|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Mammalia - Artiodactyla - Merycoidodontidae
It was recombined as Eporeodon major by Marsh (1875), Thorpe (1921), Thorpe (1924), Thorpe (1937), Scott (1940) and Galbreath (1953); it was recombined as Eucrotaphus major by Cope (1884); it was recombined as Eucrotaphus (Oreodon) major by Scott and Osborn (1887); it was recombined as Paramerycoidodon major by Schultz and Falkenbach (1968); it was recombined as Mesoreodon major by Fremd (1994) and Lander (1998); it was recombined as Merycoidodon major by Stevens and Stevens (1996) and Stevens and Stevens (2007).
|Year||Name and author|
|1853||Oreodon major Leidy|
|1856||Oreodon major Leidy p. 164|
|1857||Oreodon major Leidy p. 89|
|1869||Oreodon hybridus Leidy|
|1875||Eporeodon major Marsh p. 250|
|1884||Eucrotaphus major Cope p. 517|
|1887||Eucrotaphus (Oreodon) major Scott and Osborn p. 155|
|1921||Eporeodon major Thorpe|
|1924||Eporeodon hybridus Thorpe|
|1924||Eporeodon major Thorpe|
|1937||Eporeodon major Thorpe|
|1940||Eporeodon major Scott p. 679|
|1949||Promesoreodon scanloni Schultz and Falkenbach p. 152 figs. 21-25|
|1953||Eporeodon major Galbreath|
|1954||Pseudodesmatochoerus milleri Schultz and Falkenbach p. 209 figs. 12-15, 18|
|1954||Subdesmatochoerus shannonensis Schultz and Falkenbach p. 223 figs. 19 - 21|
|1968||Genetochoerus chamberlaini Schultz and Falkenbach|
|1968||Merycoidodon lambi Schultz and Falkenbach|
|1968||Merycoidodon lynchi Schultz and Falkenbach|
|1968||Otionohyus alexi Schultz and Falkenbach|
|1968||Otionohyus hybridus Schultz and Falkenbach|
|1968||Paramerycoidodon major Schultz and Falkenbach|
|1968||Paramerycoidodon wanlessi Schultz and Falkenbach|
|1994||Mesoreodon major Fremd|
|1996||Merycoidodon major Stevens and Stevens|
|1998||Mesoreodon major Lander|
|2007||Merycoidodon major Stevens and Stevens p. 160|
Is something missing? Join the Paleobiology Database and enter the data
|C. B. Schultz and C. H. Falkenbach 1949 (Promesoreodon scanloni)||SKULL: Small; see generic characters.
MANDIBLE: Light; see generic characters.
DENTITION:Brachyodont; series of less length than that in known species of Mesoreo- don; pa with anterior internal pits and P' with external anterior pit (not observable in well-worn specimens).
LIMBS: Short and light, equal to small examples of Merycoidodon culbertsonii.
|C. B. Schultz and C. H. Falkenbach 1954 (Pseudodesmatochoerus milleri)||SKULL: Medium size; tendency to be slightly smaller than examples of P. koffmani, larger than in P. longiceps; supraoccipital wings with less spread than in P. longiceps; sagittal crest with slightly depressed medial region, not so pronounced as in examples of P. koffmani; nasals long and light, with slight anterior retraction, less retraction than in latter species; anterior nasal-maxilla contact above P1, slightly more anterior than in examples of P. koffmani; infraorbital foramen above PLP 4; bulla of moderate size, smaller than other examples of genus; post-glenoid process more peg-shaped than in examples of P. kojfmani (closer to that of P. longiceps in this respect, but with less height).
MANDIBLE: Postsymphysis below anterior portion of Pa; posterior border of ascending ramus lighter than in P. longiceps. ·
DENTITION: Series approximately same size as examples of P. koffmani, larger than in P. longiceps, slightly longer than in P. wascoensis; more robust than in latter two species.
|C. B. Schultz and C. H. Falkenbach 1954 (Subdesmatochoerus shannonensis)||SKULL: Slightly larger than in S. socialis, smaller than that of holotype of S. montanus; exoccipital vacuities moderately large, smaller than those in S. montanus; zygomatic arch with less abrupt posterior rise and inward notch below posterior aspect of orbit more pronounced than in S. socialis; paroccipital process heavier at base than in that species; bulla similar to that in S. socialis except for less prominent external posterior groove and pit for hyoid attachment.
MANDIBLE: Slightly smaller than in holotype of S. montanus; larger than other forms of the genus.
DENTITION: Series with average length greater than that in S. socialis; anterior intermediate crests on PLP 3 each well de- veloped (a remnant of an analogous crest indicated in unworn C/).
LIMBS: Slightly larger and more robust than in S. socialis. (Known from fragmentary specimens only.)