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Merychippus gunteri
Taxonomy
Merychippus gunteri was named by Simpson (1930). Its type locality is Midway, which is in a Hemingfordian terrestrial horizon in the Torreya Formation of Florida.
It was recombined as Merychippus (Merychippus) gunteri by Stirton (1940); it was recombined as Hippodon gunteri by Quinn (1955); it was synonymized subjectively with Parahippus leonensis by Bader (1956).
It was recombined as Merychippus (Merychippus) gunteri by Stirton (1940); it was recombined as Hippodon gunteri by Quinn (1955); it was synonymized subjectively with Parahippus leonensis by Bader (1956).
Synonymy list
| Year | Name and author |
|---|---|
| 1930 | Merychippus gunteri Simpson |
| 1940 | Merychippus (Merychippus) gunteri Stirton p. 181 |
| 1955 | Hippodon gunteri Quinn p. 13 |
| 1975 | Merychippus gunteri Forsten p. 22 figs. Tables 11, 29; Fig. 4 |
| 1991 | Merychippus gunteri Hulbert, Jr. and MacFadden |
| 1995 | Merychippus gunteri Kelly p. 25 |
| 1998 | Merychippus gunteri MacFadden p. 547 |
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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.
†Merychippus gunteri Simpson 1930
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. H. Quinn 1955 | Molars subhypsodont, about as in M. primus. Upper cheek teeth relatively short and broad, with strong external ridges. Protocone· relatively small, almost circular, with spur, and
united to protoconule near apex. Pli caballin simple but normally present. One or two well de- fined folds on each side of the metaloph. Metastylid feebly separated on P. 2,strongly distinct and simple, elongate. Lower incisor series somewhat less transverse than in M. primus. | |
| A. -M. Forsten 1975 | Simpson (1930, p. 165, in Quinn, 1955, p. 13): Molars subhypsodont, about as in M. primus. Upper cheek teeth relatively short and broad, with strong external ridges. Protocone relatively small, almost circular, with spur, and united to protoconule near apex. Pli caballin simple but normally present. One or two well defined folds on each side of the metaloph. Metastylid feebly separated on lower P2, strongly distinct on other lower cheek teeth. Heel of M3 small and simple, elongate. |
Measurements
No measurements are available
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| Source: subf = subfamily, subc = subclass, c = class, subp = subphylum | |||||
| References: Ji et al. 2002, Carroll 1988, Nowak 1991, MacFadden 1998, Hendy et al. 2009, Lillegraven 1979 | |||||
Age range: base of the Hemingfordian to the top of the Barstovian or 18.50000 to 12.50000 Ma
Collections (28 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Miocene | USA (Florida) | Merychippus gunteri (18503) | |
| Miocene | USA (Nevada) | Merychippus gunteri (18922) | |
| Miocene | USA (Texas) | Merychippus francisi (18680) Merychippus gunteri (18648 18658 18677) Merychippus perditus (18614) | |
| Hemingfordian | USA (Florida) | Merychippus gunteri (type locality: 18561 176936) | |
| Late/Upper Hemingfordian | USA (Florida) | Merychippus gunteri (18512) | |
| Hemingfordian - Barstovian | USA (Texas) | Merychippus gunteri (18688 18691 18695 18704) | |
| Barstovian | USA (Texas) | Equidae indet. (18619 18627) Merychippus gunteri (18607 18608 18620 18637 18646 18650) | |
| Barstovian | USA (Louisiana) | Merychippus gunteri (18621 18632) | |
| Early/Lower Barstovian | USA (Texas) | Merychippus perditus (18682) | |
| Early/Lower Barstovian | USA (Florida) | Merychippus gunteri (18538 18549) | |
| Middle Miocene | USA (Florida) | Merychippus gunteri (18582) |