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Trionyx robustus

Reptilia - Testudines - Trionychidae

Taxonomy
Plastomenus robustus was named by Gilmore (1919). Its type specimen is USNM 8538, a partial shell, and it is a 3D body fossil. Its type locality is Kimbetoh West [USNM], which is in a Campanian terrestrial horizon in the Kirtland Formation of New Mexico.

It was recombined as Aspideretoides robustus by Sullivan et al. (2012); it was recombined as Trionyx robustus by Vitek and Joyce (2015).

Sister species lacking formal opinion data

Synonyms
Synonymy list
YearName and author
1919Plastomenus robustus Gilmore p. 53 figs. Pl. 17, 18:1
1930Plastomenus robustus Hay p. 107
1935Aspideretes ovatus Gilmore p. 182 figs. 15, Pl. 18:1
2012Aspideretoides robustus Sullivan et al. p. 356
2015Trionyx robustus Vitek 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
speciesrobustus()

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 robustus Gilmore 1919
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Invalid names: Aspideretes ovatus Gilmore 1935 [synonym]
Diagnosis
ReferenceDiagnosis
R. M. Sullivan et al. 2012Differs from Aspideretoides splendidus (Hay 1908) in the xiphipastron having a broader medial contact with the anterior portions arched forward, and a broad contact with the posterior margins of the hypoplastra. Differs from Aspideretoides austerus in having a broader hypoplastron; and the posterior margin of the hypoplastron deep,
resulting in a more acute margin than in A. splendidus and A. austerus. Lateral and medial margins of the hypoplastron and hyoplastron directed anteroposteriorly and subparallel.
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 Late/Upper Campanian to the top of the Late/Upper Maastrichtian or 83.50000 to 66.00000 Ma

Collections (21 total)


Time interval Ma Country or state Original ID and collection number
Late/Upper Campanian83.5 - 70.6USA (New Mexico) Aspideretes ovatus (100679) Aspideretoides robustus (53517 62317 96814 138830 154382 154383 154423 154430 154462 154587 154627 154632 154637 154638 154639 154644 154645 154647) Plastomenus robustus (type locality: 62548)
Late/Upper Maastrichtian70.6 - 66.0USA (New Mexico) Aspideretoides robustus (154616)