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Bouchetriphora marrowi B.A. Marshall, 1983

Description: Shell relatively small, sinistral. Protoconch planktotrophic, of 6-6 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 4th teleoconch whorl. By penultimate whorl, spiral 1 very strong, spirals 2 and 3 similar and weaker. Spiral 4 slightly exposed on all whorls. Another 2 spirals on base (numbered 5 and 6), smooth. Axial costae number 16-17 on penultimate whorl. Outer lip of aperture flared, anterior siphonal canal short and upturned, posterior canal a shallow notch. Colour bright reddish brown fading to yellowish brown, nodules paler.

Size: Adult shells 3.6 - 4.3 mm in length.

Distribution: Known only from Sydney Harbor and Long Reef, Collaroy, NSW.

Habitat: Known alive in the intertidal zone, and as empty shells from beach washup. Rare.

Comparison: Differs from the other two NSW species of the genus in colouration. It is similar to Hedleytriphora innotabilis, differing in protoconch sculpture, and is also similar to Mesophora granosa, differing in details of the axial costae.

Figs. 1, 2: Long Reef, Collaroy, Sydney, NSW (C.116221)

 

Copyright Des Beechey 2015