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Miohippus taxus
Taxonomy
Altippus taxus was named by Douglass (1908) [genotype]. Its type specimen is CM 836, a partial skeleton (parts of a skull, the greater portion of a mandible, a radius, portions of two femora, a tibia, a nearly complete hind foot, other bones of toes, and numerous f), and it is a 3D body fossil. Its type locality is Woodin, which is in a Harrisonian terrestrial horizon in Montana.
It was recombined as Parahippus taxus by Osborn (1918) and Hay (1930); it was recombined as Miohippus taxus by Schlaikjer (1937), Stirton (1940) and Jahns (1940); it was considered a nomen dubium by Tabrum and Nichols (2001).
It was recombined as Parahippus taxus by Osborn (1918) and Hay (1930); it was recombined as Miohippus taxus by Schlaikjer (1937), Stirton (1940) and Jahns (1940); it was considered a nomen dubium by Tabrum and Nichols (2001).
Synonymy list
| Year | Name and author |
|---|---|
| 1908 | Altippus taxus Douglass p. 271 figs. Pl. LXVII, Figs. 3 and 4; Pl. LXVIII, Figs. 6-8 |
| 1918 | Parahippus taxus Osborn p. 85 fig. 62 |
| 1930 | Parahippus taxus Hay |
| 1937 | Miohippus taxus Schlaikjer p. 272 |
| 1940 | Miohippus taxus Jahns p. 184 |
| 1940 | Miohippus taxus Stirton p. 172 |
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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.
†Miohippus taxus Douglass 1908
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| H. F. Osborn 1918 | (Douglass, 19081 Osborn, 1918) (1) Metaloph separate from ectoloph; (2) protoloph and metaloph of m1- 2 rather sharp and continuous; (3) protoconule small but well defined; (4) no crochet indicated on metaloph, in which metaconule is very faintly indicated; (5) hypostyle moderately large, subtriangular; (6) parastyle small; (7) mesostyle sessile and thin; (8) faint ridges on paracone and metacone. (9) Limbs elongate, metapodials unusually long and slender, metatarsals nearly the same length as the radius; (10) ungual phalanges long and narrow; (11) tibia nearly one-fourth longer than radius; (12) pes anisotridactylous. |
Measurements
No measurements are available
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| Source: f = family, subc = subclass, c = class, subp = subphylum | |||||
| References: Nowak 1991, Lillegraven 1979, Ji et al. 2002, Carroll 1988, Hendy et al. 2009 | |||||
Age range: Harrisonian or 24.80000 to 18.50000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Harrisonian | USA (Montana) | Altippus taxus (type locality: 17861) |