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Notogibbula bicarinata (Adams, 1854)

Description: Body whorl with strong shoulder and basal angulations; slightly concave between shoulder and suture, and between shoulder and basal angulation; whole surface sculptured with microscopic spiral threads. Umbilicus open, deep. Columella curved, smooth, partly reflected over umbilicus. Outer lip not thickened, smooth internally. Colour pink or fawn, sometimes with dark brown axial streaks; umbilicus and aperture white.

Size: Up to 11 mm high, 11 mm wide.

Distribution: Endemic to Australia; Wooli, NSW, to south-western WA, including Tas.

Habitat: Lives on seaweed subtidally; mainly known from beach shells. Uncommon.

Synonym: Gibbula coxi Angas, 1867

Figs. 1,2: Woolga, NSW (C.349699)

Fig. 3: Kurnell, Botany Bay, NSW (C.349664)

Page change history: Specimen C.349699 rephotographed; Figure 3 added; 25 Apr 2007