Euclastes coahuilaensis Brinkman et al., 2009 Mexichelys is an extinct monotypic genus of sea turtle which lived in Mexico during the Cretaceous.

The only species is Mexichelys coahuilaensis.

[1] Mexichelys was erected in 2010 as a replacement name for Euclastes coahuilaensis, a species named in 2009.

[2] Cladogram based on Lynch and Parham (2003)[3] and Parham and Pyenson (2010):[1] Toxochelys Mexichelys Lophochelyinae Euclastes Argillochelys Eochelone Erquelinnesla Pacifichelys Puppigerus Cheloniidae sensu stricto