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Calippus maccartyi
Taxonomy
Calippus (Grammohippus) maccartyi was named by Hulbert (1988). Its type specimen is UF 69951, a partial skull (badly crushed anterior half of skull of adult male with R and L Il-!3, C, P2 and L P3-M3), and it is a 3D body fossil.
It was recombined as Calippus maccartyi by MacFadden (1998).
It was recombined as Calippus maccartyi by MacFadden (1998).
Synonymy list
Year | Name and author |
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1988 | Calippus (Grammohippus) maccartyi Hulbert, Jr. p. 276 figs. 20 - 21 |
1998 | Calippus maccartyi 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 maccartyi Hulbert, Jr. 1988
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Diagnosis
Reference | Diagnosis | |
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R. C. Hulbert 1988 | Small species of C. (Grammohippus) with toothrow lengths of about 100 mm. Preprotoconal groove deep, persistent. Protocones elongate, not short as in C. hondurensis; lingual borders rounded to slightly flattened; oriented slightly obliquely. Hypoconal groove open until mid-wear; forms lakes on P2-P4. Pli caballin small, single; fades with wear; vestigial or absent in molars. Plications simple but persistent, not lost until heavy wear. Upper cheekteeth not as curved as other species of Grammohippus. Lower cheekteeth with widely expanded metaconids and metastylids; lingual flexids more persistent than other species; variable protostylids; enamel plications in early wear-stages. Ectoflexid shallow on p2-p4, only moderately deep on m1- m3. Muzzle width about 60% of UTRL. |
Measurements
No measurements are available
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Source: g = genus, subf = subfamily, subc = subclass, c = class, subp = subphylum | |||||
References: Nowak 1991, MacFadden 1998, Lillegraven 1979, Carroll 1988, MacFadden and Cerling 1996, Hendy et al. 2009, Ji et al. 2002 |
Age range: Hemphillian or 10.30000 to 4.90000 Ma
Collections (2 total)
Time interval | Ma | Country or state | Original ID and collection number |
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Hemphillian | USA (Florida) | Calippus maccartyi (18564) Pliohippus hondurensis (18601) |