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Heteromeryx
Taxonomy
Heteromeryx was named by Matthew (1905). It is not extant.
It was assigned to Hypertragulidae by Matthew (1905); to Leptomerycinae by Scott (1940); and to Protoceratidae by Carroll (1988), Prothero (1998), Prothero and Ludtke (2007).
It was assigned to Hypertragulidae by Matthew (1905); to Leptomerycinae by Scott (1940); and to Protoceratidae by Carroll (1988), Prothero (1998), Prothero and Ludtke (2007).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1905 | Heteromeryx Matthew |
| 1940 | Heteromeryx Scott p. 554 |
| 1988 | Heteromeryx Carroll |
| 1998 | Heteromeryx Prothero p. 434 |
| 2007 | Heteromeryx Prothero and Ludtke 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.
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| W. D. Matthew 1905 | Skull rather short, orbits complete behind, situate over the posterior molars, muzzle elongate, nasals considerably reduced. Teeth very short crowned, molars with heavy internal cingula and rudimentary mesos1!yle. Four premolars, the first small, simple, with lol)g diastemata before and behind it, the others much as in Leptomeryx . Ulna with well-developed shaft, co- ossified with radius along its entire length. Manus functionally tetradactyl, with four separate digits as in Leptomeryx. Magnum and cuneiform fused. Distal end of fibula separate from tibia; shaft a small vestigial spine. Pes didactyl, with separate metatarsals, cuboid and navicular distinct, ecto- and meso-cuneiform fused. Ungual phalanges short and compressed. |