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Paroreodon
Taxonomy
Paroreodon was named by Thorpe (1921). Its type is Eporeodon trigonocephalus parvus.
It was reranked as Oreodontoides (Paroreodon) by Schultz and Falkenbach (1947).
It was assigned to Oreodontoides by Schultz and Falkenbach (1947); to Merycoidodontidae by Thorpe (1921), Thorpe (1937) and Lander (1998); and to Ticholeptinae by Stevens and Stevens (2007) and Stevens et al. (2023).
It was reranked as Oreodontoides (Paroreodon) by Schultz and Falkenbach (1947).
It was assigned to Oreodontoides by Schultz and Falkenbach (1947); to Merycoidodontidae by Thorpe (1921), Thorpe (1937) and Lander (1998); and to Ticholeptinae by Stevens and Stevens (2007) and Stevens et al. (2023).
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1921 | Paroreodon Thorpe |
| 1937 | Paroreodon Thorpe p. 177 |
| 1947 | Oreodontoides (Paroreodon) Schultz and Falkenbach p. 255 figs. 1, 11, 12, 14-16 |
| 1968 | Epigenetochoerus Schultz and Falkenbach |
| 1998 | Paroreodon Lander |
| 2007 | Paroreodon Stevens and Stevens p. 163 |
| 2023 | Paroreodon Stevens et al. p. 94 |
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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.
G. †Paroreodon Thorpe 1921
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†Paroreodon parvus Thorpe 1921
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Invalid names: Oreodontoides (Paroreodon) stocki Schultz and Falkenbach 1947 [synonym], Oreodontoides stocki Schultz and Falkenbach 1947 [synonym], Paroreodon marshi Thorpe 1921 [synonym]
Invalid names: Epigenetochoerus Schultz and Falkenbach 1968 [synonym]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| C. B. Schultz and C. H. Falkenbach 1947 | SKULL:Small size, equal to that of a large species of Merychyus; mesocephalic; superior surface well arched, more so than in 0reo- dontoides; occipital region somewhat fan- shaped (less than in typical Merychyus) but oblong (vertically); supraoccipital wings widely spread; incipient exoccipital pits; sagittal crest low and short; brain case inflated, with moderate postorbital restriction; lacrimal fossa large but shallow, slightly deeper than in average examples of M erychyus minimus; infraorbital foramen above region of posterior portion of P3 and anterior por- tion of P 4 ; small triangular prelacrimal vacuity, placed more posteriorly than in Merychyus; zygomatic arch moderately heavy, with an abrupt rise posterior of malar; bulla well inflated, tapering to an anteroposterior ridge; paraoccipital process wide at base, tapering rapidly for lower one-half and ad- hering to the bulla; postglenoid process moderately heavy, anteroposteriorly compressed.
MANDIBLE:Inferior border increasing in depth anteroposteriorly, with moderate abrupt downward curve posterior of M 3 ; ascending ramus wide anteroposteriorly and high; condyle set at slight angle to ramus. DENTITION:Light but heavier than in 0reodontoides; comparatively brachyodont in comparison with examples of Merychyus; superior premolars set in straight line with alveolar border; C/ heavy; anterior portion of P3 shortened; external styles of M2 and M3 prominent; Pi-Pa set straight with exterior alveolar border; inferior premolars not crowded and superior PLP 3 not at angular position as in 0reodontoides; Ma with exceptionally prominent heel. LIMBS:Light construction, similar to those of Merychyus. (Known only from a referred specimen.) | |
| M. S. Stevens et al. 2023 | Equal to Merychyus elegans in size, but occipital region less fan-shaped than in Merychyus. Relatively long premolar row, with wider and shorter molars. Nasal notch more deeply retracted than in Eporeodon, and with robust glenoids typical of ticholeptines |