La Boca Formation

La Boca Formation Stratigraphic range: ?Middle Jurassic
Type	Geological formation
Unit of	Huizachal Formation
Underlies	La Joya Formation
Location
Region	Tamaulipas
Country	Mexico

The La Boca Formation is a geological formation in Mexico. It dates back to the Middle Jurassic.^[1]

Vertebrate fauna

Vertebrates of the La Boca Formation
Genus	Species	Location	Stratigraphic position	Abundance	Notes	Images
Bocaconodon[2]	B. tamaulipensis[2]				A basal Mammaliaform[2]
Bocatherium[3] Williston proposed the Sphenodontia to include only tuatara and their closest fossil relatives in 1925.[3]	B. mexicanum[3]				A Tritylodontid[3]
Unnamed Ceratosaur[1]
Unnamed Crocodyliforms[3]
Cynosphenodon	C. huizachalensis				A Sphenodont
Dimorphodon	D. weintraubi				A Pterosaur
Indeterminate Heterodontosaurid remains[4]
Huasteconodon[2]	H. wiblei[2]				A Gobiconodont[2]
Possible indeterminate Sauropod remains[1]
Unnamed Mammaliaforms (IGM 6622,IGM 6855, and IGM 6856)[2]
Sphenovipera[5]	S. jimmysjoyi[5]				A venomous Sphenodont[5]
Tamaulipasaurus	T. morenoi				A strange burrowing Diapsid
Indeterminate Theropod remains[1]
Victoriaconodon[2]	V. inaequalis[2]				A Triconodontid[2]
Zapatadon	Z. ejidoensis				A dwarf Sphenodont

See also

• List of dinosaur-bearing rock formations
• List of pterosaur-bearing stratigraphic units

References

1. Weishampel, David B; et al. (2004). "Dinosaur distribution (Middle Jurassic, North America)." In: Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. Pp. 537–538. ISBN 0-520-24209-2.
2. Montellano, M., J. A. Hopson, and J. M. Clark. 2008. Late Early Jurassic mammaliaforms from Huizachal Canyon, Tamaulipas, Mexico. Journal of Vertebrate Paleontology 28:1130–1143.
3. Fraser, Nicholas; Sues, Hans-Dieter; (eds) (1994). In the Shadow of the Dinosaurs: Early Mesozoic Tetrapods. Cambridge University Press. ISBN 0-521-45242-2.
4. Clark, James; Montellano, Marisol; Hopson, James A., Hernandez, Rene; & Fastovsky, David A. (1994). "An Early or Middle Jurassic tetrapod assemblage from the La Boca Formation, northeastern Mexico". In Fraser, N.C.; Sues H.-D. (Eds.). In The Shadow of the Dinosaurs: Early Mesozoic Tetrapods. Cambridge: Cambridge University Press. pp. 295–302. ISBN 0-521-45899-4. Cite uses deprecated parameter |coauthors= (help)
5. Reynoso, V.H. 2005. Possible evidence of a venom apparatus in a Middle Jurassic sphenodontian from the Huizachal red beds of Tamaulipas, Mexico. Journal of Vertebrate Paleontology 25: 646–653. doi:10.1671/0272-4634(2005)025[0646:PEOAVA]2.0.CO;2

References