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Bouchetriphora aspergata (Laseron, 1958)

Description: Shell relatively small, sinistral. Protoconch planktotrophic, of 4-5 whorls, with 1 spiral thread and dense axial riblets. Teleoconch whorls with 4 strongly beaded spiral cords and axial costae; spirals 1 and 3 start immediately after protoconch, spiral 2 on 6th or 7th teleoconch whorl. Spirals 1 and 3 of similar strength on penultimate whorl, spiral 2 weaker. Spiral 4 slightly exposed on all whorls. Another 2 spirals on base (numbered 5 and 6), smooth. Axial costae number 16-19 on penultimate whorl. Outer lip of aperture flared (broken in figures), anterior siphonal canal short, posterior canal a shallow notch. Colour fawn with brown between nodules on spirals 1 and 3; columella salmon.

Size: Adult shells 3.8 - 5.5 mm in length.

Distribution: Papua New Guinea and Australia. In Australia, north Qld southwards to Sydney, NSW.

Habitat: Intertidal from algal washings, subtidal to 70 m, and from beach washup. Moderately common.

Comparison: This species is distinguished by the brown colouration between the nodules on spirals 1 and 3.

Synonymy: Coriophora nigrogranosa Laseron 1958 is a previously recognised synonym.

Figs. 1, 2: Woolgoolga, NSW (C.113418) (Outer lip broken)

 

Copyright Des Beechey 2015