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Merychyus elegans
Taxonomy
Merychyus elegans was named by Leidy (1858) [genotype]. Its type specimen is ANSP 11290, USNM 121, ANSP 11289, a partial skull, and it is a 3D body fossil. Its type locality is Martin Canyon Quarry A, which is in a Hemingfordian channel horizon in the Pawnee Creek Formation of Colorado. It is the type species of Merychyus.
Synonyms
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Synonymy list
Year | Name and author |
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1858 | Merychyus elegans Leidy p. 25 |
1873 | Merychyus elegans Leidy p. 201 |
1884 | Merychyus elegans Cope p. 545 |
1890 | Merychyus elegans Scott and Osborn p. 72 |
1902 | Merychyus elegans Hay p. 669 |
1906 | Merychyus elegans Douglass p. 567 |
1924 | Merychyus paniensis Loomis |
1937 | Merychyus elegans Thorpe p. 226 figs. PI. XXXI, figs. 5-8 |
1937 | Merychyus elegans paniensis Thorpe p. 227 figs. fig. 165, pl. 34, fig. 4. |
1947 | Merychyus elegans Schultz and Falkenbach p. 192 figs. 1, 4, 13, 15-17 |
2007 | Merychyus elegans Stevens and Stevens p. 164 |
2009 | Merychyus elegans Morgan et al. p. 95 |
2023 | Merychyus elegans Stevens et al. p. 43 figs. Figure 31; Appendix 2E; Table A13 |
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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.
†Merychyus elegans Leidy 1858
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Invalid names: Merychyus paniensis Loomis 1924 [synonym]
Diagnosis
Reference | Diagnosis | |
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C. B. Schultz and C. H. Falkenbach 1947 | SKULL: Larger than that of M. minimus, approaching that of M. arenarum in size; bulla semi-depressed, somewhat as in Mery- chyus (Metoreodon). (See generic characters.)
MANDIBLE: Same size comparisons as skull. (See generic characters.) DENTITION: Series larger than those of M. minimus and with a tendency to be larger than in M. arenarum, but with a certain amount of overlapping. LIMBS: Closer to those of M. minimus, smaller and lighter than those of M. arenarum. | |
M. S. Stevens et al. 2023 | Large species of Merychyus (M1-3 length = 42-49 mm), about the same size as M. arenarum, but with broaderand lower-crowned cheek teeth, with a smaller less hypsodont M3/m3, a relatively smaller and more depressed auditory bulla, and a more fan-shaped occipital crest. Disjunctly larger than M. minimus. |