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Odostomella opaca (Hedley, 1906)

Description: Shell small, elongate-ovate to pupoid, spire convex, up to 5 teleoconch whorls. Protoconch coiled (Type B,) of about 2 whorls, set on teleoconch with axis inclined at more than 90 to teleoconch. Teleoconch whorls weakly convex, sculptured with strong axial ribs, about 24 on last whorl; suture well defined. Aperture wide, a little longer than wide, columella with single plait, moderately strong, sometimes only visible deep with aperture. Shell reddish brown to purplish brown when fresh, fading to fawn.

Size: Up to 2.8 mm in length.

Distribution: Indo-West Pacific, from Japan to west coast of North America (Schander, Hori & Lundberg 1999). In eastern Australia, as far south as Sydney.

Habitat: NSW specimens are empty shells from beach washup. Rare in NSW.

Remarks: The anatomy of this species was described by Schander, Hori & Lundberg (1999).

Fig. 1: Port Moresby, Papua New Guinea (C.349541).


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