Euclastes

{{Short description|Extinct genus of turtles}}

{{Automatic taxobox

| fossil_range = Maastrichtian-Late Eocene
~{{fossil range|70|34}}

| image = Euclastes sp.jpg

| image_caption = Euclastes sp. skeleton

| taxon = Euclastes

| authority = Cope, 1867

| subdivision_ranks = Species

| subdivision_ref = {{Cite journal|last1=Parham|first1=James F.|last2=Pyenson|first2=Nicholas D.|date=March 2010|title=New sea turtle from the Miocene of Peru and the iterative evolution of feeding ecomorphologies since the Cretaceous|url=https://www.researchgate.net/publication/250071067|journal=Journal of Paleontology|language=en|volume=84|issue=2|pages=231–247|doi=10.1666/09-077R.1|bibcode=2010JPal...84..231P |s2cid=62811400|issn=0022-3360}}

| subdivision = * †E. acutirostris {{small|Jalil et al., 2009}}

• †E. platyops {{small|Cope, 1867}}
• †E. wielandi {{small|(Hay, 1908)}}

| synonyms =

• Glossochelys? {{small|Seeley 1871}}
• Rhetechelys {{small|Hay, 1908}}
• Osteopygoides {{small|Karl et al., 1998}}
• Catapleura {{small|Cope, 1870}}{{Cite journal|last1=Ullmann |first1=S. G. |last2=Carr |first2=E. |year=2021 |title=Catapleura Cope, 1870 is Euclastes Cope, 1867 (Testudines: Pan-Cheloniidae): synonymy revealed by a new specimen from New Jersey |journal=Journal of Systematic Palaeontology |volume=19 |issue=7 |pages=491–517 |doi=10.1080/14772019.2021.1928306 |bibcode=2021JSPal..19..491U |s2cid=236504236 }}

}}

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,{{cite journal |last=Lynch |first=S.C. |author2=Parham, J.F. |year=2003 |title=The first report of hard-shelled sea turtles (Cheloniidae sensu lato) from the Miocene of California, including a new species (Euclastes hutchisoni) with unusually plesiomorphic characters |journal=PaleoBios |volume=23 |issue=3 |pages=21–35 |url=http://www.seaturtle.org/PDF/Lynch_2003_PaleoBios.pdf }}{{dead link|date=September 2017 |bot=InternetArchiveBot |fix-attempted=yes }} while E. coahuilaensis named in 2009 was reassigned as Mexichelys coahuilaensis in 2010.[https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=165647 Euclastes coahuilaensis] from the Paleobiology Database[http://noticias.terra.com.br/ciencia/interna/0,,OI3618441-EI238,00-Exibidos+fosseis+de+tartarugas+com+mi+de+anos.html Exibidos fósseis de tartarugas com 72 mi de anos]