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Calippus (Calippus)
Taxonomy
Calippus (Calippus) was named by Matthew and Stirton (1930). It was considered monophyletic by Hulbert (1988).
It was assigned to Calippus by Hulbert (1988) and Prado and Alberdi (1996).
It was assigned to Calippus by Hulbert (1988) and Prado and Alberdi (1996).
Synonymy list
| Year | Name and author |
|---|---|
| 1930 | Calippus (Calippus) Matthew and Stirton |
| 1988 | Calippus (Calippus) Hulbert, Jr. p. 234 |
| 1996 | Calippus (Calippus) Prado and Alberdi p. 676 |
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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.
Subg. †Calippus (Calippus) Matthew and Stirton 1930
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| R. C. Hulbert 1988 | Relatively very small, hypsodont equids with UTRL and ltrlless than 105 mm. Elongate, elliptical protocones that connect immediately to the protoselene at onset of wear. Pli caballin single, relatively small or absent; absent or only present in very early wear- stages of molars; usually present through middle wear-stages of premolars. Upper cheekteeth relatively straight; styles reduced; shallow hypoconal groove closed by a hypostylar fold in early or middle wear-stages, lost or persists as an isolated fossette in advanced wear-stages. Protostylids present on p3-m3 and dp3-dp4. Muzzle width relatively very broad, exceeds 50% of UTRL. |
Measurements
No measurements are available
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| Source: g = genus, subf = subfamily, subc = subclass, c = class, subp = subphylum | |||||
| References: Lillegraven 1979, MacFadden and Cerling 1996, Hendy et al. 2009, MacFadden 1998, Ji et al. 2002, Nowak 1991, Carroll 1988 | |||||