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Socienna clava (Laseron, 1951)

Description (based on syntypes): Shell medium in size for family, narrowly conical, with a relatively large protoconch. Protoconch of 2 whorls, sculptured with spiral threads, about 6 on last whorl. Teleoconch weakly convex in outline, suture distinct. Whorls sculptured with 3 strong spiral cords; interspace between spirals 1 and 2 equal to width of spiral 1, between spirals 2 and 3 twice width of spiral 1. Spiral cords crossed by weaker axial ribs, forming circular or axially elongate beads at intersections; about 29 axials on last whorl. Base with a further spiral, then smooth, concave below. Outer lip of aperture broken in both syntypes; inner lip slightly thickened. Anterior canal a deep U-shaped notch. Shell translucent, fawn.

Size: Larger syntype 4.7 mm in length.

Distribution: Syntypes from off Long Reef, Collaroy, NSW, in 14 fathoms (25 m). No further specimens available.

Habitat: Subtidal.

Fig. 1: Off Long Reef, Collaroy, NSW, in 14 fathoms (25 m) (C.102758 SYNTYPE 1)

Fig. 2: Off Long Reef, Collaroy, NSW, in 14 fathoms (25 m) (C.102758 SYNTYPE 2)

 

Copyright Des Beechey 2016