This minute species (maximum length of the shell about 1.5 mm) has fine spiral striae. The operculum has 1-2 white pegs.
The penis is simple in all Hemistomia species.
Hemistomia minutissima Ponder,1982
Genus Hemistomia Crosse, 1872
Original name: Hemistomia minutissimus Ponder,1982. Ponder, W.F. (1982) Hydrobiidae of Lord Howe Island (Mollusca: Gastropoda: Prosobranchia). Australian Journal of Marine and Freshwater Research 33: 89-159.
Type locality: At head of minor tributary above main tributary on north side of Erskine Valley, Lord Howe Island.
Biology and ecology
A subterranean species possibly induced in response to an impermanent water supply. It lives associated with small seepages.
Additional information on the biology and ecology of members of this family can be found in Fauna of Australia, vol. 5B, p. 752-755.
Northern side of Erskine Valley, Lord Howe Island.
All the Hemistomia species are strongly clustered into distinct geographical locations on Lord Howe Island. H. minutissima is a tiny subterranean species.
Ponder, W. F. (1982). Hydrobiidae of Lord Howe Island (Mollusca: Gastropoda: Prosobranchia). Australian Journal of Marine and Freshwater Research 33: 89-159.