PBDB Taxon

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Leptomeryx obliquidens

Mammalia - Leptomerycidae

Taxonomy

Leptomeryx obliquidens was named by Lull (1922). Its type specimen is YPM 10541, a partial skull (Poorly preserved skull and jaws, with entire series of eheek teeth.), and it is a 3D body fossil. Its type locality is Hermosa (Oligocene), which is in a Whitneyan terrestrial horizon in the Brule Formation of South Dakota.

Synonyms

Leptomeryx agatensis was named by Cook (1934). Its type specimen is No. HC500, a maxilla (left maxilla with P3 to M3), and it is not a trace fossil. Its type locality is Syndyoceras Quarry, which is in a Harrisonian terrestrial horizon in the Harrison Formation of Nebraska.

It was synonymized subjectively with Leptomeryx evansi by Heaton and Emry (1996); it was synonymized subjectively with Leptomeryx obliquidens by Webb (1998) and Vislobokova (2001); it was considered a nomen dubium by Korth and Diamond (2002).

Synonymy list

Year	Name and author
1922	Leptomeryx obliquidens Lull p. 115
1926	Leptomeryx obliquidens Matthew p. 4
1934	Leptomeryx agatensis Cook p. 155
2001	Leptomeryx obliquidens Vislobokova p. S138
2002	Leptomeryx obliquidens Korth and Diamond p. 122

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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	obliquidens

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 obliquidens Lull 1922

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Invalid names: Leptomeryx agatensis Cook 1934 [synonym]

Diagnosis

Reference	Diagnosis
R. S. Lull 1922	Large size; superior molars obliquely set; temporal ridges meeting at a wide angle to form the sagittal crest which is sharp and thin throughout its preserved length; bullæ laterally compressed, elongated oval in shape.