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Merychippus isonesus quintus
Taxonomy
Merychippus isonesus quintus was named by Osborn (1918) [named as Merychippus isonesus quintus by Osborn 1918; raised to species level]. Its type specimen is AMNH 14185, a partial skeleton (Upper and lower dentition and a large part of a skeleton), and it is a 3D body fossil.
It was recombined as Stylonus quintus by Kelly and Lander (1988); it was recombined as Merychippus quintus by Dorr and Wheeler (1964) and Kelly (1995).
It was recombined as Stylonus quintus by Kelly and Lander (1988); it was recombined as Merychippus quintus by Dorr and Wheeler (1964) and Kelly (1995).
Synonymy list
| Year | Name and author |
|---|---|
| 1918 | Merychippus isonesus quintus Osborn p. 107 figs. Plates 13.7,7a, 14.1, 41.4, 45.2,5, 46.4. Text Fig. 81 |
| 1964 | Merychippus quintus Dorr, Jr. and Wheeler p. 323 |
| 1988 | Stylonus quintus Kelly and Lander |
| 1995 | Merychippus quintus Kelly |
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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 isonesus quintus Osborn 1918
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| H. F. Osborn 1918 | (Matthew, 1913, Osborn, 1918) (1) The type a larger animal than any of the preceding premutations, approaching M. sever8U8 in the plications of tne enamel; (2) crochet bifid, i. e. with a large spur projecting into the pre- fossette and a large inferior pli caballin fold; (3) protocone separate from protoconule in little worn molars, uniting with protoconule in molars one-fourth worn; (4) protocone elongate anteroposteriorly in pLm3; (5) metaloph sending a single fold into prefossette, and from one to two folds into postfossette; (6) shafts of limbs robust; (7) metapodials robust; (8) shafts of lateral digits and lateral phalanges much heavier than in M. isone8WJ secundus and M. isonesus tertius. |
Measurements
No measurements are available
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| Source: subf = subfamily, subc = subclass, c = class, subp = subphylum | |||||
| References: Nowak 1991, MacFadden 1998, Hendy et al. 2009, Lillegraven 1979, Ji et al. 2002, Carroll 1988 | |||||
Collections
No collection or age range data are available