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Axestemys byssinus

Reptilia - Testudines - Trionychidae

Taxonomy
Axestus byssinus was named by Cope (1872). Its type specimen is USNM 4089, a partial skeleton (xiphiplastron, cervical vertebra, isolated ilium, several fragmentary appendicular elements), and it is a 3D body fossil. Its type locality is Black's Fork, which is in a Bridgerian terrestrial horizon in the Bridger Formation of Wyoming. It is the type species of Axestemys, Axestus.

It was recombined as Axestemys byssina by Hay (1908), Vitek (2012) and Danilov and Vitek (2013); it was recombined as Trionyx byssinus by Gaffney (1979); it was recombined as Rafetus (Axestemys) byssina by Chkhikvadze (2000); it was recombined as Axestemys byssinus by Hay (1899), Hay (1902), Hay (1930) and Vitek and Joyce (2015).

Synonyms
Synonymy list
YearName and author
1872Axestus byssinus Cope p. 462
1873Axestus byssinus Cope
1884Axestus byssinus Cope
1899Axestemys byssinus Hay p. 348
1902Axestemys byssinus Hay p. 455
1908Axestemys byssina Hay p. 509 figs. Plate 104, fig. 4; text-figs. 668, 669
1908Temnotrionyx manducans Hay p. 534 figs. Plate 105, figs. 2, 3; text-fig. 690
1930Axestemys byssinus Hay p. 110
1930Temnotrionyx manducans Hay p. 112
1979Trionyx byssinus Gaffney
2000Rafetus (Axestemys) byssina Chkhikvadze
2012Aspideretoides robertemryi Danilov and Vitek
2012Axestemys byssina Vitek p. 4
2013Aspideretoides robertemryi Danilov and Vitek
2013Axestemys byssina Danilov and Vitek
2015Axestemys byssinus 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
genusAxestemys
speciesbyssinus()

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.

†Axestemys byssinus Cope 1872
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Invalid names: Eugenechelys robertemryi Chkhikvadze 2008 [synonym], Temnotrionyx manducans Hay 1908 [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: base of the Wasatchian to the top of the Bridgerian or 55.80000 to 46.20000 Ma

Collections (4 total)


Time interval Ma Country or state Original ID and collection number
Wasatchian55.8 - 50.3USA (Wyoming) Eugenichelys robertemryi (85438)
Bridgerian50.3 - 46.2USA (Wyoming) Axestemys byssinus (type locality: 16136) Axestus byssinus (130809) Temnotrionyx manducans (131895)