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Turbonilla ambulatia (Laseron, 1951)

Description: Shell medium size for genus, up to 7 teleoconch whorls. Protoconch coiled (Type B), of about 2 whorls, set on teleoconch with axis inclined at about 110 to teleoconch axis. Teleoconch whorls turreted, sculptured with strong, widely spaced, axial folds, on last whorl terminating level with top of aperture; no spiral sculpture. Aperture wide, columella without plaits. Shell opaque white.

Size: Up to 4 mm in length.

Distribution: Endemic to Australia: Port Stephen, NSW, southwards to Sydney.

Habitat: Only 7 lots in Australian Museum collection. One dredged for 513 m, rest from beach washup. Rare.

Fig. 1: Long Reef, Collaroy, NSW (C.105379 HOLOTYPE). Photo Australian Museum

 

Copyright Des Beechey 2016