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Odostomia tumerae (Laseron, 1951)

Description: Shell very small, moderately wide, spire weakly convex, up to 3 teleoconch whorls, last whorl more than half total shell length. Protoconch infolded, type C. Teleoconch whorls rounded, glossy, without sculpture; suture well defined. Aperture length almost twice the width, columella with weak plait, umbilicus closed or slightly open. Shell partly translucent, becoming opaque white with age.

Size: Up to 1.6 mm in length.

Distribution: Endemic to Australia. Syntypes are from Gunnamatta Bay, Port Hacking, Sydney. Other specimens are from Georges River, Sydney, and from Middle Harbour, Sydney.

Habitat: Known from empty shells from beach washup and dredgings from 15 m. Rare.

Fig. 1: Gunnamatta Bay, NSW (C.105385 SYNTYPE). Photo: Australian Museum.


Copyright Des Beechey 2017