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Morphological diversity of the humerus of the South American subterranean rodent Ctenomys (Rodentia, Ctenomvidae)

Morgan, C., C.; Verzi, D., H.

Journal of Mammalogy 87(6): 1252-1260

2006

ISSN/ISBN: 0022-2372
Accession: 012873947
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Humeral variation associated with digging ability in the subterranean rodent Ctenomys was analyzed through 6 functionally significant indexes. The humerus of some extinct and living species was slightly more specialized than that of fossorial octodontoids dagger Actenomys and Octodon, whereas it was highly specialized in some living species. The constant occurrence of greater epicondyles suggests a hierarchical pattern in the acquisition of scratch-digging specializations. A possible relationship between humeral morphological diversity and environments is preliminarily discussed.

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