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Eatoniopsis voorwindei Ponder & Yoo, 1980

Description: Shell minute, moderately short spired, spire outline almost straight. Protoconch of 1 whorls, teleoconch of about 3 convex whorls. Surface smooth apart from weak growth lines and spiral scratches. Aperture elongate-ovate, outer lip orthocline (broken in figure). Inner lip thin over parietal wall, thicker below. Columella with distinct bulge deep within aperture (Fig. 2). Umbilicus narrow, partly hidden by inner lip of aperture. Colour brown.

Size: Up to 1.6 mm in length.

Distribution: Endemic to Australia. Port Stephens, NSW, southwards to Bass Strait.

Habitat: Lives on algae in the lower littoral and sublittoral (Ponder & Yoo, 1980). Uncommon.

Comparison: This species is distinguished within the group in NSW by having the umbilicus narrowly open accompanied by a bulge on the columella.

Figs. 1, 2: Green Cape, NSW (C.106215)

 

Copyright Des Beechey 2012