Histological aspects of the penial complex and vagina of taxa of the Biomphalaria tenagophila complex (Mollusca: Planorbidae)

Histological studies were carried out with 49 specimens; 18 Biomphalaria tenagophila guaibensis, 19 B. t. and 12 occidentalis, collected in 10 municipalities the states of São Paulo Rio Grande do Sul, Brazil. The study considered histological aspects vagina, vaginal pouch penial complex. In this study, we describe, for first time, features complex tenagophila, guaibensis occidentalis. lining epithelial tissue muscular show a similar pattern except intermediate layer prepuce, which distinguishes from other two taxa. on vagina region species are necessary to confirm taxonomic value these regions, order contribute group’s systematics.