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Haplohippus
Taxonomy
Haplohippus was named by McGrew (1953). It is not extant. Its type is Haplohippus texanus.
It was assigned to Equidae by Carroll (1988) and Prothero and Schoch (1989); and to Hyracotheriinae by McGrew (1953) and MacFadden (1998).
It was assigned to Equidae by Carroll (1988) and Prothero and Schoch (1989); and to Hyracotheriinae by McGrew (1953) and MacFadden (1998).
Species
H. texanus (type species)
Synonymy list
| Year | Name and author |
|---|---|
| 1953 | Haplohippus McGrew |
| 1988 | Haplohippus Carroll |
| 1989 | Haplohippus Prothero and Schoch p. 531 |
| 1998 | Haplohippus MacFadden p. 543 |
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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.
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| P. O. McGrew 1953 | Height of cheek teeth approximately as in Epihippus; lower premolars without and lower molars with external cingula;
P2 not molariform, with single anterior cusp and poorly distinguished posterior cusps; P^ partially molariform with incomplete lophids; P4 and molars with distinct entoconids and low parastylids; symphysis long. |
Measurements
No measurements are available
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| Source: f = family, subc = subclass, c = class, subp = subphylum | |||||
| References: Nowak 1991, Hendy et al. 2009, Carroll 1988, Lillegraven 1979, Ji et al. 2002 | |||||
Age range: base of the Duchesnean to the top of the Middle Eocene or 39.70000 to 37.71000 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Middle Eocene | USA (Oregon) | H. texanus (16842) | |
| Duchesnean | USA (Texas) | H. texanus (16828) |