driving transitions between oviparity and viviparity is based on studies on vertebrates. The
species rich door snail (Clausiliidae) subfamily Phaedusinae represents a suitable and
unique model for further examining parity evolution, as three different strategies, oviparity,
viviparity, and the intermediate mode of embryo-retention, occur in this group. The present
study reconstructs the evolution of reproductive strategies in Phaedusinae based on time …