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Vitreolina commensalis (Tate, 1898)

Description: Shell relatively small, spire slightly to strongly bent, protoconch large. Whorls straight or convex in outline, smooth. Scars from previous positions of outer lip faint, aligned from whorl to whorl, suture not bent at positions of scars. Aperture wide, one-quarter of shell length, expanded anteriorly. Outer lip strongly convex in profile, sinuous with small sinus below suture. Shell transparent, becoming opaque white with age.

Size: Up to 4.5 mm in length.

Distribution: Specimens seen from Port Stephens, NSW, southwards and around southern Australia, to south-western WA.

Habitat: Reported by Tate (1898) to be commensal with the sea urchin Amblypneustes sp. Moderately common.

Fig. 1: Watsons Bay, Sydney, NSW (C.011594)


Copyright Des Beechey 2015