Vivipara References Vivipara gastropod genus Ask Anything Homework Help Written by The Information Architects of Encyclopaedia Britannica The Information Architects maintain a master list of the topics included in the corpus of Encyclopædia Britannica, and create and manage the relationships between them. The Information Architects of Encyclopaedia Britannica Britannica AI Ask Anything Learn about this topic in these articles: gastropod/ Reproduction and life cycles…some species of the freshwater Vivipara living 20 years in captivity. Some Sonoran Desert snails from California have been revived after eight years in estivation. Such desert species may live 20 to 50 years. Read More…some species of the freshwater Vivipara living 20 years in captivity. Some Sonoran Desert snails from California have been revived after eight years in estivation. Such desert species may live 20 to 50 years. Read More