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Epitonium carchedon (Iredale, 1936)

Description: Shell slender for genus, whorls connected. Whorls rounded, with 20-24 axial ribs on last whorl. Most ribs thin, low to moderately tall, not rolled back, peaked below suture, not aligned from whorl to whorl; one or two thickened ribs per whorl. Interspaces with about 12 strong spiral threads. Aperture oval, outer lip with thick rib externally. Umbilicus closed. Colour white. Operculum unknown.

Size: Up to 8.5 mm in length.

Distribution: Australia and Japan. In Australia, known from only four lots -  Sydney Harbour dredgings (type); dredged in Botany Bay; off Sydney, 82 m; Michaelmas Cay, Queensland. In Japan, known from two localities off Kii Peninsula in about 100 m (Nakayama, 2003).

Habitat: Known only from empty shells.

Comparison: See "Identification of the NSW species of Epitonium" in the introduction to this family.

Fig. 1: HOLOTYPE Sydney Harbour, dredge Triton (C.060651)


Copyright Des Beechey 2008