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Hadrianus corsoni

Reptilia - Testudines

Discussion

Type specimen not designated in 1871 report; later illustrated in LEIDY, J. 1873. Contributions to the Extinct Vertebrate Fauna of the Western Territories. Report of the U.S. Geological Survey of the Territories. F. V. Hayden, Geologist. Volume I

Taxonomy
Testudo corsoni was named by Leidy (1871). Its type specimen is ANSP 10050, a partial skeleton (plastron), and it is a 3D body fossil. Its type locality is Grizzly Buttes, which is in a Bridgerian terrestrial horizon in the Bridger Formation of Wyoming.

It was recombined as Hadrianus corsonii by Cope (1873), Cope (1875) and Cope (1877); it was recombined as Testudo (Hadrianus) corsoni by Williams (1953); it was recombined as Hadrianus corsoni by Cope (1882), Cope (1884), Hay (1902), Gilmore (1915), Lichtig and Lucas (2015) and Vlachos (2018).

Synonyms
Synonymy list
YearName and author
1871Hadrianus octonarius Cope p. 2
1871Hadrianus quadratus Cope p. 3
1871Testudo hadriana Cope p. 463
1871Hadrianus octonaria Cope p. 468
1871Hadrianus quadratus Cope p. 468
1871Testudo corsoni Leidy p. 154
1871Emys carteri Leidy p. 228
1872Hadrianus octonaria Cope p. 3
1873Hadrianus corsonii Cope
1873Hadrianus octonarius Cope
1873Testudo corsoni Leidy
1875Hadrianus corsonii Cope p. 36
1877Hadrianus corsonii Cope
1878Hadrianus octonarius Osborn et al.
1882Hadrianus corsoni Cope
1882Hadrianus octonarius Cope
1884Hadrianus corsoni Cope
1884Hadrianus octonarius Cope
1899Hadrianus octonarius Hay
1902Hadrianus corsoni Hay
1902Hadrianus octonarius Hay
1908Hadrianus tumidus Hay p. 380
1915Hadrianus corsoni Gilmore p. 143
1915Hadrianus robustus Gilmore p. 146
1915Hadrianus utahensis Gilmore p. 146
1953Testudo (Hadrianus) corsoni Williams p. 547
1953Testudo (Hesperotestudo) tumidus Williams p. 548
2015Hadrianus corsoni Lichtig and Lucas
2018Hadrianus corsoni Vlachos

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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
suborderCryptodira
Pantestudinoidea
superfamilyTestudinoidea
Pantestudinidae
genusHadrianus
speciescorsoni()

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
A. J. Lichtig and S. G. Lucas 2015"Based on (Hay 1908): A species of the genus Hadrianus with abdominal scutes barely posterior to the entoplastron. Abdominal scutes are less anteriorly elongated along the lateral edge than in H. majusculus. Pectoral scutes are less than half as wide as the abdominal scutes along the midline. Peripherals are lower dorsally than in H. majusculus"
E. Vlachos 2018Hadrianus corsoni can be diagnosed as a pan-testudinid and as belonging to Hadrianus based on the characters listed for those clades above. Hadrianus corsoni differs from other Hadrianus based on the presence of a large entoplastron that is wider than long and a nearly straight femoro-anal sulcus.