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Protohippus tantalus
Taxonomy
Protohippus tantalus was named by Merriam (1913). Its type specimen is UCMP 19434 and 21221, a set of teeth (Two large upper cheek teeth), and it is a 3D body fossil. Its type locality is Ricardo, which is in a Clarendonian terrestrial horizon in the Dove Spring Formation of California.
It was recombined as Pliohippus (Pliohippus) tantalus by Stirton (1940); it was synonymized subjectively with Pliohippus fairbanksi by MacFadden (1998); it was considered a nomen dubium by Macdonald (1992); it was recombined as Pliohippus tantalus by Merriam (1913), Merriam (1915), Osborn (1918), Kelly (1995) and Kelly (1998).
It was recombined as Pliohippus (Pliohippus) tantalus by Stirton (1940); it was synonymized subjectively with Pliohippus fairbanksi by MacFadden (1998); it was considered a nomen dubium by Macdonald (1992); it was recombined as Pliohippus tantalus by Merriam (1913), Merriam (1915), Osborn (1918), Kelly (1995) and Kelly (1998).
Synonyms
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Synonymy list
Year | Name and author |
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1913 | Pliohippus tantalus Merriam |
1913 | Protohippus tantalus Merriam p. 440 fig. 4 |
1915 | Pliohippus fairbanksi Merriam |
1915 | Pliohippus tantalus Merriam p. 54 |
1915 | Pliohippus fairbanksi Merriam p. 55 figs. 8a - 8c |
1918 | Pliohippus tantalus Osborn p. 162 figs. Text Fig. ,130 |
1918 | Pliohippus fairbanksi Osborn p. 164 figs. Text Fig. 131 |
1940 | Pliohippus (Pliohippus) tantalus Stirton p. 192 |
1995 | Pliohippus tantalus Kelly p. 14 |
1998 | Pliohippus tantalus Kelly p. 11 |
1998 | Pliohippus fairbanksi 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.
†Protohippus tantalus Merriam 1913
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Diagnosis
Reference | Diagnosis | |
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H. F. Osborn 1918 | (Merriam, 1913, p. 440) (1) Protocone and protoconule united; (2) crown curved; (3) fossettes large, wide, with complicated enamel on both borders of the metaloph, and with single projections into pre- and post-fossettes; (4) a single crochet fold in the prefossette; (5) a pli caballin; (6) outer styles heavy and narrow, noticeably above the base. |