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Trionyx riabinini

Reptilia - Testudines - Trionychidae

Taxonomy
Trionyx riabinini was named by Kuznetsov and Chkhikvadze (1987). Its type specimen is IZK R-3919, a partial shell (a partial nuchal), and it is a 3D body fossil. Its type locality is Shakh-Shakh (lower), which is in a Santonian/Campanian fluvial-lacustrine claystone/sandstone in the Bostobe Formation of Kazakhstan.

It was recombined as Paraplastomenus riabinini by Kuznetsov and Chkhikvadze (1987) and Kordikova (1994); it was recombined as Aspideretoides riabinini by Vitek and Danilov (2010), Vitek and Danilov (2012) and Danilov and Vitek (2013).

Sister species lacking formal opinion data

View classification of included taxa

Synonymy list
YearName and author
1987Paraplastomenus riabinini Kuznetsov and Chkhikvadze
1987Trionyx riabinini Kuznetsov and Chkhikvadze p. 35
1994Paraplastomenus riabinini Kordikova
2000Trionyx riabinini Sukhanov p. 346
2010Aspideretoides riabinini Vitek and Danilov
2012Aspideretoides riabinini Vitek and Danilov p. 51
2013Aspideretoides riabinini Danilov and Vitek
2017Trionyx riabinini Georgalis and Joyce

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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
familyTrionychidaeGray 1825
Trionychinae(Gray 1825)
genusTrionyx
speciesriabinini

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
N. S. Vitek and I. G. Danilov 2010Largest carapace size approximately 50 cm; can be differentiated from Aspideretoides foveatus by bigger size and sculpture pattern; from Aspideretoides allani by bigger size and presence of sculptured plastral callosities at both large and small sizes; from Aspideretoides splendidus by having inguinal hypoplastral border not thickened and by shape of xiphiplastra.