Chapter

Interspecific Scaling and Ontogenetic Growth Patterns of the Skull in Living and Fossil Ctenomyid and Octodontid Rodents (Caviomorpha: Octodontoidea)

Aldo I. Vassallo and Matías S. Mora

in The Quintessential Naturalist

Published by University of California Press

Published in print July 2007 | ISBN: 9780520098596
Published online March 2012 | e-ISBN: 9780520916159 | DOI: http://dx.doi.org/10.1525/california/9780520098596.003.0029
Interspecific Scaling and Ontogenetic Growth Patterns of the Skull in Living and Fossil Ctenomyid and Octodontid Rodents (Caviomorpha: Octodontoidea)

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This chapter assesses the effect of size on skull attributes of ctenomyid and octodontid rodent species using an allometric approach. It focuses on traits that have long been considered of relevance for tooth digging, such as the development of the mandibular angle and masseteric crest, and the robustness of incisors. The chapter reveals important shape differences between Ctenomys, on one hand, and octodontid genera (except Spalacopus and, partly, Aconaemys) plus the early ctenomyid Actenomys, on the other, in interspecific comparisons of adult specimens.

Keywords: skull attributes; ctenomyid; octodontid; allometric approach; Ctenomys; octodontid genera; ctenomyid Actenomys; interspecific comparisons; adult specimens

Chapter.  7840 words.  Illustrated.

Subjects: Zoology and Animal Sciences

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