Euclastes
Template:Short description Template:Automatic taxobox
Euclastes is an extinct genus of sea turtles that survived the Cretaceous–Paleogene mass extinction. The genus was first named by Edward Drinker Cope in 1867, and contains three species. E. hutchisoni, was named in 2003 but has since been reassigned to the genus Pacifichelys,[1] while E. coahuilaensis named in 2009 was reassigned as Mexichelys coahuilaensis in 2010.[2][3]
Description
Unlike the sea turtles Toxochelys and Eochelone, Euclastes has a secondary palate. However, the secondary palate of Euclastes is not as extensive as it is in Ctenochelys and Angolachelys.[4] The genus can be distinguished by later sea turtles based on its broad, low skull; broad, flat palate; wide, flat dentary bone with an elongated symphysis; and low tomial ridge on the beak. The widened palate and dentaries give Eochelone wide, flat jaws suitable for crushing hard-shelled organisms.[1]
Classification
Species
- †E. acutirostris Jalil et al., 2009Script error: No such module "Check for unknown parameters".
- †E. platyops Cope, 1867Script error: No such module "Check for unknown parameters".
- †E. wielandi (Hay, 1908)Script error: No such module "Check for unknown parameters".
Phylogeny
Cladogram based on Lynch and Parham (2003)[1] and Parham and Pyenson (2010):[5]
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Distribution
Fossils of Euclastes have been found in:[6]
- Maastrichtian
- Bentiaba, Angola[7]
- Quiriquina Formation, Chile
- Hornerstown and Navesink Formations, New Jersey
- Paleocene
- Jagüel and Roca Formations, Argentina
- Aquia and Brightseat Formations, Maryland
- Sidi Chennane and Couche 2 Formation, Morocco
- Eocene
- Parkers Ferry Formation, South Carolina
References
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- ↑ a b c Script error: No such module "Citation/CS1".Script error: No such module "Unsubst".
- ↑ Euclastes coahuilaensis from the Paleobiology Database
- ↑ Exibidos fósseis de tartarugas com 72 mi de anos
- ↑ Script error: No such module "Citation/CS1".
- ↑ Script error: No such module "Citation/CS1".
- ↑ Euclastes at Fossilworks.org
- ↑ Mateus, O., M. J. Polcyn, L. L. Jacobs, R. Arujo, A. S. Schulp, J. Marinheiro, B. Pereira and D. Vineyard. 2012. Cretaceous amniotes from Angola: dinosaurs, pterosaurs, mosasaurs, plesiosaurs, turtles. Actas de V Jornadas Internacionales sobre Paleontologia de Dinosaurios y su Entorno, Salas de los Infantes, Burgos 71-105
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External links
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- Chelonioidea
- Prehistoric turtle genera
- Cretaceous–Paleogene boundary
- Maastrichtian genus first appearances
- Eocene genus extinctions
- Cretaceous turtles
- Paleocene turtles
- Eocene turtles
- Late Cretaceous reptiles of Africa
- Fossils of Angola
- Late Cretaceous reptiles of North America
- Cretaceous United States
- Fossils of the United States
- Late Cretaceous reptiles of South America
- Cretaceous Chile
- Fossils of Chile
- Paleogene reptiles of Africa
- Fossils of Morocco
- Paleogene reptiles of North America
- Paleogene United States
- Paleogene reptiles of South America
- Paleogene Argentina
- Fossils of Argentina
- Fossil taxa described in 1867
- Taxa named by Edward Drinker Cope