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Euclastes

Reptilia - Testudines

Synonyms
Synonymy list
YearName and author
1870Euclastes Cope p. 148
1871Glossochelys Seeley
1887Erquelinnesia Dollo
1908Erquelinnesia Hay p. 160
1980Erquelinnesia Moody p. 161
1988Glossochelys Carroll
1988Erquelinnesia Weems p. 141 figs. Table 2
1995Erquelinnesia Hirayama p. 282
1998Osteopygoides Karl et al.
2000Pampaemys de la Fuente and Casadio
2002Erquelinnesia Sepkoski, Jr.
2003Euclastes Lynch and Parham p. 22
2004Euclastes Joyce et al.
2005Euclastes Parham p. 75
2009Euclastes Brinkman et al. p. 78
2009Euclastes Jalil et al.
2012Euclastes Mateus et al.
2014Euclastes Parham et al.
2014Euclastes Weems
2014Euclastes de Lapparent de Broin et al.

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
phylumChordataHaeckel 1847
subphylumVertebrata
superclassGnathostomata
Osteichthyes()
Sarcopterygii
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda()
Reptiliomorpha
RankNameAuthor
Anthracosauria
Batrachosauria()
Cotylosauria()
Amniota
Sauropsida
classReptilia
Testudinata(Oppel 1811)
orderTestudinesBatsch 1788
suborderCryptodira
PanchelonioideaJoyce et al. 2004
PancheloniidaeJoyce et al. 2004
genusEuclastes

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

Diagnosis
ReferenceDiagnosis
O. P. Hay 1908 (Erquelinnesia)Skull resembling that of Caretta caretta, but more elevated and descending more rapidly in front of the orbits. Palate flat, bounded by low cutting-edges, and extending backward to the hinder half of the roof of the mouth. Choanae in the hinder half of the roof of the mouth, their anterior boundary formed by the palatines, which have met behind the palatal plate of the vomer. Lower jaw not beakt. Shell resembling that of Caretta, but more rounded behind.
D. Brinkman et al. 2009Differs from Toxochelys Cope 1873, Nichollsemys Brinkman et al. 2006, and Eochelone Dollo 1903 in the presence of a secondary palate. Differs from Ctenochelys Zangerl 1953 in the greater extent of the secondary palate. Distinguished from other cheloniids based on a broad skull, low skull profile, broad and flat triturating surface, and wide, flat dentary with an elongate symphysis.