Large limpet-like planorbids with either smooth or spirally ribbed asymmetrical shells. Heterostrophic; apical portion a vestigial spire, projects to right, consisting of an almost complete whorl. Apical region with poorly developed spiral striations. Abrupt change between apex and main body of shell which is limpet-shaped. Mesocone of lateral teeth rounded with small denticles. The copulatory organ has a flagellum, and an accessory bursa is lacking. The penis is biramous with a terminal stylet on one ramus, or uniramous with a subterminal augur-like fold. The bursa copulatrix is spatulate. A rectal ridge is absent (Walker 1988).
Genus Ancylastrum Bourguignat, 1853
Original reference: Bourguignat, J. R. (1853). Catalogue des espèces du genre Ancylus. Journal de Concholologie 4: 169-199.
Type locality: Tasmania.
Synonyms: Legrandia Hanley in Legrand, W. 1872; Cumingia Clessin, 1882) Tasmancylus Iredale, 1926.
We follow Walker (1988) in this resource.
On stones in lakes of the Central Plateau of Tasmania.
Tasmania – lakes of the Central Plateau.
Baker, F. C. (1945). The molluscan family Planorbidae. Urbana USA, University of Illinois Press.
Beesley, P. L., Ross, G. J. B. & Wells, A., Eds. (1998). Mollusca: The Southern Synthesis. Parts A & B. Melbourne, CSIRO Publishing.
Hubendick, B. (1955). Phylogeny of the Planorbidae. Transactions of the Zoological Society of London 28: 453-542.
Hubendick, B. (1964). Studies on Ancylidae: the subgroups. Göteborgs Kungliga Vetenskaps och Vitterhets Samhälles Handligar Sjatte Foljden B 9: 1-72.
Iredale, T. (1943). A basic list of the fresh water Mollusca of Australia. Australian Zoologist 10: 188-230.
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.
Smith, B. J. & Kershaw, R. C. (1979). Field guide to the non-marine Molluscs of South-eastern Australia. Canberra, A.N.U. Press.
Smith, B. J. & Kershaw, R. C. (1981). Tasmanian Land and Freshwater Molluscs. Hobart, University of Tasmania.
Walker, J. C. (1988). Classification of Australian buliniform planorbids (Mollusca: Pulmonata). Records of the Australian Museum 40: 61-89.