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Fluviopupa gracilis colmani 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. In F. gracilis colmani the mantle is weakly pigmented and the head-foot unpigmented. The ovate-pupoid shell has 3.5 to 4 whorls and tends to be smaller and narrower, with less pronounced sutures than in F. gracilis gracilis. The operculum either lacks or has a minute white spot on the inner side.

Classification

Fluviopupa gracilis colmani Ponder, 1982

Class Gastropoda

Subclass Caenogastropoda

Order Littorinimorpha 

Superfamily Truncatelloidea

Family Tateidae

Genus Fluviopupa Pilsbry, 1911

Original name: Fluviopupa gracilis colmani 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). Snails in small pools in sandstone -clay, on undersides of stones and leaves.

Biology and ecology

In pools in small creeks and on moss and bare rock surfaces of seepages.

Distribution

Lord Howe Island. On western slopes of North Hummock, Intermediate Hill and Smoking Tree Ridge.

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.