The ABC islands are part of a region.
Pomatiopsidae is a family of small , mainly freshwater snails , -LRB- some also occur in other habitats -RRB- that have gills and an operculum , aquatic gastropod mollusks in the superfamily Truncatelloidea -LRB- according to the taxonomy of the Gastropoda by Bouchet & Rocroi , 2005 -RRB- .. Gastropoda. Gastropoda. Truncatelloidea. Truncatelloidea. family. family ( biology ). other habitats. Pomatiopsidae#Ecology. gills. gills. operculum. operculum ( gastropod ). aquatic. Aquatic animal. gastropod. gastropod. Pomatiopsidae are well known as intermediate hosts of Asian schistosomes .