Chubutemys, GAFFNEY & RICH & VICKERS-RICH & CONSTANTINE & VACCA & KOOL, 2007

GAFFNEY, EUGENE S., RICH, THOMAS H., VICKERS-RICH, PATRICIA, CONSTANTINE, ANDREW, VACCA, RAUL & KOOL, LESLEY, 2007, Chubutemys, a New Eucryptodiran Turtle from the Early Cretaceous of Argentina, and the Relationships of the Meiolaniidae, American Museum Novitates 3599, pp. 1-36 : 4

Chubutemys , new genus

TYPE SPECIES: Chubutemys copelloi , new genus and species .

DISTRIBUTION: Aptian, Early Cretaceous, Cerro Costaño Member, Cerro Barcino Formation.

ETYMOLOGY: Chubut, for province of Argentina in which it was found.

DIAGNOSIS: A genus of eucryptodire known only from the skull, similar to Dracochelys, Hangaiemys , and Ordosemys ; nasal-frontal contact absent in contrast to Ordosemys ; frontal does not enter orbit in contrast to Dracochelys , Ordosemys, Hangaiemys , and Sinemys ; temporal roof broadly covered by parietals extending posterior to otic chamber in contrast to the deep emargination seen in Hangaiemys , Judithemys , Ordosemys , and Sinemys (and probably Dracochelys , although the temporal roof is incompletely known); broad parietal-squamosal contact in contrast to Dracochelys , Ordosemys, Hangaiemys , and Sinemys ; cheek emargination absent in contrast to Dracochelys, Hangaiemys , Judithemys , Ordosemys , and Sinemys ; triturating surface narrow as in Ordosemys and Sinemys , but not very narrow as in Dracochelys and Hangaiemys ; foramen palatinum posterius similar in size to that in Ordosemys , not very large as in Dracochelys and Hangaiemys ; deep pit on pterygoid absent in contrast to Dracochelys and Ordosemys ; foramen posterius canalis caroticus laterale exposed in ventral view, widely separated from foramen caroticum basisphenoidale, and formed in gap between pterygoid and basisphenoid as in Dracochelys and Niolamia , in contrast to more posterior position as in Hangaiemys , Judithemys , Sinemys , and Ordosemys ; canalis caroticus internus only partially floored by bone along contact of basisphenoid and pterygoid as in Dracochelys, Hangaiemys , Ordosemys , and Sinemys ; foramen caroticum basisphenoidale formed entirely by basisphenoid and open ventrally as in Dracochelys , Ordosemys, Hangaiemys , and Sinemys ; basisphenoid triangular in ventral view as in Dracochelys and Niolamia , not rectangular as in Ordosemys and Hangaiemys .