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Bathytoma agnata (Hedley and Petterd, 1906) Description: Whorls sculptured with a strong peripheral carina, bearing nodules that may degenerate into open, raised lamellae. Remainder of whorls with fine spiral threads, 20-30 below periphery of body whorl. Short oblique folds below suture, continuing as growth lines shaped as the outer lip, producing a cancellate effect on the body whorl when strong. Columella smooth, outer lip with deep, rounded V shaped sinus with apex at the peripheral carina. Colour white. Size: Up to 38 mm in length. Distribution: Endemic to Australia; Tweed Heads, NSW, to Eucla, SA. Habitat: Known from 60-1000 m. Moderately common. Remarks: A possible northern variant of this species occurs in southern Queensland. It is slightly larger, has larger but less numerous nodules on the peripheral carina, and lacks the oblique folds below the suture (Fig. 2). Fig. 1: East of Eden, NSW, 250-300 m (C.174319) Fig. 2: Off Swain Reefs, Queensland, 216-227 m (C.383085) |
