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Agatha angusta (Laseron, 1951)

Description: Shell large for family, elongate and slender, up to 9 whorls, last whorl almost half of shell length. Whorls increasing in diameter rapidly over first four whorls, then increasing more slowly, with 9th whorl inflated. Protoconch coiled (Type B) of about 2 whorls, set on teleoconch with axis inclined at about 110 to teleoconch. Teleoconch whorls straight-sided, suture well defined. Whorls without spiral or axial sculpture. Aperture more than twice as long as wide, with very strong plait on columella. Shell glossy, white.

Size: Up to 10 mm in length

Distribution: Endemic to Australia: Southport, Qld, southwards to Twofold Bay, NSW

Habitat: Empty shells are known from beach washup and down to 15 m.

Fig. 1: Shellharbour, NSW (C.105301 HOLOTYPE)


Copyright Des Beechey 2016