Morphological and ultrastructural aspects of the spermatozoon of Curimata inornata Vari, 1989 (Pisces, Teleostei) is described by light and transmission electron microscopy, the spermatozoon head contains a nucleus ovoid-shaped, with granular chomatin electron dense, a short middle piece and a tail, with the classic 9+2 axoneme.
infrastructure; Spermatozoon; Amazonian Fish; Teleost