Pseudopotamis
Pseudopotamis is a genus of freshwater snails which have an operculum, aquatic gastropod mollusks in the family Pachychilidae. Distribution. It occurs on the Torres Strait Islands. A sister group (the closest relative) of "Pseudopotamis" is genus "Tylomelania". "Pseudopotamis" and "Tylomelania" split in the Middle Miocene c. 19.5 Mya. Species. Species within the genus "Pseudopotamis" include: Description. Pallial oviduct evolved into an uterine brood (that release shelled juvenile snails). Ecology. Species in the genus "Pseudopotamis" are ovoviviparous.