PBDB Taxon

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Leptomeryx evansi

Mammalia - Leptomerycidae

Taxonomy

Leptomeryx evansi was named by Leidy (1853) [genotype]. Its type specimen is USNM 157, a partial skull (partial skull and associated mandible), and it is a 3D body fossil.

Synonyms

Leptomeryx lenis was named by Cook (1934). Its type specimen is No. HC503, a partial skull (parts of both maxillae and right lower jaw), and it is not a trace fossil. Its type locality is Sowbelly Creek, which is in a Whitneyan terrestrial horizon in the Brule Formation of Nebraska.

It was synonymized subjectively with Leptomeryx evansi by Heaton and Emry (1996) and Korth and Diamond (2002).
Trimerodus cedrensis was named by Cope (1873).

It was synonymized subjectively with Leptomeryx evansi by Cope (1874), Hay (1902) and Frick (1937).

Synonymy list

Year	Name and author
1853	Leptomeryx evansi Leidy p. 394
1857	Leptomeryx evansi Leidy p. 89
1873	Trimerodus cedrensis Cope
1873	Trimerodus cedreusis Cope p. 8
1873	Leptomeryx evansi Leidy p. 216
1902	Leptomeryx evansi Hay p. 671
1934	Leptomeryx lenis Cook p. 154
1940	Leptomeryx evansi Scott p. 553
2001	Leptomeryx evansi Vislobokova p. S138
2002	Leptomeryx evansi Korth and Diamond p. 113 figs. 2, 3

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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
subclass	Amphibiosauria	Kuhn 1967
—	Cotylosauria	()
—	Amniota
subclass	Synapsida
—	Therapsida	()
infraorder	Cynodontia	()
—	Mammaliamorpha
—	Mammaliaformes

Rank	Name	Author
class	Mammalia
—	Theriamorpha	(Rowe 1993)
—	Theriiformes	()
—	Trechnotheria
—	Cladotheria
—	Zatheria
subclass	Tribosphenida	()
subclass	Theria
—	Eutheria	()
—	Placentalia
—	Boreoeutheria
—	Laurasiatheria
—	Scrotifera
—	Euungulata
—	Artiodactylamorpha
—	Artiodactyla	()
—	Ruminantiamorpha
—	Ruminantia	(Scopoli 1777)
—	Pecora	()
family	Leptomerycidae
genus	Leptomeryx
species	evansi

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.

†Leptomeryx evansi Leidy 1853

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Invalid names: Leptomeryx lenis Cook 1934 [synonym], Trimerodus cedrensis Cope 1873 [synonym]

Diagnosis

Reference	Diagnosis
W. W. Korth and M. E. Diamond 2002	Intermediate-sized species; enamel on cheek teeth highly crenulated; Palaeomeryx-fold present on lower molars; entoconulid on M3 cylin- drical with deep posterior valley, separating it from the hypoconulid; protostyle present on upper molars.