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Pliohippus coalingensis
Taxonomy
Protohippus coalingensis was named by Merriam (1914). Its type specimen is UCMP 21341, a tooth (A fourth superior premolar, p4, of the right side), and it is a 3D body fossil. Its type locality is UCMP loc. 2073, Mack Pumping Plant, site 2, which is in a Pliocene terrestrial horizon in the Etchegoin Formation of California.
It was recombined as Pliohippus (Pliohippus) coalingensis by Stirton (1940); it was synonymized subjectively with Pliohippus interpolatus by James (1963); it was recombined as Dinohippus coalingensis by Tedford et al. (1987) and Kelly and Lander (1988); it was considered a nomen dubium by Matthew and Stirton (1930), Macdonald (1992) and Kelly (1998); it was recombined as Pliohippus coalingensis by Merriam (1915), Osborn (1918), Merriam (1919), Hay (1930) and MacFadden (1998).
It was recombined as Pliohippus (Pliohippus) coalingensis by Stirton (1940); it was synonymized subjectively with Pliohippus interpolatus by James (1963); it was recombined as Dinohippus coalingensis by Tedford et al. (1987) and Kelly and Lander (1988); it was considered a nomen dubium by Matthew and Stirton (1930), Macdonald (1992) and Kelly (1998); it was recombined as Pliohippus coalingensis by Merriam (1915), Osborn (1918), Merriam (1919), Hay (1930) and MacFadden (1998).
Synonymy list
| Year | Name and author |
|---|---|
| 1914 | Protohippus coalingensis Merriam |
| 1915 | Pliohippus coalingensis Merriam |
| 1918 | Pliohippus coalingensis Osborn p. 165 figs. Text Figs. 133 |
| 1919 | Pliohippus coalingensis Merriam |
| 1930 | Pliohippus coalingensis Hay |
| 1940 | Pliohippus (Pliohippus) coalingensis Stirton p. 192 |
| 1987 | Dinohippus coalingensis Tedford et al. |
| 1988 | Dinohippus coalingensis Kelly and Lander |
| 1998 | Pliohippus coalingensis MacFadden p. 550 |
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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.
†Pliohippus coalingensis Merriam 1914
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| H. F. Osborn 1918 | (Merriam, 1914, 1915) (1) Type belonging to an animal of medium size, approaching in dimensions
Pliohippua aupremua. (2) Dilfers from P . aupremua in the heavier mesostyle, relative narrowness (in transverse diameter) of the crown even toward the base, narrower fossettes, much less plicated enamel walls of fossettes, much smaller, more nearly circular protocone. (3) Resembles P. 'jairbankai of the Ricardo approximately in size, in simplicity of fossettes, in the very small, round protocone, and weak connection of the protoloph and metaloph; (4) differs from P. fairbankai in the narrower and less curved crown of the molar teeth, the being apparently a normal char- acter of worn teeth; (5) possibly separated only by subspecific characters from P. fairbankai. (6) A larger"il.nd more progressive stage than the Pliohippus or Protohippus species of the Jacalitos. |