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Duplicaria bernardii (Deshayes, 1857)

Description: Whorls convex with deep subsutural groove. Axial sculpture of strong nodules above subsutural groove aligned with axial ribs below, about 15-20 on penultimate whorl; ribs fading out at base. Spiral sculpture of microscopic, irregular grooves. Fasciolar band well defined, with raised sharp upper edge in mature shells; siphonal notch deep. Outer lip thin, simple. Apex colour dark brown; teleoconch coloured with grey, fawn or brown spiral band at or below the subsutural groove and on base of body whorl; body whorl with white central band.

Size: Up to 60 mm in length, usually less than 30 mm in NSW.

Distribution: Endemic to Australia. Duplicaria bernardii: North-west WA, around northern Australia to Moreton Bay, Queensland. Duplicaria vallesia: Mackay, Queensland, southwards to South West Rocks, NSW.

Habitat: Intertidal, known mainly from beach shells in NSW; common in northern Australia, uncommon in NSW.

Synonyms: This species was previously recorded in NSW as Duplicaria vallesia Hedley, 1912, but Garrard (1969) points out that D. bernardi varies substantially in colour and width of shell, and that D. vallesia is a slender cream and brown form of that species, with weaker than normal axial ribs. Terebra addita Deshayes, 1859 is another synonym.

Fig. 1 HOLOTYPE of Duplicaria vallesia Hedley, 1912. Trial Bay, NSW (C.028470)

Page Change Record: Distribution corrected 26 January 2012.

Copyright Des Beechey 2004