This genus is in need of revision, as the species concepts we have used have not been rigorously tested. Unpublished molecular data indicate that the species units we are here using appear to be justified, however they are not accompanied by clear-cut morphological characters that allow separation based on shell characters alone. As the species units appear to be overall concordant with state boundaries, we have used these boundaries to delimit species. This situation is not ideal and can only be resolved by additional molecular and morphological studies involving dense sampling.
Similar to I. newcombi, but not umbilicate and lacking spiral striae. Confined to the southern half of Western Australia.
Isidorella bradshawi Iredale, 1943
Common name: Bradshaw’s pouch snail
Class Gastropoda
Infraclass Heterobranchia
Megaorder Hygrophila
Order Lymnaeida
Superfamily Planorboidea
Family Planorbidae
Subfamily: Miratestinae
Genus Isidorella Tate, 1896
Original name: Isidorella bradshawi Iredale, 1943. In Iredale, T. (1943). A basic list of the freshwater Mollusca of Australia. Australian Zoologist 10: 188-230.
Type locality: Tambellup, Western Australia.
On aquatic vegetation in ponds, billabongs, swamps and sluggish streams and rivers. Locally common. Feeds on algae and detritus. Egg mass a round to oval jelly containing several (up to 35 eggs). Development direct.
Southwest Western Australia.
A strongly shouldered shell similar in shape to Isidorella newcombi but lacks an umbilicus.
This genus is in need of revision, as the species concepts we have used have not been rigorously tested and can only be resolved by additional molecular and morphological studies involving dense sampling.
Hubendick, B. (1955). Phylogeny of the Planorbidae. Transactions of the Zoological Society of London 28: 453-542.
Smith, B. J. (1992). Non-marine Mollusca. Pp. i-xii, 1-408 in W. W. K. Houston. Zoological Catalogue of Australia, 8. Canberra, Australian Government Publishing Service.
Walker, J. C. (1988). Classification of Australian buliniform planorbids (Mollusca: Pulmonata). Records of the Australian Museum 40: 61-89.
