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Turbonilla fusca (A. Adams, 1855)

Description: Shell medium size, elongate and slender, up to 13 whorls. Protoconch coiled (Type B), of about 2 whorls, set on teleoconch with axis inclined at about 110 to teleoconch axis. Teleoconch whorls rounded, sculptured with about 20 strong axial folds, on last whorl terminating level with top of aperture; fine spiral threads between axials. Aperture teardrop-shaped, columella without plaits. Shell translucent white or pale brown becoming opaque with age, with a spiral brown band around middle of whorls.

Size: Up to 6 mm in length.

Distribution: Clarence River, NSW, southwards and around southern Australia to south-western WA, including Tas.

Habitat: Shallow subtidal, in estuaries and on the open coast. Common.

Remarks: Vafiadis (2007) described the external characters of the animal and figured the head-foot.

Fig. 1: Shelly Beach, 8 km S of Yamba, NSW (C.340512).

 

Copyright Des Beechey 2016