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Geographical of sperm forms in the genus Ctenomys (Rodentia-Octodontidae)

Thales Renato O. Freitas

Departamento de Genética, Universidade Federal do Rio Grande do Sul, Caixa Postal 15053, 91501-970 Porto Alegre, RS, Brasil

ABSTRACT

The argentophilic patterns of sperm in five species of the genus Ctenomys: C. australis, C. sp., C. minutus, C. flamarioni, and C. torquatus are described. Sperm of C. torquatus, C. sp., and C. minutus show symmetric, while these of C. flamarioni and C. australis exhibit simple-asymmetric forms. All the five species reveal different patterns of sperm under silver staining. This report discusses the geographic distribution of the sperm forms of species of the genus as well as evolutionary relationships.

Keywords: sperm forms; Ctenomys.

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