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Craspedochelys passmorei

Reptilia - Testudines - Plesiochelyidae

Taxonomy
Tholemys passmorei was named by Andrews (1921). Its type specimen is NHMUK R5871, a partial skeleton (subcomplete shell with associated postcranial remains, including parts of the girdles, the left humerus, and partial cervical vertebrae), and it is a 3D body fossil. Its type locality is Swindon Recreation Ground, which is in a Kimmeridgian marine claystone in the Kimmeridge Clay Formation of the United Kingdom.

It was recombined as Craspedochelys passmorei by Anquetin et al. (2017).

Synonymy list
YearName and author
1921Tholemys passmorei Andrews p. 153 figs. 1-3
2013Tholemys passmorei Pérez-García and Murelaga
2017Craspedochelys passmorei Anquetin 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
Thalassochelydia
familyPlesiochelyidaeRütimeyer 1873
genusCraspedochelys
speciespassmorei()

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
J. Anquetin et al. 2017Craspedochelys passmorei differs from all other Craspedochelys by having a hexagonal carapace, with its greatest width between peripherals IV and VII, and a deeper nuchal notch. In addition, Craspedochelys passmorei differs from Craspedochelys jaccardi by having a lower length/width ratio of the costal bones (around 4.3, as opposed to 4.8 or more for costal IV), reduced epiplastra that do not reach the lateral margin of the anterior plastral lobe, and a longer posterior plastral lobe. It differs from Craspedochelys picteti by being smaller in size and by having a less quadrangular anterior carapace, a contact between costal VIII and peripheral XI, a wider than long pygal bone, and wider than long hyoplastra.