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Glacidorbis hedleyi Iredale, 1943

Diagnostic features

This species has rounded whorls (rarely dorsally subangled), and is sculptured with weak growth lines only. It reaches 2.9 mm in maximum diameter, but is usually around 2 mm.

Classification

Glacidorbis hedleyi Iredale, 1943

Class Gastropoda

Subclass Heterobranchia

Superfamily Glacidorboidea

Family Glacidorbidae

Genus Glacidorbis Iredale, 1943

Original name: Glacidorbis hedleyi Iredale, 1943. Iredale, T. (1943). A basic list of the freshwater Mollusca of Australia. Australian Zoologist 10: 188-230.

Type locality: Blue Lake, 35 feet, Mt Kosciusko, New South Wales.

Biology and ecology

In small streams (perennial and intermittent), springs and swamps in highlands, amongst moss, roots of water plants etc. Locally common. Feeds on small injured animals, such as insect larvae and other molluscs. Broods embryos in mantle cavity, the development therefore being direct.

Additional information on the biology and ecology of members of this family can be found in Fauna of Australia, vol. 5B, p. 1075-1076 and in Ponder and Avern (2000).

Distribution

This species occurs from northern New South Wales to mid-western Victoria.

Notes

Has most extensive range of all Glacidorbis species.

Further reading

Boulton, A. a. S., B.J. (1985). A range extension of the snail Glacidorbis hedleyi Iredale 1943 in Victoria. Victorian Naturalist 103: 123- 126.

Ponder, W. F. (1986). Glacidorbidae (Glacidorbacea: Basommatophora), a new family and superfamily of operculate freshwater gastropods. Zoological Journal of the Linnean Society 87: 53-83.

Ponder, W. F., Clark, S. A. & Dallwitz, M. J. (2000). Freshwater and estuarine molluscs: an interactive, illustrated key for New South Wales. Melbourne, CSIRO Publishing.

Ponder, W. F. & Avern, G. J. (2000). The Glacidorbidae (Mollusca: Gastropoda: Heterobranchia) of Australia. Records of the Australian Museum 52: 307-353.

Smith, B. J. & Kershaw, R. C. (1979). Field guide to the non-marine Molluscs of South-eastern Australia. Canberra, A.N.U. Press.