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Beddomeia salmonis Ponder and Clark, 1993

Diagnostic features

Species included in the B. bellii group are small to medium-sized (2.3-3.0 mm in length), ovate-conic to ovate and usually have a columella swelling. The penis is simple (as in B. bellii and B protuberata) or with a lenticular brown gland in the middle. Species in this group are restricted to north western Tasmania.

Differs from other related species B.mesibovi, B.topsieae, B. gibba and B. [1] [2]fultoni in the male genital system having small (not large) lobes on the concave medial edge of the penis and the prostate gland extends less (about 1/3) into the pallial roof.

Classification

Beddomeia salmonis Ponder and Clark, 1993

Class Gastropoda

Subclass Caenogastropoda

Order Littorinimorpha

Superfamily Truncatelloidea

Family Tateidae

Genus Beddomeia Petterd, 1889

Original name: Beddomeia salmonis Ponder and Clark, 1993 in Ponder, W.F., Clark, G.A., Miller, A.C. and Toluzzi, A. (1993). On a major radiation of freshwater snails in Tasmania and eastern Victoria: a preliminary overview of the Beddomeia group (Mollusca: Gastropoda: Hydrobiidae). Invertebrate Taxonomy 7: 501-750.

Type locality: Small tributary of Salmon River, at junction of Salmon Road and Lerunna Road, Tasmania.

Biology and ecology

On wood in streams. Egg capsules atypical of Beddomeia, with flattened dorsal surface. Contain a single egg. Development direct.

Distribution

This species is only known from the Salmon River, Tasmania.

Notes

All species of Beddomeia are geographically isolated and have restricted ranges.

This species is on the Tasmanian Threatened species list of Invertebrate Animals as Rare (small population at risk).

Further reading

Ponder, W. F., Clark, G. A., Miller, A. C. & Toluzzi, A. (1993). On a major radiation of freshwater snails in Tasmania and eastern Victoria: a preliminary overview of the Beddomeia group (Mollusca: Gastropoda: Hydrobiidae). Invertebrate Taxonomy 7: 501-750.