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Rissoella fallax Ponder & Yoo, 1977

Description: Shell minute, globose, spire about of aperture height. Protoconch of 1  whorls, coiled about same axis as teleoconch.. Teleoconch up to 2 whorls; whorls strongly convex, smooth apart from indistinct growth lines. Aperture wide, outer lip thin and simple, inner lip reflected towards umbilicus. Umbilicus narrowly open. Shell initially colourless transparent, becoming opaque white with age.

Size: Up to 1.7 mm in length.

Distribution: Endemic to Australia. Known from central NSW southwards to Tasmania and central Victoria.

Habitat: Lives on algae in the lower littoral and sublittoral. Uncommon.

Comparison: See R. secunda.

Fig.1 Wimble Beach, Batemans Bay, NSW (C.101422, PARATYPE).


Copyright Des Beechey 2016