PBDB Taxon

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Morphology	Ecology and taphonomy	External Literature Search	Age range and collections

Leptochoeridae

Mammalia - Leptochoeridae

Taxonomy

Leptochoeridae was named by Marsh (1894).

It was assigned to Palaeodonta by Scott (1940); to Entelodontoidea by Carroll (1988); to Dichobunoidea by Colbert (1938), Theodor et al. (2007); and to Artiodactyla by Scott (1913), Korth et al. (2022).

Subtaxa

Diacodexis woltonensis, Ibarus, Laredochoerus, Leptochoerus (syn. Laopithecus), Stibarus (syn. Nanochoerus, Menotherium)

Synonyms

Diacodexis woltonensis was named by Krishtalka and Stucky (1985). Its type specimen is CM 43478, a set of teeth (right p4 - m3), and it is a 3D body fossil. Its type locality is K-14, which is in a Wasatchian terrestrial horizon in the Wind River Formation of Wyoming.

It was considered an invalid subgroup of Leptochoeridae by Theodor et al. (2007).

Synonymy list

Year	Name and author
1894	Leptochoeridae Marsh p. 273
1913	Leptochoeridae Scott p. 361
1938	Leptochoeridae Colbert p. 105
1940	Leptochoeridae Scott p. 366
1985	Diacodexis woltonensis Krishtalka and Stucky
1988	Leptochoeridae Carroll
2007	Leptochoeridae Theodor et al. p. 55
2022	Leptochoeridae Korth et al.

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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
family	Leptochoeridae

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.

Fm. †Leptochoeridae Marsh 1894

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G. †Ibarus Storer 1984

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†Ibarus ignotus Storer 1984

G. †Laredochoerus Westgate 1994

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†Laredochoerus edwardsi Westgate 1994

G. †Leptochoerus Leidy 1856

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†Leptochoerus elegans Macdonald 1955

Invalid names: Nanochoerus scotti Macdonald 1955 [synonym]

†Leptochoerus emilyae Edwards 1976

†Leptochoerus spectabilis Leidy 1856

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

†Leptochoerus supremus Macdonald 1955

Invalid names: Laopithecus Marsh 1875 [synonym]

G. †Stibarus Cope 1873

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†Stibarus montanus Matthew 1903

†Stibarus obtusilobus Cope 1873

Invalid names: Stibarus lemurinus Cope 1874 [synonym]

†Stibarus quadricuspis Hatcher 1901

Invalid names: Stibarus loomisi Scott 1940 [synonym]

†Stibarus yoderensis Macdonald 1955

Invalid names: Menotherium Cope 1874 [synonym], Nanochoerus Macdonald 1955 [synonym]

Invalid names: Diacodexis woltonensis Krishtalka and Stucky 1985 [invalid subgroup]

Diagnosis

No diagnoses are available

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

Age range: base of the Wasatchian to the top of the Rupelian or 55.80000 to 28.10000 Ma

Collections (73 total)

Time interval	Ma	Country or state	Original ID and collection number
Lostcabinian	55.8 - 50.3	USA (Wyoming)	Diacodexis woltonensis (15917 15930 15950)
Wasatchian	55.8 - 50.3	USA (Wyoming)	Diacodexis woltonensis (15948 15949 15954 15989)
Late/Upper Uintan	46.2 - 39.7	USA (California)	Ibarus ignotus (16585)
Late/Upper Uintan	46.2 - 39.7	Canada (Saskatchewan)	Ibarus ignotus (16626)
Late/Upper Uintan	46.2 - 39.7	USA (Texas)	Laredochoerus edwardsi, Leptochoeridae indet. (16542)
Bartonian - Rupelian	41.3 - 28.1	Mexico (Oaxaca)	Leptochoerus sp. (166797)
Duchesnean	39.7 - 37.0	USA (Wyoming)	Leptochoeridae indet. (16884)
Duchesnean	39.7 - 37.0	Canada (Saskatchewan)	Leptochoeridae indet. (16845)
Chadronian	37.2 - 33.9	USA (North Dakota)	Stibarus montanus (16991)
Chadronian	37.2 - 33.9	Canada (Saskatchewan)	Stibarus montanus (16919)
Chadronian	37.2 - 33.9	USA (Colorado)	Stibarus obtusilobus, Stibarus lemurinus (16977)
Chadronian	37.2 - 33.9	USA (Nebraska)	Leptochoeridae indet. (17014) Leptochoeridae indet., Stibarus sp. (16930)
Chadronian	37.2 - 33.9	USA (South Dakota)	Leptochoerus elegans (17013)
Chadronian	37.2 - 33.9	USA (Wyoming)	Stibarus sp. (16960 16961 16962 16963) Stibarus yoderensis (17045)
Chadronian	37.2 - 33.9	USA (Montana)	Leptochoerus sp. (16924) Stibarus montanus (16959 16988 17010)
Middle Chadronian	37.2 - 33.9	Canada (Saskatchewan)	Stibarus montanus (16928)
Late/Upper Chadronian - Orellan	37.2 - 33.3	USA (Nebraska)	Stibarus obtusilobus (230806)
Orellan	33.9 - 33.3	USA (South Dakota)	Leptochoeridae indet. (17173) Leptochoerus sp. (17189) Leptochoerus sp., Stibarus obtusilobus (17094) Leptochoerus sp., Stibarus sp. (17187) Nanochoerus elegans (17162) Nanochoerus quadricuspis (17068) Nanochoerus scotti (17097) Stibarus obtusilobus (17174)
Orellan	33.9 - 33.3	USA (Nebraska)	Leptochoerus elegans (17252 17256) Leptochoerus elegans, Leptochoerus emilyae, Stibarus obtusilobus (17271) Leptochoerus elegans, Stibarus obtusilobus (17231) Leptochoerus quadricuspis (17297) Leptochoerus supremus (17272) Stibarus lemurinus (17098) Stibarus obtusilobus (17127 17135 17212 17216 17220 17221 17236 17240 17268 17273 17275)
Orellan	33.9 - 33.3	Canada (Saskatchewan)	Leptochoerus sp. (17111)
Orellan	33.9 - 33.3	USA (Colorado)	Leptochoerus spectabilis, Stibarus lemurinus (17081 17082)
Orellan	33.9 - 33.3	USA (Wyoming)	Stibarus quadricuspis (17110)
Whitneyan	33.3 - 30.8	USA (Colorado)	Leptochoerus spectabilis (17426)
Whitneyan	33.3 - 30.8	Canada (Saskatchewan)	Leptochoerus sp. (17372)
Whitneyan	33.3 - 30.8	USA (South Dakota)	Leptochoeridae indet. (17359) Leptochoerus sp. (17338) Leptochoerus sp., Nanochoerus sp. (17384) Leptochoerus supremus (17329) Nanochoerus sp. (17312)
Whitneyan	33.3 - 30.8	USA (Nebraska)	Leptochoerus elegans (17416) Leptochoerus spectabilis (17409 17412 17419)
Geringian	30.8 - 26.3	USA (South Dakota)	Leptochoerus sp. (17630 17644)