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Fossarus sydneyensis Hedley, 1900 Description: Protoconch smooth, of 1¼ whorls, with sharp transition to sculptured teleoconch. Teleoconch up to 2 ¾ whorls. Whorls rounded, with widely spaced spiral cords, 4 on penultimate whorl and 10-11 on last whorl; 2-4 threads between spiral cords. Aperture wide, almost semicircular; anterior canal a broad, shallow sinus. Columella callus sharp edged, leaving a narrow umbilical slit. Outer lip thin, crenulated by external sculpture. Colour white. Size: Up to 5 mm in length. Distribution: Known from Woolgoolga southwards to Twofold Bay, NSW. Habitat: Unknown; all specimens available are empty shells, most beach collected. Remarks: This species was assigned to Fossarus on shell characters when first described in 1900; the animal has never been studied, so the placement must be considered as provisional. Figs. 1,2: Balmoral Beach, Middle Harbour, Sydney (C.170460) |
