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Trionyx foveatus

Reptilia - Testudines - Trionychidae

Taxonomy
Trionyx foveatus was named by Leidy (1856). Its type specimen is ANSP 9269, a partial shell (small fragments of costal and sternal plates), and it is a 3D body fossil. Its type locality is Judith River badlands (USGS), which is in a Campanian/Campanian terrestrial horizon in the Judith River Formation of Montana.

It was recombined as Aspideretes foveatus by Hay (1908) and Hay (1930); it was recombined as Hummelichelys foveatus by Chkhikvadze (2000); it was recombined as Aspideretoides foveatus by Leidy (1856), Gardner et al. (1995) and Joyce et al. (2016).

Sister species lacking formal opinion data
T. pliopedemontanus

Synonyms
Synonymy list
YearName and author
1856Aspideretoides foveatus Leidy
1856Trionyx foveatus Leidy p. 73
1857Trionyx foveatus Leidy p. 90
1860Trionyx foveatus Leidy p. 148
1897Trionyx foveatus Marsh p. 527
1902Trionyx foveatus Hay p. 454
1902Trionyx foveatus Lambe p. 33
1908Aspideretes foveatus Hay p. 496 figs. Plate 89, figs. 1, 2; text-figs. 643, 644
1914Aspideretes maturus Lambe p. 13
1914Aspideretes subquadratus Lambe p. 13 figs. Pl. 1
1916Aspideretes subquadratus Lambe p. 195
1930Aspideretes foveatus Hay p. 108
1930Aspideretes maturus Hay p. 109
1930Aspideretes subquadratus Hay p. 109
1933Aspideretes rugosus Parks p. 26 figs. Pl. 8:1
1995Aspideretoides foveatus Gardner et al.
2000Hummelichelys foveatus Chkhikvadze
2000Hummelichelys subquadratus Chkhikvadze
2015Trionyx foveatus Vitek and Joyce
2016Aspideretoides foveatus Joyce et al.

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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
speciesfoveatus

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 foveatus Leidy 1856
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Invalid names: Aspideretes maturus Lambe 1914 [synonym], Aspideretes rugosus Parks 1933 [synonym], Aspideretes subquadratus Lambe 1914 [synonym]
Diagnosis
No diagnoses are available
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: Ernst and Barbour 1989, Carroll 1988

Age range: base of the Middle Campanian to the top of the Late/Upper Maastrichtian or 83.50000 to 66.00000 Ma

Collections (4 total)


Time interval Ma Country or state Original ID and collection number
Campanian83.6 - 72.1Canada (Alberta) Aspideretes rugosus (177140) Aspideretes subquadratus, Trionyx foveatus (123085)
Middle Campanian - Late/Upper Campanian83.5 - 70.6USA (Montana) Trionyx foveatus (type locality: 69213)
Late/Upper Maastrichtian70.6 - 66.0USA (North Dakota) Aspideretes foveatus (127733)