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. ramsayi ramsayi, the shell is larger than that of F. ramsayi royana and the inner lip is more closely applied to the parietal wall.
Fluviopupa ramsayi ramsayi (Brazier, 1889)
Class Gastropoda
Infraclass Caenogastropoda
Order Littorinida
Suborder Rissoidina
Superfamily Truncatelloidea
Family Tateidae
Genus Fluviopupa Pilsbry, 1911
Original name: Bythinella ramsayi Brazier, 1889. In Brazier, J. (1889) Mollusca. Australian Museum Memoir 2: 22-30, plts 4-5.
Type locality: Eastern flanks of Mt. Lidgebird, Lord Howe Island, in steep gullies running down to the shore.
Lives in small seepage pools on bare rock and in moss and under stones in small steams.
Eastern slopes of Mt. Lidgebird, Lord Howe Island.
The Lord Howe Island Fluviopupa species are rather similar in appearance but the different taxa are in distinct geographical locations on Lord Howe Island.
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.
