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Chelonoidis australis

Reptilia - Testudines - Testudinidae

Taxonomy
Testudo australis was named by Moreno (1889). Its type specimen is MLP 26-400, a partial shell, and it is a 3D body fossil. Its type locality is Monte Hermoso, which is in a Montehermosan terrestrial siltstone in the Monte Hermoso Formation of Argentina.

It was considered a nomen dubium by Auffenberg (1974); it was recombined as Chelonoidis australis by de Broin and de la Fuente (1993), de la Fuente (1997), de la Fuente et al. (2014) and de la Fuente et al. (2018).

Synonyms
Synonymy list
YearName and author
1889Testudo australis Moreno
1914Testudo praestans Rovereto
1993Chelonoidis australis de Broin and de la Fuente
1997Chelonoidis australis de la Fuente
2004Chelonoidis santafecina Agnolin
2014Chelonoidis australis de la Fuente et al.
2018Chelonoidis australis de la Fuente et al.

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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
familyTestudinidaeBatsch 1788
genusChelonoidis()
speciesaustralis()

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
M. S. de la Fuente et al. 2018Member of Testudinidae based on the following characters: presence of alternating quadrangular/octagonal neurals 2–5 with corresponding alternating costals; coincidence between the costo-peripheral suture with the pleuro-marginal sulci; well-developed axillary buttresses making contact with the costal bones viscerally; well-developed epiplastral lip. Associated with Chelonoidis gallardoi due to the development of vertebral gibbosities; differs from Ch. gallardoi in carapace proportions, the absence of pleural gibbosities, a wider epiplastral lip and a less developed anal notch.