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|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Mammalia - Artiodactyla - Merycoidodontidae
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.
|C. B. Schultz and C. H. Falkenbach 1954||SKULL: Medium size; basal length ranging from 233 to 257 mm., width from 125 to 176 mm.; dolichocephalic to mesocephalic; supra- occipital wings small, not widely spread, produced posteriorly beyond the occipital condyles, similar to examples of Desmatochoerus and D. (Paradesmatochoerus); small exoccipital vacuities in deep pits, above condyles; sagittal crest exceptionally low, depressed in medial region; brain case long and narrow; frontals with slight protuberance at midline (not so pronounced as in average examples of Desmatochoerus); frontals usually with a convex surface; nasals with slight anterior retraction; anterior nasal-maxilla contact above P 1 ; orbit directed mostly outward and forward; malar moderately deep below orbit; posterior border of zygomatic arch light to moderately robust, with inward curve poste- rior to orbit; infraorbital foramen above P 3 ; lacrimal fossa small, but deep; facial vacuity usually absent; depression above PLP 3 very shallow; premaxillae joined for short distance; occipital condyles similar to those of Desmatochoerus; paroccipital process wide at base, laterally compressed, tapering to an oval-shaped inferior border; bulla inflated, from medium to large size, with some lateral compression; postglenoid process usually lighter than in examples of Desmatochoerus; posterior palate projecting posteriorly beyond M3.
MANDIBLE: Medium size; moderately robust; ramus below dentition shallow; postsymphysis below area between P2 and P3; ramus increasing gradually in depth posteriorly, with a more pronounced downward curve of inferior border posterior to Ma; ascending ramus moderately high; condyle light, wide laterally, set at less than right angle to axis of dentition, with external border of condyle farther forward and higher than internal border.
DENTITION: Brachyodont; series approximately same size as examples of D. (Paradesmatochoerus), shorter than those of Desmatochoerus, but nearly as robust; C/ and P1 moderately large; external styles of superior molars weak to moderately prominent; premolars not crowded (set approximately parallel to alveolar border); PLP 3 each with anterior intermediate crest, not so strong as in examples of Desmatochoerus or D. (Paradesmatochoerus); P2 and P3 with weak posterior intermediate crest.
LIMBS: Similar in size and form to examples of D. (Paradesmatochoerus), but with tendency to be longer.