PBDB Taxon

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

Leptochoerus

Mammalia - Leptochoeridae

Taxonomy

Leptochoerus was named by Leidy (1856). Its type is Leptochoerus spectabilis.

It was assigned to Hyotheriinae by Hay (1902); to Leptochoerinae by Edwards (1976), Carroll (1988) and Stucky (1998); and to Leptochoeridae by Leidy (1856), Scott (1913), Scott (1940) and Theodor et al. (2007).

Species

L. elegans (syn. Nanochoerus scotti), L. emilyae, L. spectabilis (syn. L. gracilis, Laopithecus robustus) (type species), L. supremus

Synonyms

Laopithecus was named by Marsh (1875). Its type is Laopithecus robustus.

It was synonymized subjectively with Menotherium by Hay (1902); it was synonymized subjectively with Leptochoerus by Macdonald (1955), Edwards (1976), McKenna and Bell (1997), Stucky (1998) and Theodor et al. (2007).

Synonymy list

Year	Name and author
1856	Leptochoerus Leidy
1875	Laopithecus Marsh
1902	Leptochoerus Hay p. 657
1913	Leptochoerus Scott p. 361
1940	Leptochoerus Scott p. 366
1976	Leptochoerus Edwards p. 103
1988	Leptochoerus Carroll
1998	Leptochoerus Stucky p. 363
2007	Leptochoerus Theodor et al. p. 55

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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	()

Rank	Name	Author
infraorder	Cynodontia	()
—	Mammaliamorpha
—	Mammaliaformes
class	Mammalia
—	Cladotheria
—	Zatheria
subclass	Tribosphenida	()
subclass	Theria
—	Eutheria	()
—	Placentalia
—	Boreoeutheria
—	Laurasiatheria
—	Scrotifera
—	Euungulata
—	Artiodactylamorpha
—	Artiodactyla	()
superfamily	Dichobunoidea	Gill 1872
family	Leptochoeridae
genus	Leptochoerus

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.

G. †Leptochoerus Leidy 1856

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†Leptochoerus elegans Macdonald 1955

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Invalid names: Nanochoerus scotti Macdonald 1955 [synonym]

†Leptochoerus emilyae Edwards 1976

†Leptochoerus spectabilis Leidy 1856

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Invalid names: Laopithecus robustus Marsh 1875 [synonym], Leptochoerus gracilis Marsh 1894 [synonym]

†Leptochoerus supremus Macdonald 1955

Invalid names: Laopithecus Marsh 1875 [synonym]

Diagnosis

Reference	Diagnosis
P. Edwards 1976	Skull with short rostrum. More massive, bunodont lower molars than Stibarus, which do not have a subcrcsccntic appearance when little worn; paraconids are lacking. P/2, P2/, and P/3 may be tall, single-cusped, or low tri-cuspcd, elongate teeth. MI-3/ are triangular, but lingual edge is blunted-off. I,eptochocnis is the larger, more robust. genus of the subfamily.

Measurements

No measurements are available

Composition:

phosphaticsubp

Environment:

terrestrialo

Locomotion:

actively mobilec

Life habit:

ground dwellingo

Diet:

grazero

Diet 2:

browsero

Reproduction:

viviparoussubc

Created:

2005-08-26 14:03:05

Modified:

2005-09-19 12:23:23

Source: o = order, subc = subclass, c = class, subp = subphylum

References: Nowak 1999, Hendy et al. 2009, Carroll 1988, Lillegraven 1979

Age range: base of the Chadronian to the top of the Rupelian or 37.20000 to 28.10000 Ma

Collections (27 total)

Time interval	Ma	Country or state	Original ID and collection number
Bartonian - Rupelian	41.3 - 28.1	Mexico (Oaxaca)	L. sp. (166797)
Chadronian	37.2 - 33.9	USA (South Dakota)	L. elegans (17013)
Chadronian	37.2 - 33.9	USA (Montana)	L. sp. (16924)
Orellan	33.9 - 33.3	USA (Colorado)	L. spectabilis (17081 17082)
Orellan	33.9 - 33.3	USA (Nebraska)	L. elegans (17231 17252 17256) L. elegans, L. emilyae (17271) L. supremus (17272)
Orellan	33.9 - 33.3	USA (South Dakota)	L. sp. (17094 17187 17189) Nanochoerus elegans (17162) Nanochoerus scotti (17097)
Orellan	33.9 - 33.3	Canada (Saskatchewan)	L. sp. (17111)
Whitneyan	33.3 - 30.8	USA (South Dakota)	L. sp. (17338 17384) L. supremus (17329)
Whitneyan	33.3 - 30.8	USA (Nebraska)	L. elegans (17416) L. spectabilis (17409 17412 17419)
Whitneyan	33.3 - 30.8	Canada (Saskatchewan)	L. sp. (17372)
Whitneyan	33.3 - 30.8	USA (Colorado)	L. spectabilis (17426)
Geringian	30.8 - 26.3	USA (South Dakota)	L. sp. (17630 17644)