| Basic info | Taxonomic history | Classification | Included Taxa |
| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Systemodon tapirinus
Taxonomy
Orohippus tapirinus was named by Cope (1875). Its type specimen is USNM 1064, a mandible (right mandible fragment with P3–M3), and it is a 3D body fossil.
It was recombined as Hyracotherium tapirinus by Cope (1877), Hay (1899), Matthew (1899), Troxell (1922), Radinsky (1963); it was recombined as Hyracotherium tapirinum by Wortman (1896), MacFadden (1998); it was recombined as Eohippus tapirinus by Hay (1902), Peterson (1919); it was considered a nomen dubium by Granger (1908); it was recombined as Systemodon tapirinus by Cope (1882), Cope (1884), Froehlich (1999), Froehlich (2002).
It was recombined as Hyracotherium tapirinus by Cope (1877), Hay (1899), Matthew (1899), Troxell (1922), Radinsky (1963); it was recombined as Hyracotherium tapirinum by Wortman (1896), MacFadden (1998); it was recombined as Eohippus tapirinus by Hay (1902), Peterson (1919); it was considered a nomen dubium by Granger (1908); it was recombined as Systemodon tapirinus by Cope (1882), Cope (1884), Froehlich (1999), Froehlich (2002).
Synonymy list
| Year | Name and author |
|---|---|
| 1875 | Orohippus tapirinus Cope p. 20 |
| 1877 | Hyracotherium tapirinus Cope |
| 1882 | Systemodon tapirinus Cope p. 183 |
| 1884 | Systemodon tapirinus Cope |
| 1896 | Hyracotherium tapirinum Wortman |
| 1899 | Hyracotherium tapirinus Hay p. 593 |
| 1899 | Hyracotherium tapirinus Matthew |
| 1902 | Eohippus tapirinus Hay p. 610 |
| 1919 | Eohippus tapirinus Peterson p. 103 |
| 1922 | Hyracotherium tapirinus Troxell |
| 1963 | Hyracotherium tapirinus Radinsky |
| 1998 | Hyracotherium tapirinum MacFadden p. 542 |
| 1999 | Systemodon tapirinus Froehlich |
| 2002 | Systemodon tapirinus Froehlich p. 183–184 |
Is something missing? Join the Paleobiology Database and enter the data
|
|
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.
†Systemodon tapirinus Cope 1875
show all | hide all
Invalid names: Systemodon cristatus Wortman 1896 [synonym]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| D. J. Froehlich 2002 | This taxon has no identified unambiguous autapomorphies but it can be diagnosed by the characters it shares with Cymbalophus. The synapomorphies include the following characters: upper molar parastyle small (Character 38, 2 to 1), M3 smaller than M2, M3 larger than M2 (Character 67, 2 to 1), P4 entoconid small and variable (Character 75, 2 to 1), and M3 hypoconulid connection forming a triple junction with the prehypoconulid crista (Character 105, 0 to 1). The last of these characters is only found in these two taxa and strongly supports their monophyly. Cymbalophus can be distinguished from Systemodon only on size and geography. |