PBDB Taxon

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Echmatemys naomi

Reptilia - Testudines - Geoemydidae

Taxonomy

Echmatemys naomi was named by Hay (1908). Its type specimen is AMNH 5975 (holotype), a partial shell (partial carapace), and it is a 3D body fossil. Its type locality is Little Dry Creek, which is in a Bridgerian terrestrial horizon in the Bridger Formation of Wyoming.

Synonyms

Echmatemys obscura was named by Gilmore (1915). Its type specimen is CM 3253, a shell, and it is not a trace fossil. Its type locality is South of Kennedy's Hole, which is in an Uintan terrestrial horizon in the Uinta Formation of Utah.

It was synonymized subjectively with Echmatemys septaria by Roberts (1962); it was synonymized subjectively with Echmatemys naomi by Vlachos (2018).

Synonymy list

Year	Name and author
1908	Echmatemys naomi Hay
1915	Echmatemys obscura Gilmore p. 135
1930	Echmatemys naomi Hay p. 95
1930	Echmatemys obscura Hay p. 95
2018	Echmatemys naomi Vlachos
2020	Echmatemys naomi Vlachos p. 13

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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
—	Anthracosauria

Rank	Name	Author
subclass	Amphibiosauria	Kuhn 1967
—	Cotylosauria	()
—	Amniota
—	Sauropsida
class	Reptilia
—	Testudinata	(Oppel 1811)
order	Testudines	Batsch 1788
suborder	Cryptodira
—	Pantestudinoidea
superfamily	Testudinoidea
family	Geoemydidae	Theobald 1868
genus	Echmatemys
species	naomi

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.

†Echmatemys naomi Hay 1908

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Invalid names: Echmatemys obscura Gilmore 1915 [synonym]

Diagnosis

Reference	Diagnosis
E. Vlachos 2018	Echmatemys naomi can be diagnosed as a member of Echmatemys based on the characters listed for that clade above. Echmatemys naomi differs from other Echmatemys based on the following combination of characters: contact between marginal II and vertebral I, neural I much longer than wide, vertebral IV/V sulcus placed on the last neural, clear contact of large axillary scute with marginal IV and V, wide suprapygal V, and large inguinal scute that does not contact the femoral scute in ventral view.

Measurements

No measurements are available

Composition:

phosphaticsubp

Entire body:

yesg

Adult length:

100 to < 1000g

Environment:

freshwaterg

Locomotion:

actively mobilec

Life habit:

aquaticg

Diet:

herbivoreg

Reproduction:

oviparoussubo

Created:

2006-04-19 14:59:48

Modified:

2006-04-19 17:05:43

Source: g = genus, subo = suborder, c = class, subp = subphylum

References: Holroyd et al. 2001, Uetz 2005, Carroll 1988, Hendy et al. 2009

Age range: base of the Bridgerian to the top of the Uintan or 50.30000 to 39.70000 Ma

Collections (4 total)

Time interval	Ma	Country or state	Original ID and collection number
Bridgerian	50.3 - 46.2	USA (Wyoming)	Echmatemys naomi (type locality: 16255 206092) Echmatemys wyomingensis (74504)
Uintan	46.2 - 39.7	USA (Utah)	Echmatemys obscura (185689)