 Species are traditionally classified into five taxonomic groups, the Pythiidae, the Laemodontidae, the Melampodidae, the Ellobiidae and the Carychiidae.These taxa have been recognized either as families within Ellobioidea or as sub-families within the family Ellobiidae.The family Ellobiidae consists of the following subfamilies (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005)