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Chelonoidis gringorum

Reptilia - Testudines - Testudinidae

Taxonomy
Testudo gringorum was named by Simpson (1942). Its type specimen is Amer. Mus. No. 3366 (Fossil Reptile Catalogue), a partial shell (plastron and much of carapace), and it is not a trace fossil. Its type locality is Testudo gringorum Type Locality, which is in a Miocene fluvial-deltaic sandstone in Argentina.

It was recombined as Geochelone (Chelonoides) gringorum by Auffenberg (1971); it was recombined as Geochelone gringorum by Crumly (1982); it was recombined as Chelonoidis gringorum by Auffenberg (1974), de Broin and de la Fuente (1993), de la Fuente (1994), de la Fuente and Vucetich (1998), Franz and Franz (2009), de la Fuente et al. (2014), de la Fuente et al. (2018) and Oriozabala et al. (2018).

Synonymy list
YearName and author
1942Testudo gringorum Simpson p. 1
1971Geochelone (Chelonoides) gringorum Auffenberg p. 115
1974Chelonoidis gringorum Auffenberg
1982Geochelone gringorum Crumly p. 215
1993Chelonoidis gringorum de Broin and de la Fuente p. 202
1994Chelonoidis gringorum de la Fuente
1998Chelonoidis gringorum de la Fuente and Vucetich
2009Chelonoidis gringorum Franz and Franz
2014Chelonoidis gringorum de la Fuente et al.
2018Chelonoidis gringorum Oriozabala et al.
2018Chelonoidis gringorum 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()
speciesgringorum()

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
C. Oriozabala et al. 2018Terrestrial turtles of middle size and member of the Neotropical Chelonoidis based on the absence of cervical scute. Differs from tortoises included in the carbonaria group (C. hesterna, C. carbonaria, and C. denticulata) by the presence of an oval outline of the shell (de la Fuente 1994).Chelonoidis gringorum differs from C. chilensis in the absence of contact between femoral and inguinal scutes in ventral view, absence of keels in peripheral plates and a well-developed expansion of the posterior process of the ischium (de la Fuente 1994)
M. S. de la Fuente et al. 2018Small to middle-sized tortoise, member of Testudinidae based on the following characters: alternating pattern of the neural/costal associations; well-developed plastral buttresses that are in clear contact with the costal bones; fusion of twelfth marginal scutes; presence of a well-developed epiplastral lip. Member of Chelonoidis based on the absence of cervical scute. Member of the chilensis group on the usually thin shell, being broad and depressed with lateral convex sides, a wide posterior plastral lobe, and anteroposteriorly narrow inguinal scar. It differs from Ch. chilensis by the hiding of the inguinal scute on ventral side of the plastron, the presence of an inguinal groove ventrally located between the basis of posterior plastral lobe and the hypoplastral inguinal pillar of the bridge, and by the expansion of the posterior process of the ischium.