La Boca Formation - AbsoluteAstronomy.com

The La Boca Formation is a geological formation in Mexico

Mexico

The United Mexican States , commonly known as Mexico , is a federal constitutional republic in North America. It is bordered on the north by the United States; on the south and west by the Pacific Ocean; on the southeast by Guatemala, Belize, and the Caribbean Sea; and on the east by the Gulf of...

. It dates back to 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....

Vertebrate fauna

Vertebrate Vertebrate Vertebrates are animals that are members of the subphylum Vertebrata . Vertebrates are the largest group of chordates, with currently about 58,000 species described. Vertebrates include the jawless fishes, bony fishes, sharks and rays, amphibians, reptiles, mammals, and birds... s of the La Boca Formation
Genus	Species	Location	Stratigraphic position	Abundance	Notes	Images
Bocaconodon	B. tamaulipensis				A basal Mammaliaform
Bocatherium Williston Samuel Wendell Williston Samuel Wendell Williston was an American educator and paleontologist who was the first to propose that birds developed flight cursorially , rather than arboreally . He was also an entomologist, specialising in Diptera.-Early life:Williston was born in Boston, Massachusetts to Samuel Williston and... proposed the Sphenodontia to include only tuatara and their closest fossil relatives in 1925.	B. mexicanum				A Tritylodontid
Unnamed Ceratosaur
Unnamed Crocodyliforms
Cynosphenodon Cynosphenodon Cynosphenodon is an extinct genus of the family Sphenodontidae from the Middle Jurassic La Boca Formation of Tamaulipas, Mexico. Growth patterns in the teeth of Cynosphenodon suggest its close relationship with the modern tuatara....	C. huizachalensis				A Sphenodont
Dimorphodon Dimorphodon Dimorphodon was a genus of medium-sized pterosaur from the early Jurassic Period. It was named by paleontologist Richard Owen in 1859. Dimorphodon means "two-form tooth", derived from Greek δι/di meaning 'two', μορφη/morphe meaning 'shape' and οδων/odon meaning 'tooth', referring to the fact that...	D. weintraubi				A Pterosaur Pterosaur Pterosaurs were flying reptiles of the clade or order Pterosauria. They existed from the late Triassic to the end of the Cretaceous Period . Pterosaurs are the earliest vertebrates known to have evolved powered flight...
Indeterminate Heterodontosaurid remains
Huasteconodon	H. wiblei				A Gobiconodont Gobiconodontidae The Gobiconodontidae are a group of extinct mammals from the Early Creataceous, belonging to the triconodonts.- Phylogeny :Cladogram after Marisol Montellano, James A. Hopson, James M. Clark and Gao et al. .-References:...
Possible indeterminate Sauropod remains
Unnamed Mammaliaforms (IGM 6622,IGM 6855, and IGM 6856)
Sphenovipera	S. jimmysjoyi				A venomous Sphenodont
Tamaulipasaurus	T. morenoi				A strange burrowing Diapsid Diapsid Diapsids are a group of reptiles that developed two holes in each side of their skulls, about 300 million years ago during the late Carboniferous period. Living diapsids are extremely diverse, and include all crocodiles, lizards, snakes, and tuatara...
Indeterminate Theropod remains
Victoriaconodon	V. inaequalis				A Triconodontid Triconodontidae Triconodontidae is an extinct family of actively mobile mammal, endemic to what would be North America, Europe, and Africa during the Jurassic through Cretaceous periods from 155.7—70.6 mya, existing for approximately .-Taxonomy:...
Zapatadon Zapatadon Zapatadon was a sphenodontid reptile from the end of the Early Jurassic La Boca Formation of Tamaulipas, Mexico.-Classification:Zapatadon was closely related to Cynosphenodon, Homoeosaurus, Sapheosaurus, Ankylosphenodon, Pamazinsaurus, and the modern Tuatara....	Z. ejidoensis				A dwarf Sphenodont

Vertebrate fauna

See also