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Brachycrurinae

Mammalia - Merycoidodontidae

Synonymy list
YearName and author
1996Brachycrurinae Stevens and Stevens p. 510
2007Brachycrurinae Stevens and Stevens p. 166
2023Brachycrurinae Stevens et al. pp. 101 - 104

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Life
Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
Osteichthyes()
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda
Reptiliomorpha
Anthracosauria
subclassAmphibiosauriaKuhn 1967
Cotylosauria()
Amniota
subclassSynapsida
Therapsida()
infraorderCynodontia()
RankNameAuthor
Mammaliamorpha
Mammaliaformes
classMammalia
Theriamorpha(Rowe 1993)
Theriiformes()
Trechnotheria
Cladotheria
Zatheria
subclassTribosphenida()
subclassTheria
Eutheria()
Placentalia
Boreoeutheria
Laurasiatheria
Scrotifera
Euungulata
Artiodactylamorpha
Artiodactyla()
familyMerycoidodontidae
subfamilyBrachycrurinae
subfamilyBrachycrurinae

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.

Subfm. †Brachycrurinae Stevens and Stevens 1996
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G. †Brachycrus Matthew 1901
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Brachycrus laticeps Douglass 1900
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Invalid names: Brachycrus buwaldi barstowensis Schultz and Falkenbach 1940 [synonym], Brachycrus laticeps mooki Schultz and Falkenbach 1968 [invalid subgroup], Brachycrus sweetwaterensis Schultz and Falkenbach 1940 [synonym], Brachycrus vaughani Schultz and Falkenbach 1940 [synonym], Brachycrus vaughani rioosoensis Schultz and Falkenbach 1968 [synonym], Brachycrus wilsoni Schultz and Falkenbach 1940 [synonym], Brachycrus wilsoni longensis Schultz and Falkenbach 1940 [synonym], Desmatochoerus newchicagoensis Schultz and Falkenbach 1954 [synonym], Merycochoerus altiramus Douglass 1901 [synonym], Merycochoerus buwaldi Merriam 1919 [synonym], Merycochoerus elrodi Douglass 1901 [synonym], Merycochoerus madisonius Douglass 1901 [synonym]
Brachycrus rusticus Leidy 1870
Brachycrus siouense Sinclair 1915
Invalid names: Brachycrus rusticus riograndensis Schultz and Falkenbach 1968 [invalid subgroup], Pronomotherium Douglass 1907 [synonym]
Diagnosis
ReferenceDiagnosis
M. S. Stevens et al. 2023Medium- to large-sized oreodonts, with the nasal bones extremely reduced and deeply retracted narial notch. Premaxillae fused together at the anterior end, forming a spout-shaped depression in the snout that is concave transversely and convex longitudinally, and the ridges on each side of the narial opening are parallel. The premaxillae are coalesced and have a medial trough formed by the parallel ridges that buttress the external narial opening along its margin. Deep malar fossa and facial cavity anterior to the orbit. Infraorbital foramen above the M2. Posterior palate extended to the pterygoid region. Postglenoid process compressed anteroposteriorly and extended downward. Small, cylindrical bullae. Large, deep rounded angle on the lower jaw
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: terrestrialo
Locomotion: actively mobilec
Life habit: ground dwellingf
Diet: herbivoref
Reproduction: viviparoussubc
Created: 2005-08-31 14:37:21
Modified: 2005-08-31 16:37:21
Source: f = family, o = order, subc = subclass, c = class, subp = subphylum
References: Lillegraven 1979, Carroll 1988, Lander 1998, Nowak 1999, Hendy et al. 2009

Age range: base of the Hemingfordian to the top of the Late/Upper Miocene or 20.43000 to 5.33300 Ma

Collections (70 total)


Time interval Ma Country or state Original ID and collection number
Miocene23.03 - 5.333USA (Colorado) Brachycrus laticeps (19008)
Miocene23.03 - 5.333USA (California) Brachycrus laticeps (19426 19428 19597)
Miocene23.03 - 5.333USA (Nevada) Brachycrus laticeps (18838 18922 18946 19021 19127) Brachycrus sp. (18991)
Hemingfordian20.43 - 15.97USA (North Dakota) Brachycrus laticeps (17960)
Hemingfordian20.43 - 15.97USA (Nebraska) Brachycrus siouense (17917 17959) Brachycrus siouense, Brachycrus wilsoni (17990) Brachycrus sp. (17895) Brachycrus wilsoni (17920 17952 17961 18001)
Hemingfordian20.43 - 15.97USA (Colorado) Brachycrus laticeps (17908)
Hemingfordian20.43 - 15.97USA (Wyoming) Brachycrus rusticus (18907 19075) Brachycrus rusticus, Brachycrus vaughani (19074) Brachycrus sp. (19076 19077 19078 19080 19082) Brachycrus sweetwaterensis (18873 19079 19083) Brachycrus sweetwaterensis, Brachycrus vaughani (19073) Brachycrus vaughani (18872 19081)
Hemingfordian - Barstovian20.43 - 13.6USA (California) Brachycrus buwaldi (19197 19205 19243)
Late/Upper Hemingfordian - Early/Lower Barstovian20.43 - 13.6USA (Nevada) Brachycrus laticeps (18866)
Barstovian15.97 - 13.6USA (Nevada) Brachycrus laticeps (18924)
Barstovian15.97 - 13.6USA (New Mexico) Brachycrus vaughani (19520)
Barstovian15.97 - 13.6USA (Montana) Brachycrus laticeps (18894)
Barstovian15.97 - 13.6USA (Idaho) Brachycrus sp. (19013)
Barstovian15.97 - 13.6USA (California) Brachycrus buwaldi (19135 19153 19195 19330 19452 19557) Brachycrus laticeps (19273 19332 19356 19458 19472 19567) Merycochoerus buwaldi (19162)
Early/Lower Barstovian15.97 - 13.6USA (Nebraska) Brachycrus laticeps (18019) Brachycrus siouense (17905 17911 17919 17955 17976 17983 17995 17996 18004 18011)
Early/Lower Barstovian15.97 - 13.6USA (New Mexico) Brachycrus laticeps (19547)
Early/Lower Barstovian15.97 - 13.6USA (California) Brachycrus sp. (93107)
Middle Miocene15.97 - 11.608USA (Colorado) Brachycrus laticeps (18979)
Late/Upper Miocene11.608 - 5.333USA (Wyoming) Brachycrus sp. (19043)