This list of eurypterids is an attempt to create a comprehensive listing of all genera

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...

 that have ever been included in the subclass Eurypterida, excluding purely vernacular terms. The list includes all commonly accepted genera, but also genera that are now considered invalid, doubtful (nomina dubia

Nomen dubium

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

), or were not formally published (nomina nuda

Nomen nudum

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

), as well as junior synonyms of more established names, and genera that are no longer considered eurypterids.

The list includes 81 genera, all of them extinct.

Naming conventions and terminology

Naming conventions and terminology follow the International Code of Zoological Nomenclature

International Code of Zoological Nomenclature

The International Code of Zoological Nomenclature is a widely accepted convention in zoology that rules the formal scientific naming of organisms treated as animals...

. Technical terms used include:

• Junior synonym: A name which describes the same taxon as a previously published name. If two or more genera are formally designated and the type specimens are later assigned to the same genus, the first to be published (in chronological order) is the senior synonym, and all other instances are junior synonyms. Senior synonyms are generally used, except by special decision of the ICZN, but junior synonyms cannot be used again, even if deprecated. Junior synonymy is often subjective, unless the genera described were both based on the same type specimen.
• Nomen nudum
  Nomen nudum
  The phrase nomen nudum is a Latin term, meaning "naked name", used in taxonomy...
  
   (Latin for "naked name"): A name that has appeared in print but has not yet been formally published by the standards of the ICZN. Nomina nuda (the plural form) are invalid, and are therefore not italicized as a proper generic name would be. If the name is later formally published, that name is no longer a nomen nudum and will be italicized on this list. Often, the formally published name will differ from any nomina nuda that describe the same specimen.
• Nomen oblitum
  Nomen oblitum
  A nomen oblitum is a technical term, used in zoological nomenclature, for a particular kind of disused scientific name....
  
   (Latin for "forgotten name"): A name that has not been used in the scientific community for more than fifty years after its original proposal.
• Preoccupied name: A name that is formally published, but which has already been used for another taxon. This second use is invalid (as are all subsequent uses) and the name must be replaced. As preoccupied names are not valid generic names, they will also go unitalicized on this list.
• Nomen dubium
  Nomen dubium
  In zoological nomenclature, a nomen dubium is a scientific name that is of unknown or doubtful application...
  
   (Latin for "dubious name"): A name describing a fossil with no unique diagnostic features. As this can be an extremely subjective and controversial designation, this term is not used on this list.

