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Calippus hondurensis
Taxonomy
Pliohippus hondurensis was named by Olson and McGrew (1941). Its type locality is Rancho Lobo, which is in a Hemphillian terrestrial horizon in the Gracias Formation of Honduras.
It was recombined as Calippus (Grammohippus) hondurensis by Hulbert (1988); it was recombined as Calippus hondurensis by MacFadden (1998) and Kelly (1998).
It was recombined as Calippus (Grammohippus) hondurensis by Hulbert (1988); it was recombined as Calippus hondurensis by MacFadden (1998) and Kelly (1998).
Synonyms
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Synonymy list
Year | Name and author |
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1886 | Protohippus castilli Cope |
1893 | Protohippus castilli Cope p. 26 |
1902 | Merychippus castilli Hay p. 616 |
1907 | Protohippus castilli Gidley p. 901 |
1918 | Protohippus castilli Osborn p. 141 figs. Text Fig. 113 |
1940 | Pliohippus (Pliohippus) castilli Stirton p. 192 |
1941 | Pliohippus hondurensis Olson and McGrew |
1988 | Calippus (Grammohippus) hondurensis Hulbert, Jr. p. 271 figs. 15H - 15I |
1994 | Calippus (Grammohippus) castilli Carranza-Castaneda and Espinosa-Arrubarrena p. 185 |
1998 | Calippus hondurensis Kelly |
1998 | Calippus hondurensis 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.
†Calippus hondurensis Olson and McGrew 1941
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Invalid names: Calippus castilli Cope 1886 [synonym]
Diagnosis
Reference | Diagnosis | |
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H. F. Osborn 1918 (Protohippus castilli) | (Cope, 1885, Osborn, 1917) (1) Of larger size than the type of Hipparion peninsulatum; (2) protocone larger and more prominent than hypocone, connected with protoconule and metaconule respectively; (3) crown of molar of medium length, strongly curved inward; (4) grinding surface a little wider than long; (5) fossettes subtriangular, strongly convex inward, each with one large and one smaller enamel fold; (6) external styles prominent. | |
R. C. Hulbert 1988 | Smaller than C. mmtini or "Protohippus" castilli, with moderately worn toothrow lengths of about 101 to 112 mm. Unworn molar crown height about 55 mm. Protocone small, oval, with persistent preprotoconal groove and flattened lingual border. Hypoconal groove shallow; persistently open until late wear-stages in molars; closed earlier in premolars, without hypoconallakes on P34. Molars with pli caballins in early wear. Ectoflexid generally shallower than in C. cerasinus, rarely penetrating isthmus in p2-p4. Large metastylid on p34. Protostylids variably developed. |