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Ustatochoerinae
Taxonomy
Ustatochoerinae was named by Stevens and Stevens (1996). Its type is Ustatochoerus.
It was assigned to Merycoidodontidae by Stevens and Stevens (1996), Stevens and Stevens (2007) and Stevens et al. (2023).
It was assigned to Merycoidodontidae by Stevens and Stevens (1996), Stevens and Stevens (2007) and Stevens et al. (2023).
Subtaxa
Mediochoerus, Ustatochoerus (type genus)
Synonymy list
| Year | Name and author |
|---|---|
| 1996 | Ustatochoerinae Stevens and Stevens p. 510 |
| 2007 | Ustatochoerinae Stevens and Stevens p. 164 |
| 2023 | Ustatochoerinae Stevens et al. p. 117 figs. Figure 95 |
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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.
Subfm. †Ustatochoerinae Stevens and Stevens 1996
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G. †Mediochoerus Schultz and Falkenbach 1941
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†Mediochoerus blicki Schultz and Falkenbach 1941
†Mediochoerus johnsoni Schultz and Falkenbach 1941
†Mediochoerus mohavensis Schultz and Falkenbach 1941
G. †Ustatochoerus Schultz and Falkenbach 1941
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†Ustatochoerus californicus Merriam 1919
†Ustatochoerus leptoscelos Stevens et al. 1969
†Ustatochoerus major Leidy 1858
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Invalid names: Merychyus (Metoreodon) profectus Matthew and Cook 1909 [synonym], Merychyus major major Leidy 1859 [invalid subgroup], Ustatochoerus major texanus Schultz and Falkenbach 1941 [invalid subgroup], Ustatochoerus profectus espanolensis Schultz and Falkenbach 1941 [invalid subgroup], Ustatochoerus profectus nevadaensis Schultz and Falkenbach 1968 [invalid subgroup], Ustatochoerus profectus studeri Schultz and Falkenbach 1941 [invalid subgroup], Ustatochoerus skinneri Schultz and Falkenbach 1941 [synonym], Ustatochoerus skinneri santacruzensis Schultz and Falkenbach 1941 [invalid subgroup]
†Ustatochoerus medius Leidy 1858
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†Ustatochoerus medius novomexicanus Frick 1929
Invalid names: Merychyus medius novomexicanus Frick 1929 [invalid subgroup], Merycochoerus coenopus Scott 1890 [synonym], Merycochoerus compressidens Douglass 1901 [synonym]
†Ustatochoerus medius mohavensis Schultz and Falkenbach 1941
†Ustatochoerus tedfordi Stevens et al. 2023
Invalid names: Ustatochoerus californicus raki Schultz and Falkenbach 1941 [invalid subgroup]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| M. S. Stevens et al. 2023 | Oreodonts with relatively hypsodont cheek teeth, molars which narrow anteriorly, prominent labial cusps on P1 and P3, prominent labial cingula on the premolars except on the conical P1/p1, and a tendency towards early molarization of the premolars. The narial notch is retracted to at least the level of P4 (and sometimes M1), but there are no facial vacuities as in other taxa with retracted nasals. There is a fan-shaped occipital region, and a posterior extension of the palate toward the pterygoid region. |