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Peltochelys duchastelii

Reptilia - Compsemydidae

Taxonomy
Peltochelys duchastelii was named by Dollo (1885). Its type specimen is IRSNB Ct. R. 16 (also numbered 1543) [lectotype], a shell (a complete but flattened carapace and plastron), and it is a 3D body fossil. Its type locality is Sainte-Barbe coal mine, Bernissart, which is in a Barremian/Aptian lacustrine - small claystone/bituminous coal in the Sainte-Barbe Clays Formation of Belgium.

It was corrected as Peltochelys duchastelli by Dollo (1884), Danilov and Parham (2008); it was synonymized subjectively with Tretosternum bakewelli by Lydekker and Boulenger (1887), Lydekker (1889); it was synonymized subjectively with Tretosternum punctatum by Delair (1958).

Synonymy list
YearName and author
1884Peltochelys duchastelli Dollo
1884Peltochelys duchastelii Dollo p. 78
1885Peltochelys duchastelii Dollo p. 78 figs. plate 2
1988Peltochelys duchastelli Meylan pp. 444-445 figs. 3-4
2008Peltochelys duchastelli Danilov and Parham
2011Peltochelys duchastelii Pérez-García p. 252
2020Peltochelys duchastelii Joyce and Rollot

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
—Osteichthyes()
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
—Tetrapoda
RankNameAuthor
—Reptiliomorpha
—Anthracosauria
subclassAmphibiosauriaKuhn 1967
—Cotylosauria()
—Amniota
—Sauropsida
classReptilia
—Testudinata(Oppel 1811)
—Paracryptodira
familyCompsemydidae
genusPeltochelysDollo 1884
speciesduchastelii

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.

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Diagnosis
ReferenceDiagnosis
W. G. Joyce and Y. Rollot 2020Peltochelys duchastelii can be diagnosed as a representative of Compsemydidae, a clade of paracryptodires, by the presence of a finely textured shell, a sutured bridge, and a sinuous plastral midline sulcus; absence of a contact between peripheral 1 and costal 1; and the withdrawal of the nuchal from the anterior margin of the shell resulting from a midline contact of peripherals 1. Within Compsemydidae, Peltochelys duchastelii is most readily diagnosed by a clear contact of costal 8 with peripheral 11 (likely absent in Riodevemys inumbragigas), a point contact of vertebral 1 with marginal 3 (absent in all others), the absence of mesoplastra (present in all others), a shallow xiphiplastral notch (deep in Toremys cassiopeia and Compsemys spp.), and the presence of a single gular (likely double in all others).