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Laciniorbis morti Iredale, 1931

Description: Shell low-spired, protoconch and first whorl depressed. Teleoconch loosely coiled, rapidly expanding, suture canaliculate; irregular flange on periphery. Last whorl rounded above periphery, weakly convex below. Spiral sculpture of about 16 cords above periphery, spaced at about the cord width; axial sculpture absent. Base rounded, with about five strong or weak spiral cords, sometimes with a few finer threads between each. Umbilicus widely open. Aperture with canal on periphery. Colour white.

Size: Up to 10 mm wide, 3.5 mm high.

Distribution: Endemic to Australia: known from Cape Moreton, Queensland, southwards to Sydney, NSW.

Habitat: Known only as empty shells from 49-124 m, plus subsurface dredgings from Sydney Harbour. Only six specimens in Australian Museum collection. Rare.

Figs. 1, 2, 3: Probably Sydney Harbour dredgings (C.Unregistered)


Copyright Des Beechey 2014