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Atolchelys lepida

Reptilia - Testudines - Bothremydidae

Taxonomy
Atolchelys lepida was named by Romano et al. (2014). Its type specimen is UERJ.MC 2, a skeleton, and it is a 3D body fossil. Its type locality is Atol Quarry (=CIMPOR quarry), which is in a Barremian lacustrine deltaic shale in the Coqueiro Seco Formation of Brazil. It is the type species of Atolchelys.

Synonymy list
YearName and author
2014Atolchelys lepida Romano et al. p. 2 fig. 1

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
phylumChordataHaeckel 1847
subphylumVertebrata
superclassGnathostomata
Osteichthyes()
Sarcopterygii
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda()
Reptiliomorpha
Anthracosauria
RankNameAuthor
Batrachosauria()
Cotylosauria()
Amniota
Sauropsida
classReptilia
Testudinata(Oppel 1811)
orderTestudinesBatsch 1788
suborderPleurodira
superfamilyPelomedusoidesBroin 1988
superfamilyPodocnemidoidea
familyBothremydidaeBaur 1891
genusAtolchelys
specieslepida

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
P. S. R. Romano et al. 2014The plastron of A. lepida gen. et sp. nov. exhibits the usual 11 bones present in most pleurodires, including a reduced pair of mesoplastra, and no fontanelles. It possesses two cranial characters diagnostic to Pan-Podocnemididae (Podocnemidera sensu 2): presence of a wide maxillary triturating surfaces and reduced single vomer. Also, the new species shares two synapomorphies with Podocnemidoidea (sensu 2): pterygoid contribution to the anterior margin of the foramen posterius canalis carotici interni and short basioccipital. Features diagnostic of Bothremydidae (sensu 2) are: triturating surfaces moderately wide, cavum pterygoidei absent, prootic partially covered in ventral view, foramen posterius canalis carotici interni not in prootic and basisphenoid-quadrate contact present. The autapomorphic characters of A. lepida gen. et sp. nov. are: long itudinally elongated foramen palatinum posterius, squared opisthotic in ventral view and basioccipital triangular, uneven, with tuberculum and with a broad anterior portion.