PBDB Taxon

Basic info	Taxonomic history	Classification	Included Taxa
Morphology	Ecology and taphonomy	External Literature Search	Age range and collections

Trionyx mira

Reptilia - Testudines - Trionychidae

Taxonomy

Amyda mira was named by Hay (1908). Its type specimen is AMNH 6130, a partial skeleton (the skull, without the lower jaw; the carapace complete; and the plastron, excepting the entoplastron, the epiplastra, and a portion of the left hyoplastron), 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 recombined as Trionyx mira by Vitek and Joyce (2015).

Sister species lacking formal opinion data

T. pliopedemontanus

Synonyms

Platypeltis extensa was named by Hay (1908). Its type specimen is AMNH 5951, a partial shell, 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 recombined as Apalone extensa by Hutchison (1996); it was synonymized subjectively with Trionyx mira by Vitek and Joyce (2015).
Platypeltis postera was named by Hay (1908). Its type specimen is AMNH 6133, a partial shell, and it is a 3D body fossil. Its type locality is Sage Creek (Bridger C), which is in a Bridgerian terrestrial horizon in the Bridger Formation of Wyoming.

It was recombined as Apalone postera by Hutchison (1996); it was synonymized subjectively with Trionyx mira by Vitek and Joyce (2015).

Synonymy list

Year	Name and author
1908	Platypeltis extensa Hay
1908	Platypeltis postera Hay
1908	Amyda mira Hay p. 527 figs. Plate 105, fig. 1; plate 106; text-figs. 684-686
1908	Platypeltis extensa Hay p. 545 figs. Plate 112; Text-fig. 703
1908	Platypeltis postera Hay p. 545 figs. Plate 111, figs 1-2
1930	Amyda mira Hay p. 111
1930	Platypeltis extensa Hay p. 112
1930	Platypeltis postera Hay p. 112
1996	Apalone extensa Hutchison p. 340
1996	Apalone postera Hutchison p. 340
2015	Trionyx mira Vitek and Joyce

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Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Deuterostomia
phylum	Chordata	Haeckel 1874
subphylum	Vertebrata
superclass	Gnathostomata
—	Osteichthyes	()
subclass	Sarcopterygii	()
subclass	Dipnotetrapodomorpha	(Nelson 2006)
subclass	Tetrapodomorpha	()
—	Tetrapoda
—	Reptiliomorpha

Rank	Name	Author
—	Anthracosauria
subclass	Amphibiosauria	Kuhn 1967
—	Cotylosauria	()
—	Amniota
—	Sauropsida
class	Reptilia
—	Testudinata	(Oppel 1811)
order	Testudines	Batsch 1788
suborder	Cryptodira
family	Trionychidae	Gray 1825
subfamily	Trionychinae	Gray 1825
genus	Trionyx
species	mira	()

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 mira Hay 1908

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Invalid names: Platypeltis extensa Hay 1908 [synonym], Platypeltis postera 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: Ernst and Barbour 1989, Carroll 1988

Age range: Bridgerian or 50.30000 to 46.20000 Ma

Collections (2 total)

Time interval	Ma	Country or state	Original ID and collection number
Bridgerian	50.3 - 46.2	USA (Wyoming)	Platypeltis extensa, Platypeltis postera, Amyda mira (type locality: 16228) Platypeltis postera (16406)