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Nozeba topaziaca (Hedley, 1908)

Description: Shell minute, broadly conical, apex blunt, aperture about one-third shell length, about 4 teleoconch whorls. Protoconch of about 2 whorls, first whorl low, joining teleoconch with well-defined varix. Teleoconch whorls rounded, smooth and polished, a few spiral threads on first half-whorl and on base. Aperture tear-drop shaped,; outer lip simple, inner lip sharp edged making ridge along columella. Colour translucent when fresh becoming opaque with age, sometimes with dark brown periostracum.

Size: Up to 3.3 mm in length.

Distribution: Endemic to Australia. Gladstone, Qld, southwards and around southern Australia to Streaky Bay, SA, including Tasmania.

Habitat: Known from seagrass intertidally, and in dredgings from down to about 70 m. Moderately common in beach washup.

Synonymy: Estea amblycorymba Cotton, 1944 from St. Vincents Gulf, SA, is a synonym.

Fig. 1: HOLOTYPE Balmoral Beach, Middle Harbour, Sydney, NSW (C.29112). (Photo: Australian Museum)


Copyright Des Beechey 2014