| Basic info | Taxonomic history | Classification | Included Taxa |
| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Merycochoerus proprius
Taxonomy
Merycochoerus proprius was named by Leidy (1858) [genotype]. Its type specimen is ANSP 10868, ANSP 10867, NM 156, a mandible, and it is a 3D body fossil. Its type locality is Niobrara River (coll. Hayden 1857), which is in a Barstovian/Clarendonian terrestrial horizon in the Loup Fork Formation of Nebraska. It is the type species of Merycochoerus.
Synonymy list
| Year | Name and author |
|---|---|
| 1858 | Merycochoerus proprius Leidy p. 24 |
| 1873 | Merycochoerus proprius Leidy p. 201 |
| 1884 | Merycochoerus proprius Cope p. 535 |
| 1902 | Merycochoerus proprius Hay p. 668 |
| 1906 | Merycochoerus proprius Douglass p. 567 |
| 1937 | Merycochoerus proprius Thorpe p. 157 figs. PI. XXII; PI. XXIII, figs. 1-3 |
| 1940 | Merycochoerus proprius Schultz and Falkenbach p. 280 |
| 2007 | Merycochoerus proprius Stevens and Stevens p. 160 |
| 2023 | Merycochoerus proprius Stevens et al. p. 76 figs. Figures 53, 57-60; Appendix 7A; Table A26 |
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.
†Merycochoerus proprius Leidy 1858
show all | hide all
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| C. B. Schultz and C. H. Falkenbach 1940 | SKULL.-Average larger and more massive than M. proprius magnus or M. matthewi; very high muzzle and maxillre; maxillary notch of sigmoid curve, below nasals, retracted to a point above MLM 2 ; nasals retracted more than in M. proprius magnus or M. matthewi; tendency for nasals to protrude upward anteriorly; brain case with a pronounced ridge.
MANDIBLE.-More robust than examples of M. matthewi. DENTITIONs.-Slightly heavier than those of M. matthewi, but overlapping in size range with that species. LIMBs.-Definitely heavier than examples of M. matthewi; feet shorter and more robust than those of M. matthewi. | |
| M. S. Stevens et al. 2023 | Largest species of Merycochoerus (M1-3 length = 90-100 mm; P2-M3 length = 130-150 mm; m1-3 length = 95-105 mm; p2-m3 length =135-150 mm); nasals retracted above M1-2, and the nasal bone reduced to a short blunt curve, and pointed upward and anteriorly; pronounced sagittal crest. Dorsal border of premaxillary and maxillary notch has a curved, sigmoidal shape; high, massive rostrum and maxillary |
Measurements
No measurements are available
|
|
||||
|
|
||||
|
|
||||
|
|
||||
| Source: f = family, o = order, subc = subclass, c = class, subp = subphylum | |||||
| References: Lander 1998, Lillegraven 1979, Carroll 1988, Nowak 1999, Hendy et al. 2009 | |||||
Age range: base of the Barstovian to the top of the Hemingfordian or 16.30000 to 15.97000 Ma
Collections (9 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Early/Lower Hemingfordian | USA (Nebraska) | Merycochoerus proprius (17898 17934 17940 17946 17947 17978) | |
| Hemingfordian | USA (Colorado) | Merycochoerus proprius (17965) | |
| Hemingfordian | Canada (Saskatchewan) | Merycochoerus proprius (17870) | |
| Barstovian - Clarendonian | USA (Nebraska) | Merycochoerus proprius (type locality: 190543) |