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Eporeodon (Oreodontoides)
Taxonomy
Eporeodon (Oreodontoides) was named by Thorpe (1921) [named as subgenus of Eporeodon by Thorpe 1921d; raised to genus level]. Its type is Eporeodon oregonensis.
It was synonymized subjectively with Merychyus by Loomis (1924); it was reranked as Oreodontoides by Thorpe (1923), Thorpe (1924), Thorpe (1937), Schultz and Falkenbach (1947), Lander (1998), Stevens and Stevens (2007) and Stevens et al. (2023).
It was assigned to Eporeodon by Thorpe (1921); to Merycoidodontidae by Thorpe (1923), Thorpe (1924), Thorpe (1937) and Lander (1998); and to Merychyinae by Schultz and Falkenbach (1947), Stevens and Stevens (2007) and Stevens et al. (2023).
It was synonymized subjectively with Merychyus by Loomis (1924); it was reranked as Oreodontoides by Thorpe (1923), Thorpe (1924), Thorpe (1937), Schultz and Falkenbach (1947), Lander (1998), Stevens and Stevens (2007) and Stevens et al. (2023).
It was assigned to Eporeodon by Thorpe (1921); to Merycoidodontidae by Thorpe (1923), Thorpe (1924), Thorpe (1937) and Lander (1998); and to Merychyinae by Schultz and Falkenbach (1947), Stevens and Stevens (2007) and Stevens et al. (2023).
Synonymy list
| Year | Name and author |
|---|---|
| 1921 | Eporeodon (Oreodontoides) Thorpe p. 107 figs. 11 - 13 |
| 1923 | Oreodontoides Thorpe |
| 1924 | Oreodontoides Thorpe p. 316 |
| 1937 | Oreodontoides Thorpe p. 213 |
| 1947 | Oreodontoides Schultz and Falkenbach p. 250 figs. 1, 10, 11, 15-17 |
| 1998 | Oreodontoides Lander |
| 2007 | Oreodontoides Stevens and Stevens p. 164 |
| 2023 | Oreodontoides Stevens et al. p. 31 |
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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.
Subg. †Eporeodon (Oreodontoides) Thorpe 1921
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†Eporeodon (Oreodontoides) oregonensis Thorpe 1921
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| C. B. Schultz and C. H. Falkenbach 1947 | SKULL: Small, ranging in basal length from 158 mm. to 160 mm.; flat, superior contour slightly arched [not to the degree found in 0. (Paroreodon)]; postoccipital region some- what fan-shaped, similar to Paramerychyus; frontals moderately wide; lacrimal fossa rather small but deep; postglenoid process high and more or less peg-shaped. (Paroccipital process, bulla, and condyle not preserved on available material.)
MANDIBLES:hallow; inferior border straight to a point posterior of Ms (posterior portion of ascending ramus incomplete in type), with abrupt downward curve posterior of Ma; postsymphysis below Ma. DENTITION:Brachyodont and light in comparison with Merychyus. LIMBS:Moderately short and light. | |
| M. S. Stevens et al. 2023 | Small merychyine oreodonts (skull length=158-160 mm), with a flatter dorsal profile that is not nearlyas arched as in Merychyus. Postorbital region moderately fan-shaped, but not nearly as much as in Merychyus. Moderatelywide frontals. Small, deep lacrimal fossa. High peg-shapedpostglenoid process. |