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Brachyhyops
Taxonomy
Brachyhyops was named by Colbert (1937) [also said to be 1938]. Its type is Brachyhyops wyomingensis.
It was assigned to Artiodactyla by Colbert (1937); to Choeropotamidae by Colbert (1938); to Suina by Effinger (1998); and to Entelodontidae by Foss (2007), Vislobokova (2008) and Spaulding et al. (2009).
It was assigned to Artiodactyla by Colbert (1937); to Choeropotamidae by Colbert (1938); to Suina by Effinger (1998); and to Entelodontidae by Foss (2007), Vislobokova (2008) and Spaulding et al. (2009).
Species
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1937 | Brachyhyops Colbert p. 473 |
| 1938 | Brachyhyops Colbert p. 104 |
| 1958 | Eoentelodon Chow |
| 1988 | Eoentelodon Carroll |
| 1998 | Brachyhyops Effinger p. 378 |
| 2007 | Eoentelodon Foss p. 122 |
| 2007 | Brachyhyops Foss p. 124 |
| 2008 | Brachyhyops Vislobokova |
| 2008 | Eoentelodon Vislobokova |
| 2009 | Brachyhyops Spaulding et al. p. e7062 |
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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. †Brachyhyops Colbert 1937
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†Brachyhyops neimongolensis Wang and Qiu 2002
†Brachyhyops trofimovi Dashzeveg 1976
†Brachyhyops viensis Russell 1980
†Brachyhyops wyomingensis Colbert 1937
†Brachyhyops yunnanense Chow 1958
Invalid names: Eoentelodon Chow 1958 [synonym]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| E. H. Colbert 1937 | A medium sized artiodactyl, the skull being com- parable in length to the skull of a modern peccary. Dentition 3 (?)-1-4-3; lower dentition unknown. Cheek teeth comparable in shape to those of Choeropotamus, Helohyus, Achaenodon and Parahyus, being near to the latter in size. Cranium broad, hav- ing widely separated parietal crests. Orbit closed posteriorly; situated above the last two molars. Muzzle relatively short, so that the postorbital length exceeds somewhat the preorbital length of the skull. Zygomatic arch vertically expanded behind and below the orbit, somewhat in the manner of the entelodonts. Skull trans- versely broad, due to the lateral expansion of the arches. Glenoids shallow and broad and relatively low, being about on a level with the occlusal line of the upper cheek teeth. Paroccipital processes short and pterygoids weak. Posterior nares extending to the middle of the upper third molar. Basicranium primitive. the arrangement of the foramina being like that in the dichobunids. |
Measurements
No measurements are available
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| Source: f = family, o = order, subc = subclass, c = class, subp = subphylum | |||||
| References: Effinger 1998, Lillegraven 1979, Carroll 1988, Hendy et al. 2009, Nowak 1999 | |||||
Age range: Duchesnean or 39.70000 to 37.00000 Ma
Collections (13 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Middle Eocene | China (Nei Mongol) | B. neimongolensis (61229) | |
| Middle Eocene | China (Yunnan) | Eoentelodon yunnanense (36668) | |
| Middle Eocene | China (Jiangsu) | Artiodactyla indet. (37493) | |
| Uintan - Duchesnean | USA (New Mexico) | B. wyomingensis (16880) | |
| Duchesnean | USA (Texas) | Archaeotherium mortoni (16835) B. wyomingensis (16828) | |
| Duchesnean | USA (Utah) | B. wyomingensis (16852) | |
| Chadronian | Canada (Saskatchewan) | B. viensis (17023) | |
| Chadronian | USA (Wyoming) | B. sp. (16960) | |
| Early/Lower Chadronian | USA (Wyoming) | B. wyomingensis (16906) | |
| Late/Upper Eocene | Mongolia (Dornogobi Aimag) | B. trofimovi (152082) | |
| Late/Upper Eocene | Mongolia (Dornogov) | B. sp. (176016) Eoentelodon trofimovi (174716) |