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Austropyrgus privus Clark, Miller & Ponder 2003

Diagnostic features

This species belongs to the Austropyrgus petterdianus group, whose members are characterised by the following shell features: the shell aperture slightly disjunct, with last whorl and base evenly convex. The outer lip is without reflection, and the colour of shell is yellow-brown and translucent. A. privus differs from other members of the group in the following combination of characters: shell small, with very elongated spire and straight to weakly-convex spire outline, inner lip firmly adhering to the parietal wall, outer lip heavily thickened; pallial vas deferens strongly undulating at prostate gland; penis attached centrally on head.

Classification

Austropyrgus privus Clark, Miller & Ponder 2003

Class Gastropoda

Subclass Caenogastropoda

Order Littorinimorpha

Superfamily Truncatelloidea

Family Tateidae

Genus Austropyrgus Cotton, 1942

Original name: Austropyrgus privus Clark, Miller & Ponder 2003. Clark, S. A., Miller, A. C. and Ponder, W. F. (2003). Revision of the snail genus Austropyrgus (Gastropoda: Hydrobiidae): A morphostatic radiation of freshwater gastropods in southeastern Australia.  Records of the Australian Museum Supplement 28: 1–109.

Type locality: Keddies Creek at Dial Road, south of Penguin, Tasmania.

Biology and ecology

In streams on water weeds, hard substrate (rocks etc.) and crawling on litter and sediment. Can be locally abundant. Assumed to feed by scraping bacteria and microalgae. Lay solitary capsules containing a single egg. Direct development.

Additional information on the biology and ecology of members of this family can be found in Fauna of Australia, vol. 5B, p. 752-755.

Distribution

This species is currently only known from a small stream south of Penguin in northern Tasmania.

Notes

Most members of Austropyrgus, including this species, are geographically isolated and have restricted ranges.

This species is not found in sympatry with any other species of Austropyrgus.

Further reading

Clark, S. A., Miller, A. C. & Ponder, W. F. (2003). Revision of the snail genus Austropyrgus (Gastropoda: Hydrobiidae): a morphostatic radiation of freshwater gastropods in southeastern Australia. Records of the Australian Museum 28: 1–109.