Genera list

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Genus	Authors	Year	Status	Age	Location
Acutiramus Acutiramus Acutiramus is an extinct genus of eurypterid which lived in the Late Silurian to Early Devonian.Acutiramus was one of the largest eurypterids with pincers 5 cm and length about 2 m...	Ruedemann	1935 1935 in paleontology -Dinosaurs:* Charles Gilmore returned to prospect for fossils in the Two Medicine Formation.-New taxa:-Non-mammalian:-References:* Trexler, D., 2001, Two Medicine Formation, Montana: geology and fauna: In: Mesozoic Vertebrate Life, edited by Tanke, D. H., and Carpenter, K., Indiana University...	valid	Prid. lDev.
Adelophthalmus	Jordan & Meyer	1856	valid	uDev. lPerm.
Alkenopterus	Størmer	1974 1974 in paleontology -Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-New taxa:-Non-mammalian:-References:...	valid	lDev.
Angustidontus	Cooper	1936 1936 in paleontology -Insects:-Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-New taxa:-Non-mammalian:...	valid
Baltoeurypterus	Størmer	1973 1973 in paleontology -Insects:-Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-New taxa:-Non-mammalian:...	valid	Wen. Prid.
Bassipterus	Kjellesvig-Waering Leutze	1966 1966 in paleontology -Newly named mesosaurs:-Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-Non-mammalian:...	valid	Prid.
Belinuropsis	Matthew	1909 1909 in paleontology -Newly named dinosaurs:Data coutersy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-New taxa:-Non-mammalian:-People:...	valid
Brachopterella			valid	Prid.
Brachyopterus Brachyopterus Brachyopterus is a genus of prehistoric eurypterid of the family Rhenopteridae.-Description:Brachyopterus is distinguished by its small size, compound eyes with axes converging anteriorly on a subtrapezoid to subpentagonal prosoma...	Størmer	1951 1951 in paleontology -Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-Non-mammalian:...	valid	uOrd.
Buffalopterus	Kjellesvig-Waering Heubusch	1962 1962 in paleontology -Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-Non-mammalian:...	valid	Prid.
Campulocephalus			valid		typo?
Campylocephalus Campylocephalus Campylocephalus is a genus of prehistoric eurypterid of the Family Hibbertopteridae.-Description:Campylocephalus is distinguished by its prosoma , which is subsemicircular and strongly convex, with subcentral compound eyes separated by inflated lobes. Its abdominal tergites are convex, with...	Eichwald	1860 1860 in paleontology -New taxa:-New taxa:-Non-mammalian:...	valid	Miss.
Carcinosoma Carcinosoma Carcinosoma is a genus of an extinct arthropod. Up to 30 cm long, these eurypterids were found in New York and in other states of the United States. It is from the Late Silurian.-Description:...	Claypole	1890 1890 in paleontology -Dinosaurs:-Newly named plesiosaurs:-Pteridophyta:...	valid	Lud. lDev.
Clarkeipterus			valid	Prid.
Ctenopterus Ctenopterus Ctenopterus is a genus of prehistoric eurypterid of the Family Stylonuridae. It contains only one species.-Description:Stylonurids, which lived from the Ordovician to Lower Permian periods, were small to very large forms with scales developing into tubercules and knobs. The prosoma exhibited...	Clarke Ruedemann	1912 1912 in paleontology -Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-Non-mammalian:...	valid	Wen.
Curviramus	Ruedemann	1935 1935 in paleontology -Dinosaurs:* Charles Gilmore returned to prospect for fossils in the Two Medicine Formation.-New taxa:-Non-mammalian:-References:* Trexler, D., 2001, Two Medicine Formation, Montana: geology and fauna: In: Mesozoic Vertebrate Life, edited by Tanke, D. H., and Carpenter, K., Indiana University...	valid
Dolichocephala	Macquart	1823	valid
Dolichopterus Dolichopterus Dolichopterus is a genus of the prehistoric sea scorpions, arthropods in the order Eurypterida.-Distribution:It lived in the Late Silurian in shelf or epicontinental seas of the region where Avalonia, Baltica and Laurentia met during the Caledonian orogeny; its fossils have been found in...	Hall	1859	valid	Wen. lDev.
Dorfopterus	Erik N. Kjellesvig-Waering	1955 1955 in paleontology -Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-Pteridophyta:-References:...	valid	lDev.
Drepanopterus Drepanopterus Drepanopterus is an extinct genus of eurypterid. There are currently two species assigned to the genus. The genus has in the past been assigned its own family, with nine species associated with the genus Drepanopterus, however five of these have since been proven to be synonyms of pre-existing...	Laurie	1892	valid	Lland. lDev.
Dunsopterus	Waterston	1968 1968 in paleontology -New taxa:-Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-New taxa:...	valid	Miss.
Echinognathus Echinognathus Echinognathus is a genus of prehistoric eurypterid in the Family Megalograptidae. Echinognathus is known from the Ordovician.-Description:...	Walcott	1882 1882 in paleontology -Dinosaurs:-Non-mammalian:-Paleontologists:* The fossil collection of the recently deceased Reverend William Fox, which contained over 500 specimens, was bought by the trustees of the British Museum of Natural History....	valid	uOrd.
Eidothea Eidothea Eidothea is a genus of two species of rainforest tree in New South Wales and Queensland in eastern Australia, which belongs to the plant family Proteaceae, which also includes more familiar members such as the waratahs, grevilleas, banksias, macadamias and proteas...	Scouler	1831 1831 in paleontology -Paleontologists:* Birth of Othniel Charles Marsh on October 29th; noted for naming many dinosaur families and genera, including Apatosaurus and Allosaurus....	valid
Eocarcinosoma			valid	uOrd.
Erettopterus Erettopterus Erettopterus is a genus of prehistoric eurypterid. It was related to another large eurypterid, Pterygotus.-Description:Pterygotidae, which lived from the Ordovician to Devonian periods, were characterized by small to large exoskeletons with semilunar scales. The telson, was expanded, or flatter...	Salter	1859	valid	Lland. lDev.
Erieopterus			valid	Wen. lDev.
Eurypterus Eurypterus Eurypterus is an extinct genus of sea scorpions. They existed during the Silurian Period, from around 432 to 418 million years ago.There are fifteen species belonging to the genus Eurypterus, the most common of which is Eurypterus remipes, the first eurypterid fossil discovered and the state...	De Kay	1825 1825 in paleontology -Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database....	valid	Lland. lDev.
Glaucodes	Pruvost	1923 1923 in paleontology -Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-New taxa:-Non-mammalian:...	valid
Glyptoscorpius	Peach	1882 1882 in paleontology -Dinosaurs:-Non-mammalian:-Paleontologists:* The fossil collection of the recently deceased Reverend William Fox, which contained over 500 specimens, was bought by the trustees of the British Museum of Natural History....	valid
Grossopterus Grossopterus Grossopterus is a genus of prehistoric eurypterid of the Family Waeringopteridae.-Species:Two species are currently classified under the genus:*Grossopterus Størmer, 1934 **Grossopterus overathi — Devonian, Germany...	Størmer	1934 1934 in paleontology -Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-Non-mammalian:...	valid	lDev.
Hallipterus	Kjellesvig-Waering	1963 1963 in paleontology -Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-Non-mammalian:...	valid	uDev.
Hardieopterus	Waterson	1979 1979 in paleontology -Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-New taxa:-Non-mammalian:-References:...	valid	Lland. Prid.
Hastimima Hastimima Hastimima is a genus of prehistoric eurypterid of the Family Hibbertopteridae. It contains only one species, Hastimima whitei, recovered from the Permian period of Brazil....	White	1908 1908 in paleontology -Newly named dinosaurs:Data coutersy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-New taxa:-Non-mammalian:...	valid	Cis.
Hibbertopterus Hibbertopterus Hibbertopterus is a genus of giant sea scorpion that inhabited the swamps of Scotland during the Carboniferous.Hibbertopterus is a member of the family Hibbertopteridae, large bizarre Eurypterids found from the Upper Devonian to the end of the Permian period...			valid	Miss.
Himantopterus			valid
Holmipterus			valid	Wen.
Hughmilleria Hughmilleria Hughmilleria is a genus of Silurian eurypterid. The genus name commemorates the Scottish geologist Hugh Miller.-Stratigraphy and ecology:Fossils of Hughmilleria have been found in Silurian deposits from the Llandovery and Ludlow epochs...	Sarle	1902 1902 in paleontology -Crurotarsi:-Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-Prolacertiformes:...	valid	Lud.
Jaekelopterus			valid	lDev.
Kiaeropterus			valid	Lland. Lud.
Kokomopterus			valid	Prid.
Lamontopterus			valid	Lland.
Lanarkopterus			valid	Wen. Lud.
Laurieopterus			valid	Lland.
Laurieipterus			valid
Lepidoderma Lepidoderma Adelophthalmus is a genus of prehistoric eurypterid of the family Adelophthalmidae.-Description:Adelophthalmus is distinguishable by its elongate body, with spurs on the segments; its walking legs, which lack spines; and its long styliform telson.-Species:Adelophthalmus Jordan in Jordan & von...	Reuss	1855 1855 in paleontology -Newly named dinosaurs:-Newly named Prolacertiformes:-Newly named plesiosaurs:-Museums:* The Albany Museum of Grahamstown, South Africa is established....	valid
Mazonipterus			valid
Megalograptus Megalograptus Megalograptus is a Ordovician eurypterid , and was among the earliest known genera . The generic name is derived from the fact that its first fossils were of its very spiny legs, which were mistaken for massive graptolites. It lived from 460 to 445 mya...			valid	uOrd.
Melbournopterus Melbournopterus Melbournopterus is a genus of prehistoric chelicerate, known from the Upper Silurian of Australia. It is of uncertain taxonomic placement within the subphylum Chelicerata.-Description:...			valid
Moselopterus			valid
Mixopterus Mixopterus Mixopterus is a genus of a eurypterid. It belongs to the family Mixopteridae.-Description:Mixopterus were characterised by a robust exoskeletons with scattered tubercles or semicircular scales. The prosoma was subquadrate, protruding antemedially. The chelicerae were small...			valid	Wen. Prid.
Moselopterus			valid	lDev. mDev.
Mycterops Mycterops Mycterops is a genus of prehistoric eurypterid of the Family Mycteroptidae. Mycterops lived in the Carboniferous period in Europe and North America.-Description:...	Cope	1886 1886 in paleontology -Dinosaurs:-New taxa:-Non-mammalian:...	valid
Nanahughmilleria			valid	Lud. lDev.
Onychopterella Onychopterella Onychopterella is a genus of prehistoric eurypterid in the Family Eurypteridae.- Description :Eurypteridae, which lived from the Ordovician to the Late Carboniferous period, were characterized by small to large exoskeletons with inconspicuous semilunar scales or curved ridges. The telson, was...	Stoermer	1951 1951 in paleontology -Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-Non-mammalian:...	valid	Prid.
Onychopterus			preoccupied	N/A	N/A
Orcanopterus			valid
Pagea			valid	lDev.
Paracarcinosoma			valid	Wen. lDev.
Parahughmillera			valid	Lland. lDev.
Parastylonurus			valid	Prid.
Pittsfordipterus			valid	Prid.
Pterygotus Pterygotus Pterygotus is the second-largest known eurypterid, or sea scorpion and one of the largest arthropods of all time.-Description:...			valid	Lud. uDev.
Rhenopterus Rhenopterus Rhenopterus is an extinct prehistoric eurypterid. Rhenopterus lived in the Lower Devonian period in Europe and possibly North America.-Description:...	Størmer	1936 1936 in paleontology -Insects:-Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-New taxa:-Non-mammalian:...	valid	lDev. uDev.
Rhinocarcinosoma Rhinocarcinosoma Rhinocarcinosoma is a genus of Silurian eurypterid, with a triangular carapace, laterally positioned eyes, and a curved telson. In 2002, a new species was described from the Dô Son Formation of the Dô Son Peninsula of northern Vietnam.-Species:...	Novojilov	1962 1962 in paleontology -Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-Non-mammalian:...	valid	Lud.
Ruedemannipterus			valid	uOrd. Wen.
Salteropterus Salteropterus Salteropterus is a genus of prehistoric eurypterid of the family Slimonidae. Salteropterus lived in the Silurian period, and specimens have been recovered in Britain.-Description:...	Kjellesvig-Waering	1951 1951 in paleontology -Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-Non-mammalian:...	valid	Prid.
Slimonia Slimonia Slimonia is a genus of Silurian eurypterid roughly similar to the genus Pterygotus. Slimonia resembled Pterygotus, save that the former's telson is larger, and that its body was smaller and more slender than the latter. Unlike Pterygotus, which lived in estuaries, Slimonia species lived...	Page	1856 1856 in paleontology -Newly named dinosaurs:-Paleontologists:* Death of William Buckland, the polymath who was the first to scientifically describe a dinosaur....	valid	Lland. Prid.
Strobilopterus Strobilopterus Strobilopterus is a genus of prehistoric eurypterid of the family Dolichopteridae.-Description:Dolichopterids, which lived in the Silurian and Devonian periods, were medium-sized, and had outer surfaces that were either smooth with pustules and semilunar scales. Their compound eyes were arcuate...	Ruedemann	1935 1935 in paleontology -Dinosaurs:* Charles Gilmore returned to prospect for fossils in the Two Medicine Formation.-New taxa:-Non-mammalian:-References:* Trexler, D., 2001, Two Medicine Formation, Montana: geology and fauna: In: Mesozoic Vertebrate Life, edited by Tanke, D. H., and Carpenter, K., Indiana University...	valid	lDev.
Stylonurella			valid	Lland.
Stylonuroides			valid	Lud.
Stylonurus Stylonurus Stylonurus is a genus of prehistoric eurypterid of the Family Stylonuridae.-Description:Stylonurids, which lived from the Ordovician to Lower Permian periods, were small to very large forms with scales developing into tubercules and knobs. The prosoma exhibited variable shape, with arcuate...	Page	1856 1856 in paleontology -Newly named dinosaurs:-Paleontologists:* Death of William Buckland, the polymath who was the first to scientifically describe a dinosaur....	valid	lDev.
Syntomopterus			valid	lDev.
Tarsopterella Tarsopterella Tarsopterella is a genus of prehistoric eurypterid of the Family Hardieopteridae. It contains only one species.-Description:Tarsopterella is distinguished by its prosoma , which is subrectangular and slightly concave in front, with small compound eyes. Its abdomen has pronounced lateral epimera...	Stoermer	1951 1951 in paleontology -Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-Non-mammalian:...	valid	Prid. lDev.
Tarsopterus	Clarke and Ruedemann	1912 1912 in paleontology -Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-Non-mammalian:...	preoccupied	N/A	N/A
Truncatiramus			valid	Wen. Prid.
Tylopterella Tylopterella Tylopterella is a genus of prehistoric eurypterid which lived from the Ordovician to the Upper Carboniferous period. It is of uncertain taxonomic placement within the order Eurypterida.-Description:...	Stoermer	1951 1951 in paleontology -Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-Non-mammalian:...	valid	Lud.
Tylopterus	Clarke and Ruedemann	1912 1912 in paleontology -Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-Non-mammalian:...	preoccupied	N/A	N/A
Unionopterus	Chernyshev	1948 1948 in paleontology -Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-New taxa:-Non-mammalian:...	valid
Vernopterus	Waterson	1968 1968 in paleontology -New taxa:-Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-New taxa:...	valid
Waeringopterus	Leutze	1961 1961 in paleontology -Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-Non-mammalian:...	valid	Prid. lDev.
Willwerathia	Størmer	1969 1969 in paleontology -New taxa:-Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-New taxa:-Non-mammalian:...	valid	lDev.
Woodwardopterus	Kjellesvig-Waering	1959 1959 in paleontology -Newly named dinosaurs:Data courtesy of George Olshevsky's dinosaur genera list and Dr. Jeremy Montague's dinosaur genus database.-New taxa:-New taxa:...	valid

