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Syrnola tasmanica (Tenison-Woods, 1877)

Description: Shell medium size, moderately slender, spire convex, up to 7 whorls, last whorl 40% of total shell length. Protoconch (type B) coiled, of about 2 whorls, set on teleoconch with axis inclined at 110 to teleoconch. Teleoconch whorls straight-sided or slightly rounded, suture moderately indented, whorls smooth, without sculpture. Aperture teardrop-shaped, moderately wide, columella with one moderately strong plait, inner lip of aperture expanded outwards below plait. Shell white or fawn.

Size: Up to 4.3 mm in length.

Distribution: Available specimens are from the far south of NSW, from Cookhaven to Disaster Bay. Also reported from Vic and Tas.

Habitat: Available specimens were dredged from 9-60 m. Rare in NSW.

Remarks: In using the name Syrnola tasmanica I am following the Australian Museum collection, but I have doubt that this is correct. The specimen figured here agrees quite well with the figure given by May (1923, pl. 44, fig. 13) but not that of  Laseron (1951, 305, fig. 12). Examination of the type material, which is in the Tasmanian Museum, is required to resolve the matter.

Fig. 1: Twofold Bay, NSW, dredged in 15 m (C.341042). Specimen discoloured with age.

 

Copyright Des Beechey 2016