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Thalassemys hugii

Reptilia - Testudines - Thalassemydidae

Discussion

With the exception of the lectotype, it is unclear which other specimens once formed the syntype series.

Taxonomy
Thalassemys hugii was named by Rütimeyer (1873). Its type specimen is NMS 8595 to NMS 8609 (lectotype; formerly NMS 1), a partial skeleton (A large carapace plus associated plastron fragments and postcranial remains), and it is a 3D body fossil. Its type locality is Cirin, Ain, BMNH Coll., which is in a Kimmeridgian marine horizon in France.

Synonyms
Synonymy list
YearName and author
1873Thalassemys hugii Rütimeyer p. 27
1873Thalassemys gresslyi Rütimeyer p. 39
1889Thalassemys hugii Lydekker p. 148
1965Thalassemys hugii Bräm p. 143
1965Eurysternum ignoratum Bräm p. 166 figs. Plate 8, fig. 6
1996Solnhofia ignoratum Lapparent de Broin et al. p. 562
2000Eurysternum ignoratum Joyce p. 699
2012Thalassemys hugii Karl et al.
2014Thalassemys hugii Anquetin et al.
2017Thalassemys hugii 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
PancryptodiraJoyce et al. 2004
familyThalassemydidaeZittel 1889
genusThalassemysRütimeyer 1859
specieshugii

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. 2017Thalassemys hugii can be diagnosed as a representative of Thalassemys by the full list of characters provided for that taxon above. Thalassemys hugii differs from all other Thalassemys by having narrower vertebral scutes. Thalassemys hugii further differs from Thalassemys bruntrutana by having a proportionally wider nuchal without anterolateral thickening on the ventral surface, a proportionally shorter plastron, narrower and more inclined xiphiplastra, and a smaller scapular angle, and differs from Thalassemys marina by having less pronounced lateral plastral fontanelles.