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
Class Gastropoda
Infraclass Caenogastropoda
Order Littorinida
Suborder Rissoidina
Superfamily Truncatelloidea
Family Tateidae
Genus Hemistomia Crosse, 1872
Original name: Hemistomia minutissimus Ponder,1982. In 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.
A subterranean species possibly induced in response to an impermanent water supply. It lives associated with small seepages.
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.
