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Trionyx leucopotamicus

Reptilia - Testudines - Trionychidae

Taxonomy
Trionyx leucopotamicus was named by Cope (1891). Its type specimen is NMC 6232, an osteoderm (fragment of costal plate), and it is a 3D body fossil. Its type locality is Conglomerate Creek, which is in a Chadronian terrestrial horizon in the Cypress HIlls Formation of Canada.

It was recombined as Platypeltis leucopotamica by Hay (1908) and Hay (1930); it was recombined as Apalone leucopotamica by Hutchison (1996).

Sister species lacking formal opinion data
T. pliopedemontanus

Synonymy list
YearName and author
1891Trionyx leucopotamicus Cope p. 5
1902Trionyx leucopotamicus Hay p. 454
1908Platypeltis leucopotamica Hay p. 546 figs. Plate 113, figs. 1-3; text-fig. 704
1908Trionyx leucopotamicus Lambe
1930Platypeltis leucopotamica Hay p. 112
1996Apalone leucopotamica Hutchison p. 339
2015Trionyx leucopotamicus 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
speciesleucopotamicusCope 1891

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.

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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 Chadronian to the top of the Orellan or 37.20000 to 33.30000 Ma

Collections (4 total)


Time interval Ma Country or state Original ID and collection number
Chadronian37.2 - 33.9USA (South Dakota) Amyda sp. (16885)
Chadronian37.2 - 33.9Canada (Saskatchewan) Trionyx leucopotamicus (type locality: 101961) Trionyx leucopotamicus, Apalone leucopotamica (16919)
Orellan33.9 - 33.3USA (North Dakota) Apalone leucopotamica (17100)