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Parahippus pawniensis atavus
Taxonomy
Parahippus pawniensis atavus was named by Osborn (1918) [named as subspecies of P. pawniensis by Osborn 1918; nomen dubium according to Macdonald 1992; first raised to species level]. Its type specimen is AMNH 14233, a partial skeleton (Occiput of skull with a consiqerable part of the skeleton, in excellent preservation, C 1, 4-7, dorsals, fore and hind limbs), and it is a 3D body fossil.
It was recombined as Parahippus atavus by Coombs and Coombs (1997).
It was recombined as Parahippus atavus by Coombs and Coombs (1997).
Synonymy list
| Year | Name and author |
|---|---|
| 1918 | Parahippus pawniensis atavus Osborn p. 79 figs. Plates 38, 39.9,13. T ext Fig. 56 |
| 1997 | Parahippus atavus Coombs and Coombs, Jr. p. 173 |
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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.
†Parahippus pawniensis atavus Osborn 1918
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| H. F. Osborn 1918 | (Matthew, 1913, Osborn 1918) (1) Size of the type of Parahippus pawniensis. (2) Pes slender, lateral
digits relatively unreduced; (3) Mts. III somewhat smaller than in the type of P. pawniensis, with smaller cuboid fossette; (4) lateral digits as in P. pawniensis; (5) limbs moderately long; (6) ulna slender, separate throughout; (7) manus moder- ately long, lateral digits not greatly reduced; (8) Mtc. V a small splint; (9) phalanges longer relatively than in.Miohippus; (10) ungual phalanges narrow; (11) Mts. III articulation with cuboid oblique, broader and better defined than in Mio- hippus. (12) Occiput high and narrow; (13) condylar facets extended over basioccipital; (14) occipital surface separate and distinct. |
Measurements
No measurements are available
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| Source: f = family, subc = subclass, c = class, subp = subphylum | |||||
| References: Nowak 1991, Hendy et al. 2009, Carroll 1988, Lillegraven 1979, Ji et al. 2002 | |||||
Collections
No collection or age range data are available