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Classification in detail

As an addition to the data above, a provisional list of all published eurypterid species (including synonyms and misidentified fossils) is presented below.

• EURYPTERIDA Burmeister, 1843
  • =GIGANTOSTRACA Haeckel, 1866
  • =CYRTOCTENIDA Størmer & Waterston, 1968

• STYLONURINA Diener, 1924
• HIBBERTOPTEROIDEA Kjellesvig-Waering, 1959
• CYRTOCTENIDAE Waterston, Oelofsen & Oosthuizen, 1985
• Cyrtoctenus Størmer & Waterston, 1968
  • Cyrtoctenus caledonicus (Salter, 1863) — Carboniferous, Scotland
  • Cyrtoctenus dewalquei (Fraipont, 1889) — Devonian, Belgium
    • = Eurypterus dewalquei var. longimanus Fraipont, 1889
  • Cyrtoctenus dicki (Peach, 1883) — Carboniferous Thurso, Scotland
  • Cyrtoctenus ostraviensis (Augusta & Přibyl, 1951) — Carboniferous, Czech Republic
  • Cyrtoctenus peachi Størmer & Waterston, 1968 — Carboniferous, Scotland
  • Cyrtoctenus wittebergensis Waterston, Oelofsen & Oosthuizen, 1985 — Carboniferous, South Africa
• Dunsopterus Waterston, 1968
  • Dunsopterus stevensoni (Etheridge Jr, 1877) — Carboniferous, Scotland
• Hastimima White, 1908
  • Hastimima whitei White, 1908 — Permian, Brazil

• HIBBERTOPTERIDAE Kjellesvig-Waering, 1959
• Campylocephalus Eichwald, 1860
  • Campylocephalus oculatus (Kutorga, 1838) — Permian, Russia
  • ?Campylocephalus salmi Stur, 1877 — Carboniferous, Czech Republic
• Hibbertopterus Kjellesvig-Waering, 1959
  • ?Hibbertopterus hibernicus (Baily, 1872) — Carboniferous, Ireland
  • Hibbertopterus permianus Ponomarenko, 1985 — Permian, Russia
  • Hibbertopterus scouleri (Hibbert, 1836) — Carboniferous, Scotland
• Vernonopterus Waterston, 1957
  • Vernonopterus minutisculptus (Peach, 1907) — Carboniferous, Scotland

• WOODWARDOPTERIDAE Kjellesvig-Waering, 1959
• Megarachne Hünicken, 1980
  • Megarachne servinei Hünicken, 1980 — Carboniferous – Permian, Argentina
• Mycterops Cope, 1886 Carboniferous
  • ?Mycterops blairi Waterston, 1968 — Carboniferous, Scotland
  • Mycterops matthieui Pruvost, 1924 — Carboniferous, Belgium
  • Mycterops ordinatus Cope, 1886 — Carboniferous, USA
  • ?Mycterops whitei Schram, 1984 — Carboniferous, USA
• Woodwardopterus Kjellesvig-Waering, 1959
  • Woodwardopterus scabrosus (Woodward, 1887) — Carboniferous, Scotland

