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Trionyx uintaensis

Reptilia - Testudines - Trionychidae

Taxonomy
Trionyx uintaensis was named by Cope (1873). Its type specimen is ANSP 10189, a partial shell (nearly complete carapace and a considerable part of the plastron), and it is a 3D body fossil. Its type locality is Cottonwood Creek badlands (Bridger B), which is in a Bridgerian terrestrial horizon in Wyoming.

It was recombined as Amyda uintaensis by Hay (1908) and Hay (1930); it was recombined as Rafetus (Axestemys) uintaensis by Chkhikvadze (2000); it was recombined as Oliveremys uintaensis by Vitek (2011).

Sister species lacking formal opinion data
T. pliopedemontanus

Synonyms
  • Amyda nelsoni was named by Case (1927). Its type specimen is UMMP No. 8393, a partial skeleton (nearly complete shell and pelvis plus some vertebrae and foot and limb bones), and it is a 3D body fossil. Its type locality is East of Granger, which is in a Bridgerian terrestrial horizon in the Bridger Formation of Wyoming.

    It was synonymized subjectively with Oliveremys uintaensis by Vitek (2011); it was synonymized subjectively with Trionyx uintaensis by Vitek and Joyce (2015).
  • Amyda franciscae was named by Hay (1908). Its type specimen is AMNH 5936, a partial skeleton (the complete carapace and plastron; the seventh and eighth cervical vertebrae; both scapulae and both coracoids; the pelvis, mostly hidden by the xiphiplastrals), and it is a 3D body fossil. Its type locality is Grizzly Buttes, which is in a Bridgerian terrestrial horizon in the Bridger Formation of Wyoming.

    It was synonymized subjectively with Oliveremys uintaensis by Vitek (2011); it was synonymized subjectively with Trionyx uintaensis by Vitek and Joyce (2015).
  • Aspidonectes tritor was named by Hay (1904). Its type specimen is AMNH 5913, a skull, and it is a 3D body fossil. Its type locality is 3 miles above the mouth of Cottonwood Creek (middle third of Bridger beds), which is in a Bridgerian terrestrial sandstone in Wyoming.

    It was recombined as Amyda tritor by Hay (1908) and Hay (1930); it was recombined as Rafetus (Axestemys) tritor by Chkhikvadze (2000); it was synonymized subjectively with Oliveremys uintaensis by Vitek (2011); it was synonymized subjectively with Trionyx uintaensis by Vitek and Joyce (2015).
Synonymy list
YearName and author
1872Trionyx uintaensis Leidy p. 267
1873Trionyx uintaensis Cope p. 617
1873Trionyx uintaensis Leidy p. 178
1875Trionyx uintaensis Cope p. 35
1878Trionyx uintaensis Osborn et al.
1902Trionyx uintaensis Hay p. 454
1904Aspidonectes tritor Hay p. 254
1908Amyda uintaensis Hay p. 519 figs. Plate 100, fig. 1; text-figs, 674, 675
1908Amyda franciscae Hay p. 523 figs. Plates 102, 103; text-figs. 678, 679
1908Amyda tritor Hay p. 529 figs. Text-figs. 687-689
1915Trionyx uintaensis Gilmore p. 157
1927Amyda nelsoni Case p. 223
1930Amyda franciscae Hay p. 111
1930Amyda nelsoni Hay p. 111
1930Amyda tritor Hay p. 111
1930Amyda uintaensis Hay p. 111
2000Rafetus (Axestemys) tritor Chkhikvadze
2000Rafetus (Axestemys) uintaensis Chkhikvadze
2011Oliveremys uintaensis Vitek
2015Trionyx uintaensis 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
speciesuintaensis

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 uintaensis Cope 1873
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Invalid names: Amyda franciscae Hay 1908 [synonym], Amyda nelsoni Case 1927 [synonym], Aspidonectes tritor Hay 1904 [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: Carroll 1988, Ernst and Barbour 1989

Age range: Bridgerian or 50.30000 to 46.20000 Ma

Collections (5 total)


Time interval Ma Country or state Original ID and collection number
Bridgerian50.3 - 46.2USA (Wyoming) Amyda franciscae (16228) Amyda nelsoni (99835) Aspidonectes tritor (131940) Trionyx uintaensis (16255 type locality: 130809)