Aplexa rivalis
Introduction '''''Aplexa rivalis''''' is a species of small air-breathing freshwater snail, an aquatic pulmonate gastropod mollusk in the family Physidae, a family which are sometimes known as the bladder snails.
Description ''Rivalis Aplexa'' has a thin shell levorotatory, featuring a large oval opening with parietal callus lip sharp and wide. The tentacles are filiform and foot is very long in the back. Ovigerous masses are constituted by transparent oval eggs variable number embedded in a gelatinous mass.
Distribution This species occurs in:* Brazil* Venezuela
Ecology ''Chaetogaster limnaei'' and ''Nais communis'' were found to be associated with ''Aplexa rivalis'' in Brazil. In Venezuela it is found inhabiting ornamental ponds in the leaves of plants and vegetable crops, and are common in aquarium shops.
See also * List of non-marine molluscs of El Hatillo Municipality, Miranda, Venezuela
References
External links *  ZipcodeZoo.com: ''Aplexa rivalis'' *  Biodiversity Heritage Library: ''Aplexa rivalis''