Print Fact Sheet

Fluviopupa gracilis erskinensis Ponder, 1982

Diagnostic features

Fluviopupa gracilis is separated from F. ramsayi in having an elongate-pupoid shell, and the distal end of the penis is longer (not shorter) than the accessory lobe. The pupoid shell has 5 whorls and tends to be longer and narrower than F. gracilis gracilis and the mantle is black and the head-foot has some pigmentation. The operculum either lacks or has a minute white spot on the inner side. In F. gracilis colmani the mantle is weakly pigmented and the head-foot unpigmented.

Classification

Fluviopupa gracilis erskinensis Ponder, 1982

Class Gastropoda

Subclass Caenogastropoda

LittorinimorphaOrder Littorinimorpha 

Superfamily Truncatelloidea

Family Tateidae

Genus Fluviopupa Pilsbry, 1911

Original name: Fluviopupa gracilis erskinensis 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: Stream behind Golf Course( to SSE of club building and just over fence in reserve). At approximately 45 metres in southwestern corner of Erskine Valley; in small stream with pools and falls, very rugged and steep; probably only a few pools and seepage on vertical faces when dry.

Biology and ecology

In small streams under and on rocks, leaves and moss and on vertical rock surfaces of seeps and waterfalls.

Distribution

Lord Howe Island. Erskine Valley.

Notes

The Lord Howe Island Fluviopupa species are rather similar in appearance but the different taxa are  in distinct geographical locations on Lord Howe Island.

Further reading

Ponder, W. F. (1982). Hydrobiidae of Lord Howe Island (Mollusca: Gastropoda: Prosobranchia). Australian Journal of Marine and Freshwater Research 33: 89-159.