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Ithygrammodon
Taxonomy
Ithygrammodon was named by Osborn et al. (1878).
It was considered a nomen dubium by Sinclair (1914); it was considered a nomen dubium by Stucky (1998).
It was assigned to Artiodactyla by Osborn et al. (1878); to Leptotragulinae by Hay (1902); and to Helohyidae by McKenna and Bell (1997).
It was considered a nomen dubium by Sinclair (1914); it was considered a nomen dubium by Stucky (1998).
It was assigned to Artiodactyla by Osborn et al. (1878); to Leptotragulinae by Hay (1902); and to Helohyidae by McKenna and Bell (1997).
Synonymy list
| Year | Name and author |
|---|---|
| 1878 | Ithygrammodon Osborn et al. p. 56 |
| 1902 | Ithygrammodon Hay p. 674 |
| 1997 | Ithygrammodon McKenna and Bell p. 403 |
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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.
G. †Ithygrammodon Osborn et al. 1878
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| H. F. Osborn et al. 1878 | The premaxillai-ies are long, narrow, and very straight, bent slightly in on their own axis as in Camelz"dm, but ex- panded laterally at the end of symphysis as in Pecora. The upward processes are sharply defined, with a wide, rounded upper border.
The upper incisors are six in number, and are placed nearly in a straiglet line fore and aft, separated from each other and from the canine by small and subequal diastemas. The inc£sors are nearly equal in size, cylindrical in shape, are placed vertically in their alveoli, and are slightly re- curved. The spine of the premaxillaries is long and thin, giving very long anterior palatine foramina, as in Ruminantia. The premaxillaries, in position, are close together, showing a very narrow muzzle. The maxillaries have two well-developed canines, with long, laterally compressed fangs, recurved and becoming cir- cular in section at the crowns. The diastema between the canine and the first premolar is proportionate to that in Pro- came/us. |
Measurements
No measurements are available
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| Source: o = order, subc = subclass, subp = subphylum, p = phylum | |||||
| References: Kiessling 2004, Lillegraven 1979, Carroll 1988, Nowak 1999 | |||||
Collections
No collection or age range data are available