On the reproduction of brazilian fishes . Xi. Scanning microscopic study of oogenesis in the armored catfish hypostomus ancistroides ihering 1911 (pisces loricariidae) - Watanabe, Ii-Sei; Lopes, R A; Leme dos Santos, H S; Nuti Sobrinho, A; Paula-Lopes, O V (Ars Veterinaria, 1987)