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Taxonomy
Arctomyoides was named by Bryant (1945).
It was assigned to Sciuridae by Bryant (1945) and McKenna and Bell (1997).
It was assigned to Sciuridae by Bryant (1945) and McKenna and Bell (1997).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1945 | Arctomyoides Bryant p. 361 |
| 1997 | Arctomyoides 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. †Arctomyoides Bryant 1945
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†Arctomyoides arctomyoides Douglass 1903
†Arctomyoides oregonensis Downs 1956
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| M. D. Bryant 1945 | Mandibular ramus in front of p4 small in comparison with greatly enlarged posterior portion; diastemal region relatively shallower, longer, and broader than in Sciurus, proportions similar to those of Marmota; masseteric fossa large, located dorsally so that its anterior end almost touches alveolar border below m1; coronoid and condyloid processes well developed as in Recent terrestrial sciurids; anterior end of coronoid process merges with alveolar border below m2. Upper incisor stout, finely crenulated, with a distinct median longitudinal groove; P3 small; parastyle on P4 large; mesostyles, mesostylids, and distinct mesoconids and entoconids present on cheek teeth. |
Measurements
No measurements are available
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| Source: f = family, subc = subclass, c = class, subp = subphylum | |||||
| References: Nowak 1991, Ji et al. 2002, Lillegraven 1979, Hendy et al. 2009, Carroll 1988 | |||||