinosaur that lived during the late Cretaceous period , between 70 and 65 million years ago. It possessed one of the largest skulls of any known land animal. The frilled skull reached in length...	Cretaceous	herbivore	—
Torvosaurus Torvosaurus Torvosaurus is a genus of large theropod dinosaur that lived during the Late Jurassic period...	Jurassic	carnivore	—
Trachodon Trachodon Trachodon is a dubious genus of hadrosaurid dinosaur based on teeth from the Campanian-age Upper Cretaceous Judith River Formation of Montana, U.S.A...	Cretaceous	herbivore	Dubious, see article
Triceratops Triceratops Triceratops is a genus of herbivorous ceratopsid dinosaur which lived during the late Maastrichtian stage of the Late Cretaceous Period, around 68 to 65 million years ago in what is now North America. It was one of the last dinosaur genera to appear before the great Cretaceous–Paleogene...	Cretaceous	herbivore	—
Troodon Troodon Troodon is a genus of relatively small, bird-like dinosaur from the Late Cretaceous period . Discovered in 1855, it was among the first dinosaurs found in North America...	Cretaceous	carnivore	Includes Stenonychosaurus, Polyodontosaurus, and Pectinodon.
Tyrannosaurus Tyrannosaurus Tyrannosaurus meaning "tyrant," and sauros meaning "lizard") is a genus of coelurosaurian theropod dinosaur. The species Tyrannosaurus rex , commonly abbreviated to T. rex, is a fixture in popular culture. It lived throughout what is now western North America, with a much wider range than other...	Cretaceous	carnivore	—
Utahceratops Utahceratops Utahceratops is a genus of herbivorous ceratopsian dinosaur. It is a chasmosaurine ceratopsian which lived during the Late Cretaceous period in what is now Utah. Its fossils have been recovered from the Kaiparowits Formation. It was first named by Scott D. Sampson, Mark A. Loewen, Andrew A....	Cretaceous	herbivore	—
Utahraptor Utahraptor Utahraptor is a genus of theropod dinosaurs, including the largest known members of the family Dromaeosauridae. Fossil specimens date to the upper Barremian stage of the early Cretaceous period...	Cretaceous	carnivore	—
Uteodon Uteodon Uteodon is a genus of herbivorous iguanodontian dinosaur. It is a basal iguanodontian which lived during the upper Jurassic period in what is now Uintah County, Utah. It is known from the middle of the Brushy Basin Member, Morrison Formation. This genus was named by Andrew T. McDonald in 2011 and...	Jurassic	herbivore	—
Vagaceratops Vagaceratops Vagaceratops is a genus of herbivorous ceratopsian dinosaur. It is a chasmosaurine ceratopsian which lived during the Late Cretaceous period in what is now Alberta. Its fossils have been recovered from the Upper Dinosaur Park Formation...	Creataceous	herbivore	—
Velafrons Velafrons Velafrons is a genus of lambeosaurine hadrosaurid dinosaur from the Late Cretaceous of Mexico. It is known from a mostly complete skull and partial skeleton of a juvenile individual, with a bony crest on the forehead...	Cretaceous	herbivore	—
Venenosaurus Venenosaurus Venenosaurus named after the Poison Strip Member of the Cedar Mountain Formation in Utah, where the fossils were discovered by a Denver Museum of Natural History volunteer Tony DiCroce in 1998. Venenosaurus dicrocei was first described as a new species in 2001 by Virginia Tidwell, Kenneth...	Cretaceous	herbivore	—
Wyomingraptor Wyomingraptor "Wyomingraptor" is the name unofficially ascribed to an allosaurid dinosaur from the Morrison Formation of the Late Jurassic. The few remains unearthed are labeled as Allosaurus in the Tate Museum. Robert Bakker, who discovered the fossils in 1997, has proposed the new name...	Jurassic	carnivore	—
Zephyrosaurus Zephyrosaurus Zephyrosaurus is a genus of hypsilophodont ornithopod dinosaur. It is based on a partial skull and postcranial fragments discovered in the Aptian-Albian-age Lower Cretaceous Cloverly Formation of Carbon County, Montana...	Cretaceous	herbivore	—
Zuniceratops Zuniceratops Zuniceratops was a ceratopsian dinosaur from the mid Turonian of the Late Cretaceous Period of what is now New Mexico, United States...	Cretaceous	herbivore	—

Key

Nomen dubium Nomen dubium In zoological nomenclature, a nomen dubium is a scientific name that is of unknown or doubtful application...

Invalid

Nomen nudum Nomen nudum The phrase nomen nudum is a Latin term, meaning "naked name", used in taxonomy...

Timeline

This is a timeline of selected dinosaurs from the list above. Time is measured in Ma, megaannum, along the x-axis.

Criteria for inclusion

• The creature must appear on the List of dinosaurs.
• Fossils of the creature must have been found in North America
  North America
  North America is a continent wholly within the Northern Hemisphere and almost wholly within the Western Hemisphere. It is also considered a northern subcontinent of the Americas...
  
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• This list is a complement to :Category:Dinosaurs of North America.