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Vexitomina coriorudis (Hedley, 1922)

Description: Protoconch of two smooth whorls. Spire whorls with upper one-third concave, with curved axial growth lines below a carina at suture. Periphery of whorls with strong axial folds that fade out before lower suture. Surface from periphery to lower suture sculptured with spiral ribs, 4-6 on spire whorls, thickened and sometimes forming nodules where they cross axial folds. Axial growth lines variable in strength from faint to strong and lamellate, forming irregular beads at intersections with spirals when strong. Body whorl with about 25 spiral ribs from periphery to anterior end. Columella smooth, sometimes with weak nodule opposite sinus, anterior canal moderately long. Sinus above periphery, rounded V shaped. Colour fawn.

Size: Up to 23 mm in length.

Distribution: Endemic to Australia; known from Brisbane, Queensland, to Wollongong, NSW.

Habitat: Recorded from 281-550 m; uncommon.

Comparison: This species is similar to V. coxi and was confused with it by Laseron (1954a, p. 13). It is known only from deep water (281-550 m) whereas V. coxi occurs in shallower water, down to about 150 m. It is distinguished from other species in the genus by the strong spiral sculpture.

Fig. 1:  HOLOTYPE 27.5 miles east of Sydney, in 550 m (C.024404).

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Copyright Des Beechey 2004