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Fluviopupa gracilis gracilis (Iredale, 1944)

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. In F. gracilis gracilis the mantle is darkly pigmented and the pupoid shell has 3.7  to 4 whorls which have impressed sutures and the operculum has a small  white smear on the inner side.


Fluviopupa gracilis gracilis (Iredale, 1944)

Class Gastropoda

Subclass Caenogastropoda

Order Littorinimorpha 

Superfamily Truncatelloidea

Family Tateidae

Genus Fluviopupa Pilsbry, 1911

Original name: Pupidrobia gracilis Iredale, 1944. Iredale,T. (1944) The land Mollusca of Lord Howe Island Australian Zoologist 10: 299-334.

Type locality: Little Slope, Lord Howe Island.

Biology and ecology

Found in small creeks and seepage pools on rock surfaces.


Lord Howe Island. Little Slope, western side of Mt. Gower.


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

Iredale, T. (1944). The land Mollusca of Lord Howe Island. Australian  Zoologist 10: 299-334, pls XVII-XX.

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