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Epitonium robillardi (Sowerby, 1894) Description: Shell broad for genus, variable in height to width ratio; whorls connected. Whorls rounded, with 18-26 axial ribs per whorl. Ribs mainly thin and high, some thickened, not peaked; not continuous from whorl to whorl. Interspaces smooth. Aperture oval; outer lip with normal rib externally. Umbilicus slightly open, almost concealed by inner lip of aperture. Colour fawn or light brown, with two brown spiral bands on each whorl. Operculum corneous. Size: Up to 19 mm in length. Distribution: Indo-West Pacific. Full extent of Australian range unknown, but in eastern Australia occurs in Queensland and NSW, as far south as Sydney. Habitat: Known from empty shells from beach washup. Comparison: See "Identification of the NSW species of Epitonium" in the introduction to this family. Fig. 1: Gunnamatta Bay, Port Hacking, NSW (C.unreg) |
