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Taxonomy
Stirtonia was named by Hershkovitz (1970).
It was assigned to Cebidae by Hershkovitz (1970), Setoguchi et al. (1981) and Kay et al. (1987); and to Atelidae by McKenna and Bell (1997).
It was assigned to Cebidae by Hershkovitz (1970), Setoguchi et al. (1981) and Kay et al. (1987); and to Atelidae by McKenna and Bell (1997).
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1970 | Stirtonia Hershkovitz p. 6 |
| 1981 | Stirtonia Setoguchi et al. p. 52 figs. 2-5 |
| 1985 | Kondous Setoguchi |
| 1987 | Stirtonia Kay et al. |
| 1997 | Stirtonia McKenna and Bell |
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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. †Stirtonia Hershkovitz 1970
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†Stirtonia tatacoensis Hershkovitz 1970
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Invalid names: Homunculus tatacoensis Stirton 1951 [synonym], Kondous laventicus Setoguchi 1985 [synonym]
†Stirtonia victoriae Kay et al. 1987
Invalid names: Kondous Setoguchi 1985 [synonym]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| P. Hershkovitz 1970 | Largest of known fossil platyrrhine primates, size approximately equal to that of large male Cebus, or small female Alouatta; mandible essentially V-shaped, the horizontal rami comparatively widespread; lateral aspect of right horizontal ramus inferentially little expanded distally, superior margin nearly straight, antero-posterior plane of post-canine dental crowns nearly horizontal, with little elevation and upward curvature of back teeth; symphysis menti slightly longer than deep, upper anterior border (canine-incisor alveolar area) narrowly truncate, not angular or markedly convex, symphyseal angle moderately steep (50°); diastric fossae or depressions completely exposed to view on ventral surface, hidden from dorsal view; incisors small, crowded, the alveoli laterally compressed, and aligned in slightly arced or nearly transverse row, canines well developed, each implanted on anterolateral corner of jaw; premolars with main lingual and bucal cusps closely approximated, paraconid present, trigonid poorly developed; molars elingate, talonid of m1-2 wider and considerably longer than trigonid, paraconid absent, m3 evidently smaller than m1 (and pm4?) and unerupted un adult jaw with permanent canine fully developed. |