Basic info | Taxonomic history | Classification | Included Taxa |
Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Merychippus sejunctus
Taxonomy
Protohippus sejunctus was named by Cope (1874) [also attributed to Cope 1884]. Its type specimen is AMNH 8291, a partial skeleton (Complete skull and lower jaws with entire dentition and parts of the skeleton associated, including the hind feet), and it is a 3D body fossil.
It was recombined as Merychippus (Protohippus) sejunctus by Stirton (1940); it was recombined as Pliohippus sejunctus by Quinn (1987); it was recombined as Stylonus sejunctus by Kelly and Lander (1988); it was recombined as Merychippus sejunctus by Hay (1902), Osborn (1904), Trouessart (1905), Gidley (1907), Matthew (1909), Cope and Matthew (1915), Osborn (1918), Matthew (1924), Hay (1930), Stirton (1933), Kelly (1995), MacFadden (1998) and Bravo-Cuevas and Ferrusquía-Villafranca (2006).
It was recombined as Merychippus (Protohippus) sejunctus by Stirton (1940); it was recombined as Pliohippus sejunctus by Quinn (1987); it was recombined as Stylonus sejunctus by Kelly and Lander (1988); it was recombined as Merychippus sejunctus by Hay (1902), Osborn (1904), Trouessart (1905), Gidley (1907), Matthew (1909), Cope and Matthew (1915), Osborn (1918), Matthew (1924), Hay (1930), Stirton (1933), Kelly (1995), MacFadden (1998) and Bravo-Cuevas and Ferrusquía-Villafranca (2006).
Synonymy list
Year | Name and author |
---|---|
1874 | Protohippus sejunctus Cope p. 15 |
1893 | Protohippus sejunctus Cope p. 25 |
1902 | Merychippus sejunctus Hay p. 618 |
1904 | Merychippus sejunctus Osborn |
1905 | Merychippus sejunctus Trouessart |
1907 | Merychippus sejunctus Gidley p. 891 |
1909 | Merychippus sejunctus Matthew |
1915 | Merychippus sejunctus Cope and Matthew pp. Plate CL |
1918 | Merychippus sejunctus Osborn p. 110 figs. Plates 11.1, 16.1,2,3, 19.1,2, 20,4&3, 48.1, 50.1,5, 53.3. Text Figs. 85, 85a, 86 |
1924 | Merychippus sejunctus Matthew |
1930 | Merychippus sejunctus Hay |
1933 | Merychippus sejunctus Stirton |
1940 | Merychippus (Protohippus) sejunctus Stirton p. 182 |
1987 | Pliohippus sejunctus Quinn |
1988 | Stylonus sejunctus Kelly and Lander |
1995 | Merychippus sejunctus Kelly p. 26 |
1998 | Merychippus sejunctus MacFadden p. 547 |
2006 | Merychippus sejunctus Bravo-Cuevas and Ferrusquía-Villafranca p. 780 |
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.
†Merychippus sejunctus Cope 1874
show all | hide all
Diagnosis
Reference | Diagnosis | |
---|---|---|
H. F. Osborn 1918 | (Matthew, 1913) (1) Size medium, pLm3 .123 (see Gidley); (2) protocone rather large, flattened oval,
united half way down; (3) fossette borders simple, fossette areas contracted; (4) pli caballin rudimentary or absent; (5) metastylid not separate in P2; (6) metastylid and metaconid pillars forming a rather narrow, double column; (7) heel of m3 broad, with internal fold. (8) Lachrymo-malar fossre broad, sessile, sub-united; (9) preorbital region rather short. (10) Ulnar shaft slender, united with radius except near proximal extremity; (11) metapodials and limb bones of moderate length and slenderness; (12) unguals rather narrow. |
Measurements
No measurements are available
|
|
||||
|
|
||||
|
|
||||
|
|||||
|
|
||||
Source: subf = subfamily, subc = subclass, c = class, subp = subphylum | |||||
References: Lillegraven 1979, Ji et al. 2002, MacFadden 1998, Carroll 1988, Nowak 1991, Hendy et al. 2009 |
Age range: Barstovian or 16.30000 to 12.50000 Ma
Collections (6 total)
Time interval | Ma | Country or state | Original ID and collection number |
---|---|---|---|
Miocene | USA (Montana) | Merychippus sejunctus (19038) | |
Hemingfordian | USA (Colorado) | Merychippus sejunctus (17908) | |
Barstovian | USA (Colorado) | Merychippus sejunctus (18203) | |
Early/Lower Barstovian | Mexico (Oaxaca) | Merychippus sejunctus (18735) | |
Early/Lower Barstovian | USA (Texas) | Merychippus sejunctus (18665) | |
Middle Miocene | USA (Colorado) | Merychippus sejunctus (18977) |