• STYLONUROIDEA Kjellesvig-Waering, 1959
• STYLONURIDAE Diener, 1924
• Kiaeropterus Waterston, 1979 Silurian
  • Kiaeropterus cyclophthalmus (Laurie, 1892) — Silurian, Scotland
  • Kiaeropterus ruedemanni (Størmer, 1934) — Silurian, Norway
• Stylonurella Kjellesvig-Waering, 1966
  • Stylonurella ?arnoldi (Ehlers, 1935) — Devonian, USA
  • Stylonurella ?beecheri (Hall, 1884) — Devonian, USA
  • Stylonurella spinipes (Page, 1859) — Silurian, Scotland
    • = Stylonurus logani Woodward, 1872 Silurian, Scotland
• Stylonurus Page, 1856 Devonian
  • Stylonurus powriensis Page, 1856 — Devonian, Scotland
    • = Stylonurus ensiformis Woodward, 1864 — Devonian Scotland
• ?Stylonurus shaffneri Willard, 1933 — Devonian, USA

• DREPANOPTERIDAE Kjellesvig-Waering, 1966
• Drepanopterus Laurie, 1892
  • Drepanopterus abonensis Simpson, 1951 — Devonian, England
  • Drepanopterus pentlandicus Laurie, 1892 — Silurian, Scotland

• PARASTYLONURIDAE Waterston, 1979
• Brachyopterus Størmer, 1951
  • Brachyopterus stubblefieldi Størmer, 1951 — Ordovician, Montgomeryshire
• Parastylonurus Kjellesvig-Waering, 1966
  • Parastylonurus hendersoni Waterston, 1979 — Silurian, Scotland
  • Parastylonurus ornatus (Laurie, 1892) — Silurian, Scotland
  • ?Parastylonurus sigmoidalis Kjellesvig-Waering, 1971 — Silurian Shropshire
• Stylonuroides Kjellesvig-Waering, 1966
• Stylonuroides dolichopteroides (Størmer, 1934) — Silurian, Norway

• LAURIEIPTERIDAE Kjellesvig-Waering, 1966
• Ctenopterus Clarke & Ruedemann, 1912
  • Ctenopterus cestrotus (Clarke, 1907) — Silurian, USA
• Laurieipterus Kjellesvig-Waering, 1966
  • Laurieipterus elegans (Laurie, 1899) — Silurian, Scotland
• Pagea Waterston, 1962 Devonian
  • Pagea sturrocki Waterston, 1962 — Devonian , Scotland
  • Pagea symondsii (Salter, 1859) — Devonian, Scotland

• KOKOMOPTERIDAE Kjellesvig-Waering, 1966
• Kokomopterus Kjellesvig-Waering, 1966
  • Kokomopterus longicaudatus (Clarke & Ruedemann, 1912) — Silurian, USA
• Lamontopterus Waterston, 1979
  • Lamontopterus knoxae (Lamont, 1955) — Silurian, Scotland

• HARDIEOPTERIDAE Tollerton, 1989
• Hallipterus Kjellesvig-Waering, 1963
  • Hallipterus excelsior (Hall, 1884) — Devonian, New York
    • = Dolichocephala lacoana Claypole, 1883 — Devonian, USA
• Hardieopterus Waterston, 1979
  • ?Hardieopterus lanarkensis Waterston, 1979 — Silurian, Scotland
  • Hardieopterus macrophthalmus (Laurie, 1892) — Silurian, Scotland
  • Hardieopterus megalops (Salter, 1859) — Silurian, England
  • Hardieopterus myops (Clarke, 1907) — Silurian, USA
• Tarsopterella Størmer, 1951
  • Tarsopterella scotica (Woodward, 1872) — Devonian, Scotland
    • = ?Erieopterus brewsteri Woodward, 1864 — Devonian, Scotland
    • = Stylonurus armatus Page, 1867 — Devonian, Scotland

• BRACHYOPTERELLIDAE Tollerton, 1989
• Brachyopterella Kjellesvig-Waering, 1966
  • Brachyopterella pentagonalis (Størmer, 1934) — Silurian, Norway
  • Brachyopterella ritchiei Waterston, 1979 — Silurian, Scotland
• Clarkeipterus Kjellesvig-Waering, 1966
  • Clarkeipterus ?otisius (Clarke, 1907) — Silurian, USA
  • Clarkeipterus testudineus (Clarke & Ruedeman, 1912) — Silurian, USA

• RHENOPTERIDAE Størmer, 1951
• = ALKENOPTERIDAE Poschmann & Tetlie, 2004
• Alkenopterus Størmer, 1974
  • Alkenopterus brevitelson Størmer, 1974— Devonian, Germany
  • Alkenopterus burglahrensis Poschmann & Tetlie, 2004 — Devonian, Germany
• Rhenopterus Størmer, 1936
  • Rhenopterus diensti Størmer, 1936 — Devonian, Germany
    • = Rhenopterus latus Størmer, 1936 — Devonian, Germany
  • Rhenopterus macrotuberculatus Størmer, 1974 — Devonian, Germany
  • Rhenopterus tuberculatus Størmer, 1936 — Devonian, Germany

• EURYPTERINA Burmeister, 1843
• Plesion taxa
• Moselopterus Størmer, 1974
  • Moselopterus ancylotelson Størmer, 1974 — Devonian, Germany
  • Moselopterus elongatus Størmer, 1974 — Devonian, Germany
  • Moselopterus lancmani (Delle, 1937) — Devonian, Latvia
• Onychopterella Størmer, 1951
  • Onychopterella augusti Braddy, Aldridge & Theron, 1995 — Ordovician, South Africa
  • Onychopterella kokomoensis (Miller & Gurley, 1896) — Silurian, USA
    • = Eurypterus ranilarva Clarke & Ruedemann, 1912 — Silurian, USA
  • ?Onychopterella pumilus (Savage, 1916) — Silurian, USA
• Vinetopterus Poschmann & Tetlie, 2004
  • Vinetopterus martini Poschmann & Tetlie, 2004 — Devonian, Germany
  • Vinetopterus struvei (Størmer, 1974) — Devonian, Germany
• Plesion taxa currently assigned to Drepanopterus
  • ?Drepanopterus bembycoides Laurie, 1899 — Silurian, Scotland
  • ?Drepanopterus conicus Laurie, 1892 — Silurian, Scotland
  • ?Drepanopterus latus (Størmer, 1934) — Silurian, Norway
  • ?Drepanopterus lobatus Laurie, 1899 — Silurian, Scotland
  • ?Drepanopterus nodosus Kjellesvig-Waering & Leutze, 1966 — Silurian, USA

• MEGALOGRAPTOIDEA Caster & Kjellesvig-Waering, 1955
• MEGALOGRAPTIDAE Caster & Kjellesvig-Waering, 1955
• Echinognathus Walcott, 1882
  • Echinognathus clevelandi (Walcott, 1882) — Ordovician, USA
• Megalograptus Miller, 1874
  • Megalograptus alveolatus (Shuler, 1915) — Ordovician, USA
  • Megalograptus ohioensis Caster & Kjellesvig-Waering, 1955 — Ordovician, USA
  • Megalograptus shideleri Caster & Kjellesvig-Waering, 1964 — Ordovician, USA
  • Megalograptus welchi Miller, 1874 — Ordovician, USA
  • Megalograptus williamsae Caster & Kjellesvig-Waering, 1964 — Ordovician, USA

