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Ticholeptus calimontanus
Taxonomy
Merychyus calimontanus was named by Dougherty (1940). Its type specimen is CIT 2543, a partial skeleton (Partial skull with I1-M3, right calcaneum, left astragalus, metatarsal, and proximal phalanx), and it is a 3D body fossil. Its type locality is Padrones Spring, which is in a Miocene terrestrial horizon in California.
It was synonymized subjectively with Merychyus elegans by Kelly and Lander (1988); it was synonymized subjectively with Merychyus smithi by Lander (1998); it was recombined as Ticholeptus calimontanus by Schultz and Falkenbach (1941), Repenning and Vedder (1961), Munthe (1979), Stevens and Stevens (2007) and Stevens et al. (2023).
It was synonymized subjectively with Merychyus elegans by Kelly and Lander (1988); it was synonymized subjectively with Merychyus smithi by Lander (1998); it was recombined as Ticholeptus calimontanus by Schultz and Falkenbach (1941), Repenning and Vedder (1961), Munthe (1979), Stevens and Stevens (2007) and Stevens et al. (2023).
Synonyms
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Synonymy list
Year | Name and author |
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1940 | Merychyus calimontanus Dougherty |
1941 | Ticholeptus calimontanus Schultz and Falkenbach p. 75 |
1941 | Ticholeptus tooheyi Schultz and Falkenbach p. 84 |
1961 | Ticholeptus calimontanus Repenning and Vedder |
1979 | Ticholeptus calimontanus Munthe |
2007 | Ticholeptus calimontanus Stevens and Stevens p. 164 |
2023 | Ticholeptus calimontanus Stevens et al. p. 93 figs. Figures 75-76; Appendix 9B; Table A31 |
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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.
†Ticholeptus calimontanus Dougherty 1940
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Invalid names: Ticholeptus tooheyi Schultz and Falkenbach 1941 [synonym]
Diagnosis
Reference | Diagnosis | |
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C. B. Schultz and C. H. Falkenbach 1941 | SKULL.-Known only from palate and fragmentary maxilla; smallest form of the genus.
MANDIBLE.-Known only from fragmentary specimen. DENTITION.-Smallest dental series of the genus. LIMBs.-Known only from foot bones. | |
C. B. Schultz and C. H. Falkenbach 1941 (Ticholeptus tooheyi) | SKULL.-Smaller and lighter construction throughout than examples of T. hypsodus; nasals longer than in T. hypsodus but with approximately the same amount of retraction; premaxillre joined somewhat lower than in T. hypsodus; muzzle narrow; palate narrow.
MANDIBLE.-Smaller and lighter construction than examples of T. hypsodus. DENTITION.-Superior and inferior dental series shorter than in T. hypsodus and premolars more crowded. LIMBs.-Lighter than those of T. hypsodus. | |
M. S. Stevens et al. 2023 | Ticholeptus slightly smaller (M1-3 length = 40- 45 mm; P2-M3 length 75-79 mm; m1-3 length = 45-50 mm; p2-m3 length = 75-82 mm) and more lightly built than typical T. zygomaticus, with slightly longer nasals, narrow rostrum, and fusion of the premaxillae slightly lower than in other Ticholeptus. |