Well-developed axial costae over the whole surface; weak spiral cords, but no spiral keels.
Glacidorbis costatus Ponder & Avern, 2000
Genus Glacidorbis Iredale, 1943
Original name: Glacidorbis costatus Ponder & Avern, 2000. Ponder, W. F. and. Avern, G. J. (2000). The Glacidorbidae (Mollusca: Gastropoda: (Heterobranchia) of Australia. Records of the Australian Museum 52: 307–353.
Type locality: Pulbeena Swamp, south of Smithton, north-western Tasmania (extinct but empty shells in sediment of this recently drained swamp).
Biology and ecology
In peaty marl deposits in Pulbeena Swamp, Tasmania; extinct.
Additional information on the biology and ecology of members of this family can be found in Fauna of Australia, vol. 5B, p. 1075-1076 and in Ponder and Avern (2000).
Pulbeena Swamp, south of Smithton, north-western Tasmania.
An apparently extinct species only known from the dained Pulbeena Swamp in north-western Tasmania.
Ponder, W. F. (1986b). Glacidorbidae (Glacidorbacea: Basommatophora), a new family and superfamily of operculate freshwater gastropods. Zoological Journal of the Linnean Society 87: 53-83.
Ponder, W. F. & Avern, G. J. (2000). The Glacidorbidae (Mollusca: Gastropoda: Heterobranchia) of Australia. Records of the Australian Museum 52: 307-353.