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Pyrgulina pascoei (Angas, 1867)

Description: Shell large for family, variable in width and shape of aperture (Fig. 2), spire weakly convex, up to 9 teleoconch whorls, last whorl about half total shell length. Protoconch infolded, type C. Teleoconch whorls rounded, suture well defined. Whorls sculptured with strong axial folds, extending onto base on last whorl, with dense spiral threads in interspaces. Aperture wide, length about 1 times width, with moderately strong plait on columella; umbilicus sometimes slightly open, outer lip expanded anteriorly. Shell opaque white.

Size: Up to 9.5 mm in length, usually less than 7 mm.

Distribution: The distribution is unclear because the synonymy is unclear. It certainly occurs throughout all of NSW.

Habitat: Lives intertidally in hidden situations on rocky shores. Empty shells are common in beach washup and in dredgings down to 15 m.

Synonymy: Odostomia kreffti Angas 1867 was recognised as a synonym by Hedley (1917, p. 716). Pyrgulina spissa Laseron, 1959, from Qld and NT is regarded as a synonym in the Australian Museum collection. 

Remarks: The living animal was described and figured by Hedley (1917, p. 716.)

Figs. 1, 2: NSW (C.277604). All specimens from same lot.


Copyright Des Beechey 2016