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Equus conversidens
Taxonomy
Equus conversidens was named by Owen (1869) [holotype is IGM 4008?? ]. Its type specimen is IGM 403, a partial skull ( the maxillaries and part of the palate, with right and left P2-M3, of a small young adult horse), and it is a 3D body fossil.
It was synonymized subjectively with Equus tau by Cope (1884) and Miller (1976); it was recombined as Asinus conversidens by Quinn (1957); it was recombined as Equus (Hemionus) conversidens by Skinner (1972); it was synonymized subjectively with Equus alaskae by Harris (1993).
It was synonymized subjectively with Equus tau by Cope (1884) and Miller (1976); it was recombined as Asinus conversidens by Quinn (1957); it was recombined as Equus (Hemionus) conversidens by Skinner (1972); it was synonymized subjectively with Equus alaskae by Harris (1993).
Sister species lacking formal opinion data
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1869 | Equus conversidens Owen |
| 1884 | Equus barcenaei Cope p. 15 |
| 1901 | Equus conversidens Gidley p. 118 |
| 1902 | Equus conversidens Hay p. 623 |
| 1924 | Equus barcenaei Hay |
| 1930 | Equus barcenaei Hay |
| 1942 | Equus conversidens Skinner |
| 1955 | Equus conversidens Hibbard |
| 1957 | Asinus conversidens Quinn |
| 1959 | Onager zoyatalis Mooser |
| 1960 | Equus conversidens Hibbard and Taylor |
| 1964 | Equus conversidens Dalquest |
| 1965 | Equus conversidens Dalquest and Hughes |
| 1966 | Equus conversidens Slaughter p. 89 |
| 1970 | Equus conversidens Lundelius and Stevens p. 152 |
| 1972 | Equus (Hemionus) conversidens Skinner p. 125 |
| 1979 | Equus conversidens Dalquest p. 241 |
| 1980 | Equus conversidens Kurten and Anderson p. 291 |
| 1987 | Equus conversidens Carranza-Castaneda and Miller p. 338 |
| 2005 | Equus conversidens Cisneros p. 249 |
| 2007 | Equus conversidens Morgan and Rinehart p. 44 |
| 2014 | Equus conversidens Alberdi 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.
†Equus conversidens Owen 1869
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Invalid names: Equus barcenaei Cope 1884 [synonym], Onager zoyatalis Mooser 1959 [synonym]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| M. T. Alberdi et al. 2014 | The skull fragment IGM4008 (Holotype; No. 403 old number) is constituted mostly by the rostral portion, with the maxilla and teeth in situ. Each dental series includes three molars and three premolars. The premolars exceed the true molars in size (pl. LXI, fig. 1; Owen, 1869). The upper cheek teeth are middle in size, with elongate flattened protocones, derived features and average complexly plicate enamel similar to E. mexicanus but smaller in size. Lower molars have similar morphology but smaller in size than E. mexicanus teeth. Following Winans (1989), the ratio of length to proximal width is generally less than 5.0 for metacarpals and 6.0 for metatarsals. Metapodials are not stilt-legged. The body mass from MCIII13 is between 215.63 to 282.52 kg and the mean is 249.08 kg. |