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Desmatochoerus megalodon
Taxonomy
Mesoreodon megalodon was named by Peterson (1907). Its type specimen is CM 1325, a partial skull (front of the skull and lower jaws of a young individual, but with all the permanent teeth in position), and it is a 3D body fossil. Its type locality is Lower Monroe Creek, which is in an Arikareean terrestrial horizon in Nebraska.
It was synonymized subjectively with Eporeodon latidens by Lander (1998); it was recombined as Desmatochoerus megalodon by Stevens and Stevens (1996), Stevens and Stevens (2007) and Stevens et al. (2023).
It was synonymized subjectively with Eporeodon latidens by Lander (1998); it was recombined as Desmatochoerus megalodon by Stevens and Stevens (1996), Stevens and Stevens (2007) and Stevens et al. (2023).
Subspecies
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1906 | Mesoreodon megalodon Peterson |
| 1907 | Mesoreodon megalodon Peterson p. 24 |
| 1937 | Mesoreodon megalodon Thorpe p. 102 figs. Figs. 4, 66-67} PI. X, figs. 3-5; PI. XLIV, fig. 1 |
| 1940 | Mesoreodon wheeleri Koerner |
| 1949 | Mesoreodon megalodon Schultz and Falkenbach p. 145 figs. 7, 16, 17, 19, 20, 25, 26 |
| 1949 | Mesoreodon megalodon sweeti Schultz and Falkenbach p. 147 figs. Figures 16-18, 20, 25, 26. |
| 1949 | Merycoides giganteus Schultz and Falkenbach p. 158 figs. 21-24 |
| 1996 | Desmatochoerus megalodon Stevens and Stevens |
| 2007 | Desmatochoerus megalodon Stevens and Stevens p. 160 |
| 2023 | Desmatochoerus megalodon Stevens et al. p. 55 figs. Figures 40, 41, 42A |
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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.
†Desmatochoerus megalodon Peterson 1907
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Invalid names: Merycoides giganteus Schultz and Falkenbach 1949 [synonym], Mesoreodon wheeleri Koerner 1940 [synonym]
†Mesoreodon megalodon sweeti Schultz and Falkenbach 1949
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| C. B. Schultz and C. H. Falkenbach 1949 (Merycoides giganteus) | SKULL: Medium size, considerably than in M. nebraskensis or M. cursor; infraorbital foramen above anterior P4.
MANDIBLE: Larger than that of M. nebraskensis and M. cursor. DENTITION: Longer and heavier than that of M. nebraskensis and M. cursor. LIMBS:Unknown. | |
| C. B. Schultz and C. H. Falkenbach 1949 | SKULL: Larger, more massive, and broader than examples of M. cheeki; approximately equal in length to that of M. chelonyx wheeleri but broader; sagittal crest higher than in M. cheeki; frontals wide; malar deep below the orbit; zygomatic arch more massive and extending upward and posteriorly farther than in examples of M. cheeki,·lacrimal fossa larger than in examples of M. cheeki; infra- orbital foramen located above the posterior portion of pa and extending to the anterior portion of P 4 ; paroccipital process wide at base, and wider and tapering more rapidly than in examples of M. cheeki; bulla well nflated, comparatively large and suboval in outline, larger than in examples of M. cheeki; postglenoid process more robust and wider transversely than in examples of M. cheeki.
MANDIBLE: More massive than examples of M. cheeki. DENTITION: Dental series longer and heavier than in examples of M. cheeki. LIMBS: Longer and heavier than in M. cheeki | |
| M. S. Stevens et al. 2023 | Smaller (M1-3 length = 55-70 mm) species of Desmatochoerus, with relatively primitive and low-crowned cheek teeth. |