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Austropyrgus centralia (Ponder, Colgan, Terzis, Clark & Miller, 1996)

Diagnostic features

This species is distinguished from the similar and co-occurring Caldicochlea harrisi by having a small, conical shell and a more evenly conical spire outline. A. centralia also differs from both species of Caldicochlea  in having more prominent opercular pegs, multiple (not two) basal denticles on the central teeth, as well as considerable differences in the female genital system and penial morphology.

Classification

Austropyrgus centralia (Ponder, Colgan, Terzis, Clark & Miller, 1996)

Class Gastropoda

Subclass Caenogastropoda

Order Littorinimorpha

Superfamily Truncatelloidea

Family Tateidae

Genus Austropyrgus Cotton, 1942

Original name: Fluvidona centralia Ponder, Colgan, Terzis, Clark & Miller, 1996. Ponder, W. F., Colgan, D. J, Terzis, T., Clark, S. A and Miller, A. C. (1996). Three new morphologically and genetically determined species of hydrobiid gastropods from Dalhousie Springs, northern South Australia, with the description of a new genus. Molluscan Research 17: 49–106.

Type locality: Spring Cd11, Dalhousie Springs, South Australia.

Biology and ecology

Found in a few small (cold) isolated seeps and in shallow lower cold outflows distant from the warm to hot water sources of large springs.

Distribution

Dalhousie Springs, northern South Australia.

Notes

This is one of two species of Austropyrgus occurring far outside the range of the majority of species, being found in Dalhousie Springs in the far north of South Australia, while the other (A. bunyaensis) is found in southern Queensland.

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.

Colgan, D. J. & Ponder, W. F. (2000). Incipient speciation in aquatic snails in an arid-zone spring complex. Biological Journal of the Linnean Society 71: 625-641.

Ponder, W. F., Colgan, D. J., Terzis, T., Clark, S. A. & Miller, A. C. (1996). Three new morphologically and genetically determined species of hydrobiid gastropods from Dalhousie Springs, northern South Australia, with the description of a new genus. Molluscan Research 17: 49-109.