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Fluviopupa gracilis pupa (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 pupa the mantle and head-foot are darkly pigmented and the pupoid shell has about 4 whorls which have impressed sutures and the operculum has a well-developed white smear on the inner side.


Fluviopupa gracilis pupa (Iredale, 1944)

Class Gastropoda

Subclass Caenogastropoda

Order Littorinimorpha 

Superfamily Truncatelloidea

Family Tateidae

Genus Fluviopupa Pilsbry, 1911

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

Type locality: Stream behind Golf Course (to SSE of club building and just over fence in reserve). Creeks at Old Settlement, Lord Howe Island.

Biology and ecology

In pools of small creeks on and under stones and leaves.


Lord Howe Island. Creeks behind Old Settlement Beach.


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.