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Cinctiuga diaphana (Verco, 1906)

Description: Shell small, spire straight-sided, up to 6 whorls. Protoconch (Type B) coiled, set on teleoconch with axis inclined at about 110 to teleoconch axis, apex submerged. Teleoconch whorls uniformly rounded or weakly to strongly angled, sculptured with about 10 fine spiral threads; spirals continue onto base of last whorl; suture distinct. Aperture teardrop-shaped, length greater than width; no plaits on columella. Shell translucent becoming opaque white with age.

Size: Up to 2.7 mm in length.

Distribution: Specimens available from Australia, South Africa, Tanzania, and Papua New Guinea. In Australia, from Port Stephens, NSW, southwards and around southern Australia to south-western WA.

Habitat: Most specimens are empty shells from beach washup and dredgings down to 20 m, but there are two lots that appear to be the same species form 93114 m off Rottnest Island, WA. Common.

Fig. 1:  Batemans Bay, Surf Beach, NSW (C.342682).

 

Copyright Des Beechey 2016