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Tapochoerus
Taxonomy
Tapochoerus was named by McKenna (1959). Its type is Hyopsodus egressus.
It was assigned to Homacodontinae by McKenna (1959); to Diacodexinae by Golz (1976), McKenna and Bell (1997); to Antiacodontinae by Carroll (1988), Stucky (1998); and to Diacodexeidae by Theodor et al. (2007).
It was assigned to Homacodontinae by McKenna (1959); to Diacodexinae by Golz (1976), McKenna and Bell (1997); to Antiacodontinae by Carroll (1988), Stucky (1998); and to Diacodexeidae by Theodor et al. (2007).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1959 | Tapochoerus McKenna p. 126 |
| 1976 | Tapochoerus Golz |
| 1988 | Tapochoerus Carroll |
| 1997 | Tapochoerus McKenna and Bell p. 401 |
| 1998 | Tapochoerus Stucky p. 364 |
| 2007 | Tapochoerus Theodor et al. p. 41 |
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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. †Tapochoerus McKenna 1959
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†Tapochoerus egressus Stock 1934
†Tapochoerus mcmillini Walsh 2000
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| M. C. McKenna 1959 | Primitive dichobunid artiodactyl in which the teeth are more bunodont than selenodont; the hypocone is retained on M^ and/or M-, the metaconules are large but are neither hypertrophied nor markedly displaced and, when unworn, possess five posterior crests; there is neither a mesostyle nor ectoloph ribbing on M^ and/or M-, strong diastemata isolate the double-rooted Po; P3 is trenchant and lacks a metaconid; P^ is also trenchant but possesses a distinct entoconid and a metaconid which separates from the protoconid high on the crown; Mi has a strong paraconid separated from the metaconid but not as widely separated as in Antiacodon or Auxontodon, Mo has a variably separated paraconid, and Mg has a fused single lingual trigonid cusp; all the lower molars are elongate, with hypo- conulids closely similar to those of Hexacodus. |
Measurements
No measurements are available
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| Source: o = order, subc = subclass, subp = subphylum, p = phylum | |||||
| References: Nowak 1999, Carroll 1988, Lillegraven 1979, Kiessling 2004 | |||||
Age range: Early/Lower Uintan or 46.20000 to 39.70000 Ma
Collections (9 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Early/Lower Uintan | USA (California) | T. mcmillini (16695 16776) | |
| Late/Upper Uintan | USA (California) | T. egressus (16553 16554) T. mcmillini (16585 16781) | |
| Uintan | USA (California) | Hyopsodus egressus (16786) T. egressus (16790 16791) |