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5001-1.jpg (96532 bytes)

 

4999-1.jpg (101372 bytes)

Pisinna tasmanica (Tenison-Woods, 1876)

Description: Shell small, solid, spire tall, almost straight sided to moderately rounded in outline. Protoconch of 1 - 1 whorls, sculptured with spiral rows of minute pits, with distinct junction with teleoconch. Teleoconch up to 4 weakly convex whorls, grooved at sutures on last whorl; whorls smooth (Fig. 1), or with last 1 whorls with weak to strong oblique axial ribs (Fig. 2). Aperture almost circular, thickened internally, smooth externally or with very weak, broad varix. Colour reddish brown with white band below suture, last whorl fawn; whole shell usually faded to white.

Size: Up to 2.6 mm in length.

Distribution: Endemic to Australia: Cape Moreton, Queensland, southwards and around southern Australia as far as Cape Borda, SA, including Tasmania.

Habitat: On the continental shelf, 20-300 m. Common.

Comparison: See Comparison of Pisinna species

Synonymy: None.

Fig. 1: 5001-1 Port Stephens, NSW (C.353197)

Fig. 2: 4999-1 Same lot as Fig. 1

 

Copyright Des Beechey 2010. Modified 2014