• EURYPTEROIDEA Burmeister, 1843
• DOLICHOPTERIDAE Kjellesvig-Waering & Størmer, 1952
• Dolichopterus Hall, 1859
  • Dolichopterus gotlandicus Kjellesvig-Waering, 1979 — Silurian, Sweden
  • Dolichopterus jewetti Caster & Kjellesvig-Waering, 1956 — Silurian, USA
  • Dolichopterus macrocheirus Hall, 1859 — Silurian, USA, Canada
  • Dolichopterus siluriceps Clarke & Ruedemann, 1912 — Silurian, USA, Canada
  • ?Dolichopterus stoermeri Caster & Kjellesvig-Waering, 1956 — Silurian, Estonia
• Ruedemannipterus Kjellesvig-Waering, 1966
  • Ruedemannipterus stylonuroides (Clarke & Ruedemann, 1912) — Silurian, USA
• Buffalopterus Kjellesvig-Waering & Heubusch, 1962
  • Buffalopterus pustulosus (Hall, 1859) — Silurian, USA & Canada
    • = Eurypterus giganteus Pohlman, 1882 — Silurian, USA & Canada
    • = Pterygotus globicaudatus Pohlman, 1882 — Silurian, USA & Canada
• Strobilopterus Ruedemann, 1935
  • Strobilopterus princetonii (Ruedemann, 1934) — Devonian, USA
• Syntomopterus Kjellesvig-Waering, 1961
  • Syntomopterus richardsoni Kjellesvig-Waering, 1961 — Devonian, USA

• EURYPTERIDAE Burmeister, 1843
• Eurypterus de Kay, 1825
• = Baltoeurypterus Størmer, 1973
  • ?Eurypterus cephalaspis Salter, 1856 — Silurian, England
  • Eurypterus dekayi Hall, 1859 — Silurian, USA & Canada
  • Eurypterus flintstonensis Swartz, 1923 — Silurian, USA
  • Eurypterus hankeni Tetlie, 2006 — Silurian, Norway
  • Eurypterus henningsmoeni (Tetlie, 2002) — Silurian, Norway
  • Eurypterus laculatus Kjellesvig-Waering, 1958 — Silurian, USA & Canada
  • Eurypterus lacustris Harlan, 1834 — Silurian, USA & Canada
    • = Eurypterus pachycheirus Hall, 1859 — Silurian, USA & Canada
    • = Eurypterus robustus Hall, 1859 — Silurian, USA & Canada
  • Eurypterus leopoldi Tetlie, 2006 — Silurian, Canada
  • Eurypterus megalops Clarke & Ruedemann, 1912 — Silurian, USA
  • ?Eurypterus minor Laurie, 1899 — Silurian, Scotland
  • Eurypterus ornatus Leutze, 1958 — Silurian, USA
  • Eurypterus pittsfordensis Sarle, 1903 — Silurian, USA
  • Eurypterus quebecensis Kjellesvig-Waering, 1958 — Silurian, Canada
  • Eurypterus remipes DeKay, 1825 — Silurian, USA, Canada
    • = Carcinosoma trigona (Ruedemann, 1916) — Silurian, USA
  • Eurypterus serratus (Jones & Woodward, 1888) — Silurian, Sweden
  • Eurypterus tetragonophthalmus Fischer, 1839 — Silurian, Ukraine
    • = Eurypterus fischeri Eichwald, 1854 — Silurian, Ukraine
    • = Eurypterus fischeri var. rectangularis Schmidt, 1883 — Silurian, Estonia

• ERIEOPTERIDAE Tollerton, 1989
• Erieopterus Kjellesvig-Waering, 1958
  • Erieopterus eriensis (Whitfield, 1882) — Silurian, USA
  • Erieopterus hypsophthalmus Kjellesvig-Waering, 1958 — Silurian, USA
  • ?Erieopterus laticeps (Schmidt, 1883) — Silurian, Norway
  • Erieopterus latus Ruedemann, 1935 — Devonian, USA
  • ?Erieopterus limuloides (Kjellesvig-Waering, 1948) — Silurian, USA
  • Erieopterus microphthalmus (Hall, 1859) — Devonian, USA & Canada
  • ?Erieopterus phillipsensis Copeland, 1971 — Silurian. Canada
  • ?Erieopterus statzi Størmer, 1936 —Devonian, Germany
  • ?Erieopterus turgidus Stumm & Kjellesvig-Waering, 1962 — Silurian, USA

• MIXOPTEROIDEA Caster & Kjellesvig-Waering, 1955
• CARCINOSOMATIDAE Størmer, 1934
• Carcinosoma Claypole, 1890
  • ?Carcinosoma harleyi Kjellesvig-Waering, 1961 — Silurian ,England
  • Carcinosoma libertyi Copeland & Bolton, 1960 — Silurian, Canada
  • Carcinosoma newlini Claypole, 1890 — Silurian, USA
    • = Carcinosoma ingens Claypole, 1894 — Silurian, USA
  • ?Carcinosoma punctatum (Salter in Huxley & Salter, 1859) — Silurian ,England
  • Carcinosoma scorpioides (Woodward, 1868) — Silurian, Scotland
    • = Pterygotus raniceps Woodward, 1868 — Silurian, Scotland
  • Carcinosoma scoticus (Laurie, 1899) — Silurian, Scotland
  • ?Carcinosoma spiniferumKjellesvig-Waering & Heubusch, 1962 — Silurian, USA
• Eocarcinosoma Caster & Kjellesvig-Waering, 1964
  • Eocarcinosoma batrachophthalmus Caster & Kjellesvig-Waering, 1964 — Ordovician, USA

• MIXOPTEROIDEA Caster & Kjellesvig-Waering, 1955 (cont.)
• CARCINOSOMATIDAE Størmer, 1934 (cont.)
• Paracarcinosoma Caster & Kjellesvig-Waering, 1964
  • Paracarcinosoma acrocephalus (Semper, 1898) — Silurian – Devonian Barrandian area
  • Paracarcinosoma obesus (Woodward, 1868) — Silurian, Scotland
  • Paracarcinosoma scorpionis (Grote & Pitt, 1875) — Silurian, USA, Canada
• Rhinocarcinosoma Novojilov, 1962
  • Rhinocarcinosoma cicerops (Clarke, 1907) — Silurian, USA
  • Rhinocarcinosoma dosonensis Braddy, Selden & Doan Nhat, 2002 — Silurian, Vietnam
  • Rhinocarcinosoma vaningeni (Clarke & Ruedemann, 1912) — Silurian, USA

• MIXOPTERIDAE Caster & Kjellesvig-Waering, 1955
• = LANARKOPTERIDAE Tollerton, 1989
• Lanarkopterus Ritchie, 1968
  • Lanarkopterus dolichoschelus (Størmer, 1936) — Silurian, Scotland
• Mixopterus Ruedemann, 1921
  • Mixopterus kiaeri Størmer, 1934 — Silurian, Norway
  • Mixopterus multispinosus (Clarke & Ruedemann, 1912) — Silurian, USA
  • Mixopterus simonsoni Schmidt, 1883 — Silurian, Estonia

