Basic info Taxonomic history Classification Included Taxa
Morphology Ecology and taphonomy External Literature Search Age range and collections

Osteopygis backmani

Reptilia - Testudines

Taxonomy
Clemmys backmani was named by Russell (1934). Its type specimen is CMN 8685 and is a 3D body fossil. Its type locality is Clemmys site, Big Muddy Valley, which is in a Puercan terrestrial horizon in the Ravenscrag Formation of Canada.

It was recombined as Judithemys backmani by Brinkman et al. (2010) and Brinkman (2013); it was considered a nomen dubium by Bartels (1983), Holman and Fritz (2001) and Parham and Hutchison (2003); it was recombined as Osteopygis backmani by Gentry et al. (2023).

Synonymy list
YearName and author
1934Clemmys backmani Russell
2010Judithemys backmani Brinkman et al.
2013Judithemys backmani Brinkman
2023Osteopygis backmani Gentry et al.

Is something missing? Join the Paleobiology Database and enter the data

RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Life
Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
Osteichthyes()
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda
RankNameAuthor
Reptiliomorpha
Anthracosauria
subclassAmphibiosauriaKuhn 1967
Cotylosauria()
Amniota
Sauropsida
classReptilia
Testudinata(Oppel 1811)
orderTestudinesBatsch 1788
PancryptodiraJoyce et al. 2004
Macrobaenidae(Sukhanov 1964)
genusOsteopygis
speciesbackmani(Russell 1934)

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.

Osteopygis backmani Russell 1934
show all | hide all
Diagnosis
ReferenceDiagnosis
A. D. Gentry et al. 2023Osteopygis backmani can be diagnosed as a representative of Osteopygis by the set of shell characters listed for the genus above. Osteopygis backmani can be differentiated from other species of Osteopygis by the presence of a pronounced carapacial gutter extending to the bridge peripherals. Brinkman (2013) describes a specimen of O. backmani from the upper Paleocene of Alberta that has an associated lower jaw with symphyseal and lateral ridges on the triturating surface. The presence of these ridges differs from the lower jaws of J. sukhanovi, the only other North American “macrobaenid” for which a lower jaw is described.