Kayentachelys aprix Gaffney, Hutchison, Jenkins, and Meeker, 1987

Sterli, Juliana & Joyce, Walter G., 2007, The cranial anatomy of the Early Jurassic turtle Kayentachelys aprix, Acta Palaeontologica Polonica 52 (4), pp. 675-694 : 676-677

publication ID	https://doi.org/ 10.5281/zenodo.13741264
persistent identifier	https://treatment.plazi.org/id/C6548789-FFE0-FFF2-FCB4-FB8B0D4EFEB6
treatment provided by	Felipe
scientific name	Kayentachelys aprix Gaffney, Hutchison, Jenkins, and Meeker, 1987
status

Treatment

Type specimen: MNA V1558 View Materials (also catalogued as MCZ 8913 About MCZ ) .

Referred material: MCZ 8914 About MCZ , MCZ 8915 About MCZ , MCZ 8916 About MCZ , MCZ 8917 About MCZ , MCZ 8983 About MCZ , MCZ 8999 About MCZ , MNA V2664 , TMM 43647−1 View Materials , TMM 43651−1 View Materials , TMM 43653−1 View Materials , TMM 43669−2 View Materials , TMM 43670−2 View Materials , TMM 43687−27 View Materials , and UCMP 130408 View Materials .

Emended diagnosis (cranial characters).—Apertura narium externa not divided; prefrontals not in contact along the midline; lacrimals absent; frontals forms part of the orbit; processus inferior parietalis does not reach further anteriorly than the otic chamber; foramen nervi trigemini open anterodorsally; antrum postoticum incipient; vomer unpaired; cavum tympani well developed; pterygoid teeth present; vomerine and palatine teeth absent; interpterygoid vacuity present; epipterygoid rod−like and protruding into temporal cavity; canalis cavernosus partially floored by the pterygoid; hiatus acusticus well ossified; presence of a foramen (foramen jugulare intermedium) that is located in the posterior part of the skull between the exoccipital and opisthotic, that communicates with the foramen jugulare anterius and the fenestra perilymphatica; floor of the cavum cranii thick; pair of basioccipital tubera present; prootic exposed in ventral view; basipterygoid process present; foramen posterius canalis carotici interni formed entirely by the basisphenoid; basisphenoid pits present; processus trochlearis oticum or pterygoidei absent; splenial forms part of the symphysis; presence of a retroarticular process.

Stratigraphic and geographic range.—Silty facies of Kayenta Formation, Early Jurassic ( Clark and Fastovsky 1986). Gold Springs and Willow Springs, Adeii Eechii Cliffs, Coconino County, Arizona.