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Brachyhyops wyomingensis
Taxonomy
Brachyhyops wyomingensis was named by Colbert (1937) [genotype; also said to be 1938]. Its type specimen is CMNH 12048, a skull (a skull, virtually complete), and it is a 3D body fossil. Its type locality is Beaver Divide Locality 11, which is in a Chadronian terrestrial horizon in the White River Formation of Wyoming. It is the type species of Brachyhyops.
Synonymy list
| Year | Name and author |
|---|---|
| 1937 | Brachyhyops wyomingensis Colbert p. 473 |
| 1938 | Brachyhyops wyomingensis Colbert p. 88 |
| 2011 | Brachyhyops wyomingensis Tsubamoto et al. |
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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.
†Brachyhyops wyomingensis Colbert 1937
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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. | |
| E. H. Colbert 1938 | 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: Lillegraven 1979, Effinger 1998, Carroll 1988, Hendy et al. 2009, Nowak 1999 | |||||
Age range: base of the Early/Lower Chadronian to the top of the Duchesnean or 37.20000 to 37.00000 Ma
Collections (4 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Uintan - Duchesnean | USA (New Mexico) | Brachyhyops wyomingensis (16880) | |
| Duchesnean | USA (Utah) | Brachyhyops wyomingensis (16852) | |
| Duchesnean | USA (Texas) | Brachyhyops wyomingensis (16828) | |
| Early/Lower Chadronian | USA (Wyoming) | Brachyhyops wyomingensis (type locality: 16906) |