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Chrysallida henni (Brazier, 1894)

Description: Shell medium size, wide, spire straight-sided or weakly rounded, up to 5.5 teleoconch whorls, last whorl of total shell length. Protoconch (type B) coiled, of about 2 whorls, set on teleoconch with axis inclined at about 110 to teleoconch. Teleoconch whorls straight-sided or weakly rounded, suture strongly indented, whorls sculptured with about 20 strong, inclined axial ribs with fine spiral threads in interspaces. Last whorl with axials terminating at a deep spiral groove with a smooth cord below; base smooth. Aperture wide, with a strong tooth on columella. Shell colourless transparent becoming opaque white with age.

Size: Up to 5.5 mm in length, usually less than 4 mm.

Distribution: Tropical Indo-West Pacific. In eastern Australia, from Torres Strait, Qld, southward to Ulladulla, NSW.

Habitat: Empty shells are known from beach washup and, in NSW, down to 26 m.

Synonymy: Paragila elongata Laseron, 1959 is a previously recognised synonym.

Fig. 1: Merimbula Jetty, NSW (C.342600).


Copyright Des Beechey 2017