2014-10-312014-10-311997-12MATOS, Edilson et al. Ultraestrutura do espermatozóide de Protothaca pectorina (Lamarck) (Mollusca, Bivalvia) do litoral norte do Brasil. Revista Brasileira de Zoologia, Curitiba, v. 14, n. 4, p. 779-783, dez. 1997. Disponível em: <http://www.scielo.br/pdf/rbzool/v14n4/v14n4a02.pdf>. Acesso em: 09 jul. 2014. <http://dx.doi.org/10.1590/S0101-81751997000400002>.0101-8175https://repositorio.ufpa.br/handle/2011/5962The ultrastructure of spermatozoa of the Protothaca pectorina (Lamarck, 1818) is described. The most significam differences were found in the structure and arreangement of the acrosomes, with contains two types of material, one fibrilar, the other electrondense granular. It is concluded that sperm ultrastructure is of the primitive type.porAcesso AbertoRio Cuiarana - PASalinópolis - PAPará - EstadoAmazônia brasileiraMoluscoEspermatozóideProtothaca pectorinaBivalve (Molusco)EspermatogêneseUltraestruturaUltraestrutura do espermatozóide de Protothaca pectorina (Lamarck) (Mollusca, Bivalvia) do litoral norte do BrasilUltrastructure of the spermatozoon of Protothaca pectorina Lamarck (Mollusca, Bivalvia) of the north litoral of the BrazilArtigo de Periódico