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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
T. pliopedemontanus

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()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
—Osteichthyes()
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
—Tetrapoda
—Reptiliomorpha
RankNameAuthor
—Anthracosauria
subclassAmphibiosauriaKuhn 1967
—Cotylosauria()
—Amniota
—Sauropsida
classReptilia
—Testudinata(Oppel 1811)
orderTestudinesBatsch 1788
suborderCryptodira
familyTrionychidaeGray 1825
subfamilyTrionychinaeGray 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.

†Trionyx riabinini Kuznetsov and Chkhikvadze 1987
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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.
Measurements
No measurements are available
Composition: phosphaticsubp
Body part: carapacef
Adult length: 100 to < 1000f
Grouping: solitaryf
Environment: brackish, freshwaterf
Locomotion: actively mobilef
Life habit: aquaticf
Diet: piscivoref
Diet 2: carnivoref
Reproduction: oviparousf
Created: 2005-08-25 13:24:04
Modified: 2005-09-09 19:45:41
Source: f = family, subp = subphylum
References: Carroll 1988, Ernst and Barbour 1989

Age range: base of the Middle Turonian to the top of the Early/Lower Santonian or 93.50000 to 83.50000 Ma

Collections (4 total)


Time interval Ma Country or state Original ID and collection number
Middle Turonian - Late/Upper Turonian93.5 - 89.3Uzbekistan (Navoi) Aspideretoides riabinini (75943)
Santonian - Early/Lower Campanian86.3 - 70.6Kazakhstan (Qyzylorda) Aspideretoides riabinini (68826) Trionychidae indet. (type locality: 53134)
Early/Lower Santonian85.8 - 83.5Tajikistan (Sogd) Trionyx riabinini, Aspideretoides riabinini (58701)