• WAERINGOPTEROIDEA author, date?
• families? NB: the superfamily name appears to be derived from a family group name proposed in a thesis
• Grossopterus Størmer, 1934
  • Grossopterus overathi (Gross, 1933) — Devonian, Germany
  • Grossopterus inexpectans (Ruedemann, 1921) — Devonian, USA
• Orcanopterus Stott, Tetlie, Braddy, Nowlan, Glasser & Devereux, 2005
  • Orcanopterus manitoulinensis Stott, Tetlie, Braddy, Nowlan, Glasser & Devereux, 2005 — Ordovician, Canada
• Waeringopterus Leutze, 1961
  • Waeringopterus apfeli Leutze, 1961 — Silurian, Canada
  • Waeringopterus cumberlandicus (Swartz, 1923) — Silurian, USA
    • = Eurypterus swartzi Kjellesvig-Waering, 1958 — Silurian, USA

• ADELOPHTHALMOIDEA Tollerton, 1989
• ADELOPHTHALMIDAE Tollerton, 1989
• Adelopthalmus Jordan in Jordan & von Mayer, 1854
• = Lepidoderma Reuss, 1855
• = Anthraconectes Meek & Worthen, 1868
• = Polyzosternites Goldenberg, 1873
• = Glyptoscorpius Peach, 1882
  • Adelophthalmus approximatus (Hall & Clarke, 1888) — Carboniferous, USA
  • Adelophthalmus asturica (Melendez, 1971) — Carboniferous, Spain
  • Adelophthalmus bradorensis (Bell, 1922) — Carboniferous, New Zealand
  • Adelophthalmus cambieri (Pruvost, 1930) — Carboniferous, Belgium
  • ?Adelophthalmus carbonarius (Chernyshev, 1933) — Carboniferous, Ukraine
  • Adelophthalmus chinensis (Grabau, 1920) — Carboniferous – Permian, China
  • Adelophthalmus corneti (Pruvost, 1939) — Carboniferous, Belgium
  • Adelophthalmus douvillei (de Lima, 1890) — Permian Bussaco, Portugal
  • Adelophthalmus dumonti (Stainier, 1917) — Carboniferous, Belgium
  • Adelophthalmus granosus Jordan in Jordan & von Meyer, 1854 — Carboniferous, Germany
  • Adelophthalmus imhofi (Reuss, 1855) — Carboniferous, Czech Republic
  • Adelophthalmus irinae Shpinev, 2006 — Carboniferous, Russia
  • Adelophthalmus kidstoni (Peach, 1888) — Carboniferous, England
  • ?Adelophthalmus lohesti (Dewalque in Fraipont 1889) — Devonian, Belgium
  • Adelophthalmus luceroensis Kues & Kietzke, 1981 — Permian, USA
  • Adelophthalmus mansfieldi (Hall, 1877) — Carboniferous, USA
    • = Eurypterus stylus Hall, 1884 — Carboniferous Pennsylvania, USA
  • Adelophthalmus mazonensis (Meek & Worthen, 1868) — Carboniferous, USA
  • Adelophthalmus moyseyi (Woodward, 1907) — Carboniferous, Wales
    • = Eurypterus derbiensis Woodward, 1907 — Carboniferous, England
  • Adelophthalmus nebraskensis (Barbour, 1914) — Permian, USA
  • Adelophthalmus pennsylvanicus (Hall, 1877) — Carboniferous, USA
  • ?Adelophthalmus ?perornatus (Peach, 1882) — Carboniferous, Scotland
  • Adelophthalmus pruvosti Kjellesvig-Waering, 1948 — Carboniferous, France
  • ?Adelophthalmus raniceps Goldenberg, 1873 — Carboniferous, Germany
  • Adelophthalmus sellardsi (Dunbar, 1924) — Permian, USA
  • Adelophthalmus sievertsi (Størmer, 1969) — Devonian, Germany
    • = ?Eurypterus trapezoides Størmer, 1974 — Devonian, Germany
  • Adelophthalmus waterstoni (Tetlie et al., 2004) — Devonian, Australia
  • Adelophthalmus wilsoni (Woodward, 1888) — Carboniferous, England
  • Adelophthalmus zadrai Přibyl, 1952 — Carboniferous, Poland / Czech Republic
• Bassipterus Kjellesvig-Waering & Leutze, 1966
  • Bassipterus virginicus Kjellesvig-Waering & Leutze, 1966 — Silurian, USA
• Eysyslopterus Tetlie & Poschmann, 2008
  • Eysyslopterus patteni (Størmer, 1934) — Silurian, Estonia
• Nanahughmilleria Kjellesvig-Waering, 1961
  • Nanahughmilleria clarkei Kjellesvig-Waering, 1964b — Silurian, USA
  • Nanahughmilleria norvegica (Kiær, 1911) — Silurian, Norway
    • = Eurypterus minutus Kiær, 1911 — Silurian, Norway
  • ?Nanahughmilleria prominens (Hall, 1884) — Silurian, USA
  • Nanahughmilleria pygmaea (Salter, 1859) — Silurian, England
  • ?Nanahughmilleria schiraensis (Pirozhnikov, 1957) — Devonian, Russia
• Parahughmilleria Kjellesvig-Waering, 1961
  • Parahughmilleria bellistriata (Kjellesvig-Waering, 1950) — Silurian, USA
  • Parahughmilleria hefteri Størmer, 1973 — Devonian, Germany
  • Parahughmilleria maria (Clarke, 1907) — Silurian, USA
  • Parahughmilleria matarakensis (Pirozhnikov, 1957) — Devonian, Russia
  • Parahughmilleria salteri Kjellesvig-Waering, 1961 — Silurian, England
• Pittsfordipterus Kjellesvig-Waering & Leutze, 1966
  • Pittsfordipterus phelpsae (Ruedemann, 1921) — Silurian, USA

• PTERYGOTIOIDEA Clarke & Ruedemann, 1912
• HUGHMILLERIIDAE Kjellesvig-Waering, 1951
• Herefordopterus Tetlie, 2006b
  • Herefordopterus banksii (Salter, 1856) — Silurian, England
    • = Eurypterus acuminatus Salter, 1859a — Silurian, England
• Hughmilleria Sarle, 1903
  • Hughmilleria shawangunk Clarke, 1907 — Silurian, USA
  • Hughmilleria socialis Sarle, 1903 — Silurian, USA
    • = Hughmilleria robusta Sarle, 1903 — Silurian, USA
  • Hughmilleria wangi Tetlie, Selden & Ren, 2007 — Silurian, China

• SLIMONIDAE Novojilov, 1968
• Salteropterus Kjellesvig-Waering, 1951
  • Salteropterus abbreviatus (Salter, 1859) — Silurian, England
• Slimonia Page, 1856
  • Slimonia acuminata Salter, 1856 — Silurian, Scotland
    • = Himantopterus maximus Salter, 1856 — Silurian, Scotland
  • Slimonia boliviana Kjellesvig-Waering, 1973 — Silurian, Bolivia
  • Slimonia dubia Laurie, 1899 — Silurian, Scotland

