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]

Contents

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

References

  1. ^ a b c d 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. ^ a b c d e f g h i j 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. [1]
  3. ^ a b c d e 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.; and Sues, H.-D. (Eds.). In The Shadow of the Dinosaurs: Early Mesozoic Tetrapods. Cambridge: Cambridge University Press. pp. 295–302. ISBN 0521458994. 
  5. ^ a b c 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 [2]

Footnotes

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