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Memórias do Instituto Oswaldo Cruz

Print version ISSN 0074-0276

Mem. Inst. Oswaldo Cruz vol.88 no.1 Rio de Janeiro Jan./Mar. 1993

http://dx.doi.org/10.1590/S0074-02761993000100011 

On Pomacea canaliculata (Lamarck, 1822) (Mollusca; Pilidae: Ampullariidae)ThiengoSilvana C.BordaCarlos E.AraújoJ. L. Barros Instituto Oswaldo Cruz, Departamento de Malacologia Rio de Janeiro Brasil Universidad Nacional del Nordeste, Centro Nacional de Parasitología Santa Fe Argentina Universidade Federal Rural do Rio de Janeiro, Departamento de Parasitologia Animal, Instituto de Biologia Seropédica Brasil 0319938816771This paper deals with the morphology of Pomacea caniculata (Lamarck, 1822) collected at Corrientes, Argentina. Comparison is made with Pomacea lineata (Spix, 1827) and Pomacea sordida (Swainson, 1823). The shell is globose, heavy, with greenish or horn-colored periostracum and dark spiral bands; apex subelevated, 5-6 whorls increasing rather rapidly and separated by very deep suture. Aperture large, rounded to subelongated; lip sometimes reddish; umbilicus large and deep; operculum corneous, entirely closing the aperture. Ratios: shell width/shell length = 0.78-0.96 (mean 0.86); aperture length/shell length = 0.68-0.77 (mean 0.72). Radula similar to other congeneric species. Testis and spermiduct as in P. lineata and P. sordida; prostate cylindric and short, cream in color as the testis. Penial sheath straight bearing a central outer gland deeply embedded in the tissue of its basal portion and a large wrinkled gland occupying 2/3 of the distal tip of its inner surface; the rigth margin of the sheath overlaps the left one until 2/3 of its proximal end. Female reproductive apparatus similar to that P. lineata; vestigial male copulatory apparatus (penis and its sheath) present in all females examined.MolluscaPilidae(=Ampullariidae)Pomacea canaliculataPomacea lineataPomacea sordidamorphologyFull text available only in PDF format.Texto completo disponível apenas em PDF.