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Austroliotia scalaris (Hedley, 1903)

Description: Shell moderately solid and heavy, height equal to width, whorls angled. Last whorl with seven or eight spiral ribs; two weak ribs on shoulder, three or four strong ribs on periphery, one weak rib on outside of base, one large, beaded rib bordering umbilicus, one beaded rib within umbilicus; ribs on periphery with open-fronted spines, the uppermost strongest. Whole surface covered with dense axial lamellae. Aperture circular, surrounded by greatly thickened varix. Umbilicus deep, narrow, with strong axial lamellae within. Colour uniformly white or fawn.

Size: Up to 8 mm high, 8 mm wide.

Distribution: Endemic to Australia: Fraser Island, Queensland, to Brush Island, southern NSW.

Habitat: Known from 26-210 m. Uncommon.

Comparison: This species has sculpture similar to Munditia tasmanica, but is taller with a narrower umbilicus.

Synonymy: Liotina saxa Laseron, 1954 (NEW SYNONYM) is based on a specimen of this species with worn or poorly developed spines and axial lamellae.

Remarks: Occurs in moderately deep water, and is not known as beach specimens.

Figs. 1,2,3  Off Sydney, 200 m (C.357644).

Fig. 4  HOLOTYPE of Liotina saxa Laseron, 1954 (C.153268)


Copyright Des Beechey 2004