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Austropyrgus otwayensis Clark, Miller & Ponder 2003

Diagnostic features

This species is most similar in shell shape to A.macedonensis, A. daylesfordensis, A. grampianensis and A.colensis but differs from these taxa in several anatomical characters. Other similar taxa include A.cooma, A. monaroensis, A. avius, A. bullerensis, A. viridarium, A. smithii, A. nanus, A. parvus and A. pisinnus. Differs from other species in the following combination of characters: shell small to medium in size, spire outline straight to weakly-convex; aperture slightly disjunct; central teeth with 3 pairs of basal cusps, ctenidium with 20–21 filaments; seminal receptacle at anterior edge of bursa copulatrix; ovary lobulate.

Classification

Austropyrgus otwayensis Clark, Miller & Ponder 2003

Class Gastropoda

Subclass Caenogastropoda

Order Littorinimorpha 

Superfamily Truncatelloidea

Family Tateidae

Genus Austropyrgus Cotton, 1942

Original name: Austropyrgus otwayensis 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: Erskine River, 80 m above Erskine Falls, Otway Range, west of Lorne, Victoria

Biology and ecology

On weeds, leaves, roots and stones. Can be locally abundant.

Distribution

Small streams and rivers of the Otway Ranges, Victoria.

Notes

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

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.