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Terebra ballina (Hedley, 1915)

Description: Whorls straight sided, sculptured from suture to suture with 15-22 oblique axial ribs, triangular in cross section, with no intervening flat spaces. Microscopic spiral grooves, about 10 per whorl, restricted to sides of ribs and base of body whorl. Subsutural grooves present only as punctations between ribs. Anterior fasciole well developed; siphonal notch shallow; inner lip expanded over columella. Outer lip simple, thin. Colour uniformly cream or fawn.

Size: Up to 34 mm.

Distribution: Endemic to Australia; Yeppoon, Queensland, to Sydney, NSW.

Habitat: Intertidal to 36 meters. Uncommon.

Comparison: This species is superficially similar to Duplicaria bernardi and Terebra venilia, but is separated by having oblique rather than straight axial ribs, and by the subsutural groove being present only as punctations between axial ribs.

Fig. 1: Lennox Head, NSW (C.161672)

Copyright Des Beechey 2004