• PTERYGOTIDAE Clarke & Ruedemann, 1912
• = JAEKELOPTERIDAE Størmer, 1974
• Acutiramus Ruedemann, 1935
  • Acutiramus bohemicus (Barrande, 1872) — Silurian, Czech Republic
    • = Pterygotus comes Barrande, 1872 — Silurian, Czech Republic
    • = Pterygotus mediocris Barrande, 1872 — Silurian, Czech Republic
    • = Pterygotus blahai Semper, 1898 — Silurian, Czech Republic
    • = Pterygotus fissus Seemann, 1906 — Silurian, Czech Republic
  • Acutiramus cummingsi (Grote & Pitt, 1875) — Silurian USA & Canada
    • = Pterygotus acuticaudatus Pohlman, 1882 — Silurian, USA
    • = Pterygotus buffaloensis Pohlman, 1881 — Silurian, USA
    • = Pterygotus quadraticaudatus Pohlman, 1882 — Silurian, USA
  • Acutiramus floweri Kjellesvig-Waering & Caster, 1955 — Silurian, USA
  • Acutiramus macrophthalmus (Hall, 1859) — Silurian USA & Canada
    • = Pterygotus osborni Hall, 1859 — Silurian , USA
    • = Pterygotus cobbi var. juvenis Clarke & Ruedemann, 1912 — Silurian, USA
  • Acutiramus perneri Chlupáč, 1994 — Devonian, Czech Republic
  • Acutiramus perryensis Leutze, 1958 — Silurian, USA
  • Acutiramus suwanneensis Kjellesvig-Waering, 1955 — Silurian?, USA
• Erettopterus Salter in Huxley & Salter, 1859
  • Erettopterus bilobus (Salter, 1856) — Silurian, Scotland
    • = Eurypterus perornatus Salter, 1856 — Silurian , Scotland
    • = Pterygotus bilobus var. acidens Woodward, 1878 — Silurian , Scotland
    • = Pterygotus bilobus var. crassus Woodward, 1878 — Silurian, Scotland
    • = Pterygotus bilobus var. inornatus Woodward, 1878 — Silurian, Scotland
    • = Pterygotus bilobus var. perornatus Woodward, 1878 — Silurian, Scotland
    • = Pterygotus perornatus var. plicatissimus Salter in Huxley & Salter, 1859 — Silurian, Scotland
  • Erettopterus brodiei Kjellesvig-Waering, 1961 — Silurian, England
  • Erettopterus canadensis (Dawson, 1879) — Silurian, Canada
  • Erettopterus exophthalmus Kjellesvig-Waering & Leutze, 1966 — Silurian, USA
  • Erettopterus gigas Salter in Huxley & Salter, 1859 — Silurian, England
  • Erettopterus globiceps Clarke & Ruedemann, 1912 — Silurian, USA
  • Erettopterus grandis Pohlman, 1881 — Silurian, USA
  • Erettopterus holmi (Størmer, 1934) — Silurian, Norway
  • Erettopterus laticauda Schmidt, 1883 — Silurian, Estonia
  • Erettopterus marstoni Kjellesvig-Waering, 1961 — Silurian, England
  • Erettopterus megalodon Kjellesvig-Waering, 1961 — Silurian, England
  • Erettopterus osiliensis Schmidt, 1883 — Siluria, Estonia,
  • Erettopterus saetiger Kjellesvig-Waering, 1964 — Silurian, USA
  • Erettopterus serratus Kjellesvig-Waering, 1961 — Devonian, USA
  • Erettopterus spatulatus Kjellesvig-Waering, 1961 — Silurian, England
  • ?Erettopterus vogti Størmer, 1934a — Devonian, Norway
  • Erettopterus waylandsmithi Kjellesvig-Waering & Caster, 1955 — Silurian, USA
• Jaekelopterus Waterston, 1964
  • Jaekelopterus rhenaniae (Jaekel, 1914) — Devonian, Germany
• Pterygotus Agassiz, 1839
  • Pterygotus anglicus Agassiz, 1844 — Devonian, Scotland & Canada
    • = Pterygotus atlanticus Clarke & Ruedemann, 1912 — Devonian, Canada
    • = Pterygotus minor Woodward, 1864 — Devonian , Scotland
  • Pterygotus arcuatus Salter in Huxley & Salter, 1859 — Devonian, England
  • ?Pterygotus australis McCoy, 1899 — Silurian, Australia
  • Pterygotus barrandei Semper, 1898 — Silurian, Czech Republic
    • = Pterygotus beraunensis Semper, 1898 — Silurian, Czech Republic
  • Pterygotus bolivianus Kjellesvig-Waering, 1964 — Devonian, Bolivia
  • Pterygotus carmani Kjellesvig-Waering, 1961 — Devonian, USA
  • Pterygotus cobbi Hall, 1859 — Silurian, USA, Canada
  • Pterygotus denticulatus Kjellesvig-Waering, 1961 — Silurian, England
  • Pterygotus floridanus Kjellesvig-Waering, 1950 — Devonian, USA
  • Pterygotus gaspesiensis Russell, 1953 — Devonian, Canada
  • ?Pterygotus grandidentatus Kjellesvig-Waering, 1961 — Silurian England
  • ?Pterygotus howelli Kjellesvig-Waering & Størmer, 1952 — Devonian, USA
  • ?Pterygotus impacatus Kjellesvig-Waering, 1964a — Silurian, Estonia
  • Pterygotus kopaninensis Barrande, 1872 — Silurian, Czech Republic
  • Pterygotus lanarkensis Kjellesvig-Waering, 1964 — Silurian, Scotland
  • Pterygotus lightbodyi Kjellesvig-Waering, 1961 — Silurian England
  • Pterygotus ludensis Salter in Huxley & Salter, 1859 — Silurian, England
  • Pterygotus marylandicus Kjellesvig-Waering, 1964 — Silurian, USA
  • Pterygotus monroensis Sarle 1902 — Silurian, USA
  • ?Pterygotus sarlei Ciurca & Tetlie, 2007 — Silurian, USA
  • ?Pterygotus ventricosus Kjellesvig-Waering, 1948 — Silurian, USA

