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 species of Insuladrobia.
Insuladrobia minutissima (Ponder,1982)
Class Gastropoda
Infraclass Caenogastropoda
Order Littorinida
Suborder Rissoidina
Superfamily Truncatelloidea
Family Tateidae
Genus Insuladrobia Ponder & Köhler, 2024
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.
Ponder, W. F. (1982). Hydrobiidae of Lord Howe Island (Mollusca: Gastropoda: Prosobranchia). Australian Journal of Marine and Freshwater Research 33: 89-159.
Ponder, W. F., & Köhler, F. (2024). A review of the relationships of the Tateidae of Lord Howe Island. Molluscan Research, pp. 1–7. https://doi.org/10.1080/13235818.2024.2355680
