PRINTED IN ARGENTINA Workshop: “Biology of Ampullariidae”

The apple snail Pomacea canaliculata (Lamarck, 1822) is an amphibious oviparous dioecious freshwater gastropod displaying internal fertilization. During the breeding season, just after copulation, the females lay pink-reddish calcareous-shelled egg clusters above wa-ter level, on the emerging parts of plants, rocks and other elements (Albretch et al., 1996; Andrews, 1964; Estebenet and Cazzaniga, 1993; Hylton Scott, 1957). In Pomacea canaliculata the female reproductive system exhibits an organization similar to that of othe