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Desmatippus crenidens
Taxonomy
Desmatippus crenidens was named by Scott (1893) [genotype]. Its type specimen is PU 10430, a partial skeleton (the dentition of both jaws, lacking the incisors, canines, first lower premolar and last upper molar, the mandible, portions of the radius and ulna, femur, manu), and it is a 3D body fossil. It is the type species of Desmatippus.
It was recombined as Anchitherium crenidens by Cope (1894) and Matthew (1899); it was synonymized subjectively with Anchippus brevidens by Gidley (1904); it was recombined as Parahippus crenidens by Gidley (1907), Osborn (1918), Hay (1930), Schlaikjer (1937) and Stirton (1940).
It was recombined as Anchitherium crenidens by Cope (1894) and Matthew (1899); it was synonymized subjectively with Anchippus brevidens by Gidley (1904); it was recombined as Parahippus crenidens by Gidley (1907), Osborn (1918), Hay (1930), Schlaikjer (1937) and Stirton (1940).
Synonymy list
| Year | Name and author |
|---|---|
| 1893 | Desmatippus crenidens Scott p. 661 |
| 1894 | Anchitherium crenidens Cope p. 791 |
| 1899 | Anchitherium crenidens Matthew |
| 1902 | Desmatippus crenidens Hay p. 615 |
| 1907 | Parahippus crenidens Gidley p. 881 |
| 1918 | Parahippus crenidens Osborn p. 90 figs. Plates 8.4, 9.2. Text Fig. 67 |
| 1930 | Parahippus crenidens Hay |
| 1937 | Parahippus crenidens Schlaikjer p. 272 |
| 1940 | Parahippus crenidens Stirton p. 177 |
| 1987 | Desmatippus crenidens Tedford et al. |
| 1994 | Desmatippus crenidens Fremd |
| 1998 | Desmatippus crenidens MacFadden p. 546 |
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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.
†Desmatippus crenidens Scott 1893
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| W. B. Scott 1893 | Posterior transverse crests of upper cheek teeth sinuous; limbs elongate and slender; size moderate. | |
| H. F. Osborn 1918 | (Scott, 1893, p. 661) "Posterior transverse crests of upper cheek teeth sinuous; limbs elongate and slender; size moderate." Generic characters. (Scott, 1894, p. 84) Molars and premolars short crowned, the valleys more or less filled with a thin deposit of cement. In the upper series the posterior transverse crest [metaloph] is connected with the outer wall [ectoloph] and sends forward a process [crochet] which extends to the anterior conule [proto- conule]. Inner cusps of lower teeth expanded so as to narrow the entrances to the valleys. Median inner cusps (a, a1 of Riitimeyer) much distinctly separated than in the older genera.
From this clear description and the type figures may be added: (1) anterior enamel border in the region of the crochet crenulate or ptychoid; (2) hypostyle triangular, well developed; (3) cingulum feebly developed on outer wall of p2-m1 (Osborn, 1918) (1) Grinding teeth brachyodont; (2) superior premolars with little cement; (3) cement on ectoloph and in upper and postfossettes of m3, also in outer valleys of })2-m2 ; (4) lower premolars and molars with strong external cingulum; (5) internal cingulum on superior premolars; (6) metaloph of m1 longer than protoloph; (7) hypostyle sub- triangular; (8) crochet on m3, probably worn from other teeth; (9) metaloph .and protoloph uniting with ectoloph; (10) external ribs slightly developed. This animal agrees with the P. nebrasce'Mia group of Parahippm except that (11) it exhibits cement on the grinding teeth. |
Measurements
No measurements are available
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| Source: f = family, subc = subclass, c = class, subp = subphylum | |||||
| References: Nowak 1991, Carroll 1988, Lillegraven 1979, Ji et al. 2002, Hendy et al. 2009 | |||||
Collections
No collection or age range data are available