|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Mammalia - Artiodactyla - Merycoidodontidae
It was synonymized subjectively with Merycoides longiceps by Lander (1998); it was recombined as Merycoides stouti by Stevens and Stevens (2007).
|C. B. Schultz and C. H. Falkenbach 1950||SKULL: Largest known form of the genus; frontals rounded laterally; nasal retracted anteriorly to a point above anterior portion ofP1; anterior nasal-maxillacontact inregion above P2;typical round supraorbital foramen present (not an oblong vacuity as in P. typus or elongated slot-like depression as in P. kayi), with prominent groove extending forward and downward on side of face to ap- proximately the anterior border of large lacrimal fossa; zygomatic arch moderately heavy, with gradual rise posteriorly, extending to and above posterior border of post-glenoid process (similar to arch of P. kayi, not U-shaped in outline as in P. typus); malar deeper than in other species of genus; infraorbital foramen above P4 , enlarged; bulla similar to that of P. kayi, with inferior surface more depressed towards basioccipital than in P. typus; postglenoid process robust, wide transversely.
MANDIBLE: Largest of genus; similar in shape to that of P. kayi; ramus shallower than examples of P. typus; inferior border with more downward curve below M3 than in other species of genus.
DENTITION: Superior and inferior series longer and more robust than in other species of Phenacocoelus; C/ and P1moderately large and heavy; premolars not crowded, tendency to slight diastema between P1 and P2 ; p1 usually set at slight angle to alveolar border; Pr-P3 each set at slight angle to alveolar border; weak posterior intermediate crest developed on P2.
LIMBS:Approximately same length as examples of P. kayi; considerably longer than those of P. typus; more robust than in either of these two species.