• EURYPTERIDA incertae sedis
• Dorfopterus Kjellesvig-Waering, 1955
  • Dorfopterus angusticollis Kjellesvig-Waering, 1955 — Devonian, USA
• ?Dolichopterus
  • ?Dolichopterus asperatus Kjellesvig-Waering, 1961 — Devonian, USA
  • ?Dolichopterus bulbosus Kjellesvig-Waering, 1961 — Silurian, England
  • ?Dolichopterus herkimerensis Caster & Kjellesvig-Waering, 1956 — Silurian ,USA & Canada
• ?Eurypterus
  • ?Eurypterus loi Chang, 1957 [non eurypterid?] — Silurian, China
  • ?Eurypterus podolicus Chernyshev, 1947 — Silurian Ukraine
  • ?Eurypterus satpaevi Simorin, 1956 — Carboniferous, Kazakhstan
  • ?Eurypterus styliformis Chang, 1957 [non eurypterid?] — Silurian, China
  • ?Eurypterus tschernyschevi Simorin, 1956 — Carboniferous, Kazakhstan
  • ?Eurypterus yangi Chang, 1957 [non eurypterid?] — Silurian, China
• Holmipterus Kjellesvig-Waering, 1979
  • Holmipterus suecicus Kjellesvig-Waering, 1979 — Silurian, Sweden
• Marsupipterus Caster & Kjellesvig-Waering, 1955
  • Marsupipterus sculpturatus Caster & Kjellesvig-Waering, 1955 — Silurian, England
• ?Nanahughmilleria
  • ?Nanahughmilleria lanceolata Salter, 1856 — Silurian, Scotland
    • = Eurypterus chartarius Salter, 1859 — Silurian, Scotland
    • = Eurypterus linearis Salter, 1859 — Silurian, Scotland
• ?Salteropterus
  • ?Salteropterus longilabium Kjellesvig-Waering, 1961 — Silurian, England
• ?Stylonurus
  • ?Stylonurus perspicillum Størmer, 1969 — Devonian, Germany
• Tylopterella Størmer, 1951
  • Tylopterella boylei (Whiteaves, 1884) — Silurian, Canada
  • ?Tylopterella menneri (Novojilov, 1959) — Devonian, Russia
• Unionopterus Chernyshev, 1948
  • Unionopterus anastasiae Chernyshev, 1948 — Carboniferous, Kazakhstan

Dubious and invalid taxa

Nomina dubia

• Bunodella horrida Matthew, 1888 [non Xiphosura] — Silurian, Canada
• ?Dunsopterus wrightianus Dawson 1881 — Devonian, USA
• Eurypterella ornata Matthew, 1888 — Carboniferous, Canada
• Eurypterus potens Hall, 1884 — Carboniferous, USA
• Eurypterus pulicaris Salter, 1863 — Devonian, Canada
• Hastimima sewardi Strand, 1926 — Devonian South Africa
• ?Pterygotus formosus Dawson, 1871 — Devonian, Canada
• Pterygotus nobilis Barrande, 1872 — S Barrandian area
• Pterygotus siemiradzkii Strand, 1926 — Devonian, Ukraine
• Pterygotus taurinus Salter, 1868 — Silurian, UK
• ?Slimonia stylops Salter in Huxley & Salter, 1859 — Silurian, England

Nomina nuda

• Baltoeurypterus latus Hanken & Størmer, 1975 — Silurian, Norway
• Pterygotus mcgrewi Kjellesvig-Waering, 1986 — Devonian, USA

Nomina vana

• Pterygotus problematicus Agassiz, 1844 — Silurian, UK

Misidentifications

• Buffalopterus verrucosus Kjellesvig-Waering & Heubusch, 1962 [crustacean] — Ordovician, USA
• Carcinosoma ?logani(Williams, 1915) [crustacean] — Silurian, Canada
• Eurypterus (Stylonurus?) maccarthyi Kjellesvig-Waering, 1934 [cephalopod] — Devonian, USA
• Eurypterus pugioBarrande, 1872 [crustacean] — Silurian, Czech Republic
• Eurypterus thomasi Walter, 1924 [aglaspidid] — Cambrian, USA
• Kockurus grandis Chlupáč, 1995 [?aglaspidid] — Cambrian, Czech Republic
• Kodymirus vagans Chlupáč & Havlíček, 1965 [?aglaspidid] — Cambrian, Czech Republic
• Mazonipterus cyclophthalmusKjellesvig-Waering, 1963b [plant] — Carboniferous, USA
• Pterygotus expectatus Barrande, 1872 [crustacean] — Silurian, Czech Republic
• Pterygotus (Curviramus) elleri Ruedemann, 1935 [crustacean] — Devonian, USA
• Pterygotus (Curviramus) montanensis Ruedemann, 1935 [crustacean] — Devonian, USA
• Pterygotus (Leptocheles) leptodactylum M’Coy, 1849 [crustacean] — Silurian, England

Pseudofossil

Pseudofossil

Pseudofossils are inorganic objects, markings, or impressions that might be mistaken for fossils. Pseudofossils may be misleading, as some types of mineral deposits can mimic lifeforms by forming what appear to be highly detailed or organized structures. One common example is when manganese oxides...

s

• Brachyopterella magna (Clarke & Ruedemann, 1912) — Ordovician, USA
• ?Carcinosoma linguata (Clarke & Ruedemann, 1912) — Ordovician, USA
• ?Carcinosoma longiceps (Clarke & Ruedemann, 1912) — Ordovician, USA
• Dolichopterus antiquus Ruedemann, 1942 — Ordovician, USA
• Dolichopterus frankfortensis (Clarke & Ruedemann, 1912) — Ordovician, USA
• Dolichopterus insolitusRuedemann, 1926 — Ordovician, USA
• ?Dolichopterus stellatus (Clarke & Ruedemann, 1912) — Ordovician, USA
• ?Drepanopterus ruedemanni (O’Connell, 1916) — Ordovician, USA
• ?Eocarcinosoma breviceps (Ruedemann, 1926) — Ordovician, USA
• Eocarcinosoma ruedemanni (Flower, 1945) — Ordovician, USA
• Eocarcinosoma triangulatus (Clarke & Ruedemann, 1912) — Ordovician, USA
• Erettopterus walcotti (Ruedemann, 1926) — Ordovician, USA
• Erieopterus chadwicki (Clarke & Ruedemann, 1912) — Ordovician, USA
• Erieopterus hudsonicus (Ruedemann, 1934) — Ordovician, USA
• ?Eurypterus decepiens (Ruedemann, 1942) — Ordovician, USA
• Eurypterus indicus Dubey, 1985 — Precambrian, India
• ?Eurypterus pristinus (Clarke & Ruedemann, 1912) — Ordovician, USA
• Eurypterus vermai Dubey, 1985 — Precambrian, India
• Hughmilleria chiplonkariDubey, 1985 — Precambrian, India
• Hughmilleria kilfoylei Ruedemann, 1934 — Ordovician, USA
• Hughmilleria prisca Ruedemann, 1934 — Ordovician, USA
• Hughmilleria uticana Ruedemann, 1926 — Ordovician, USA
• Parastylonurus rusti (Ruedemann, 1926) — Ordovician, USA
• Pterygotus deepkillensisRuedemann, 1934 — Ordovician, USA
• Pterygotus nasutusClarke & Ruedemann, 1912 — Ordovician, USA
• ?Pterygotus normanskillensis Clarke & Ruedemann, 1912 — Ordovician, USA
• Ruedemannipterus breviceps (Clarke & Ruedemann, 1912) — Ordovician, USA
• Ruedemannipterus latifrons(Clarke & Ruedemann, 1912) — Ordovician, USA
• Stylonurella modestus (Clarke & Ruedemann, 1912) — Ordovician, USA
• Stylonuroides limbatus (Clarke & Rudemann, 1912) — Ordovician, USA
• ?Waeringopterus pristinus (Ruedemann, 1942) — Ordovician, USA
• Waeringopterus prolificus (Clarke & Ruedemann, 1912) — Ordovician, USA

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