Big, bad Dinohyus (= Daedon) enters the LRT

No surprises here.
Daeodon shoshonensis (Cope 1878), the last and largest of the entelodonts, nests with Archaeotherium in the large reptile tree (LRT, 1383 taxa). A huge skull and slender limbs tipped by two fingers and two twos characterize this genus. A bison-like hump of dorsal spines helped support the mighty skull.

Figure 1. Skull of Dinohyus + Daedon with bones colored using DGS. Note the reappearance of the postorbital ring composed of postfrontal and postorbital. The jugal extends to the jaw joint, something that usually only happens in marsupials. The jaw joint is at the back of the skull, convergent with some multituberculates, crowding out the ear bones. Not much of ascent on that coronoid process of the dentary. And is that a splenial poking out as a mandible horn?

Figure 1. Skull of Dinohyus + Daedon with bones colored using DGS. Note the reappearance of the postorbital ring composed of postfrontal and postorbital. The jugal extends to the jaw joint, something that usually only happens in marsupials. The jaw joint is at the back of the skull, convergent with some multituberculates, crowding out the ear bones. Not much of ascent on that coronoid process of the dentary. And is that a splenial poking out as a mandible horn?

Repeating the caption here:
Note the reappearance of the postorbital ring composed of postfrontal and postorbital. The jugal extends to the jaw joint, something that usually only happens in marsupials. The jaw joint is at the back of the skull, convergent with some multituberculates, crowding out the ear bones. Not much of ascent on that coronoid process of the dentary. And is that a splenial poking out as a mandible horn?

Entelodonts arise from
a sister to Ancodus in the LRT. And this clade is a sister to the camel + deer + giraffe clade. All arise from sisters to Danjiangia and Lambdotherium in the LRT. And all these are sisters to Sus, the pig, a basal artiodactyl.

References
Cope ED 1878. On some characters of the Miocene fauna of Oregon. Paleontological Bulletin. 30: 1–16.
Peterson O A 1905b. A correction of the generic name (Dinochoerus) given to certain fossil remains from the Loup Fork Miocene of Nebraska. Science. 22: 719.
Peterson OA 1909. A revision of the Entelodontida”. Memoirs of the Carnegie Museum. 4 (3): 41–158.

wiki/Anthracotherium
wiki/Archaeotherium
wiki/Daeodon

 

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