Pucapristis

Pucapristis is a prehistoric genus of sclerorhynchid ray whose fossils first appear in the fossil record in rocks dating from the Maastrichtian stage. The genus was described in 1963 by Schaeffer.[1] Fossils of Pucapristis have not been found in any subsequent strata. Incidentally, the Maastrichtian is the final portion of the Cretaceous Period and its endpoint marks the advent of the Cretaceous–Paleogene extinction event. This major geological transition is famous for being the mass extinction that wiped out the dinosaurs.

Dientes de Pucapristis branisi

Pucapristis
Temporal range: Maastrichtian
70–66 Ma
↓
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Chondrichthyes
Order: Rajiformes
Family: †Sclerorhynchidae
Genus: †Pucapristis
Schaeffer, 1963
Species:
†P. branisi
Binomial name
†Pucapristis branisi
Schaeffer, 1963

Biogeography

To date, Pucapristis fossils have been found only in the Maastrichtian deposits of central South America. The El Molino Formation of Bolivia produces Pucapristis tooth fossils in abundance. These Bolivian specimens have been recovered near the cities of Potosi and Sucre The Yacoraite Formation of Salta Province in northwestern Argentina is another locality from which Pucapristis remains can be excavated.

See also
  • Flora and fauna of the Maastrichtian stage
  • List of prehistoric cartilaginous fish (Chondrichthyes)

References
  1. Pucapristis at Fossilworks.org

Further reading
  • M. Gayet, L. G. Marshall, T. Sempere, F. J. Meunier, H. Capetta and J. Rage. 2001. Middle Maastrichtian vertebrates (fishes, amphibians, dinosaurs and other reptiles, mammals) from Pajcha Pata (Bolivia). Biostratigraphic, palaeoecologic and palaeobiogeographic implications. Palaeogeography, Palaeoclimatology, Palaeoecology 169(1–2):39–68
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