Species of the B. hullii group are found in the northern half of Tasmania. Their shells are small (1.7-3.7 mm in length; most less than 3.5 mm), simple, ovate-conic to broadly conic, with a thin inner lip and no columellar bulge. The periphery of the last whorl of the shell is rounded, subangled or angled and the penis simple.
This species shares, with B. fallax, the same position of the joining of the bursal and oviduct at the posterior pallial wall. The two taxa can be readily distinguished by the position of the posterior loop of the coiled oviduct, which extends to the posterior edge of the bursa copulatrix in B. camensis and well beyond it in B. fallax, and by the relative length of the albumen gland in the mantle cavity, about 1/3 in B. fallax and 2/3 in B. camensis.
Beddomeia camensis Ponder & Clark, 1993
Class Gastropoda
Infraclass Caenogastropoda
Order Littorinida
Suborder Rissoidina
Superfamily Truncatelloidea
Family Beddomeiidae
Original name: Beddomeia camensis Ponder & Clark, 1993. In 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.
Type locality: Tributary of Cam River, on Oonah Road, Tasmania.
This species lives in a large stream under large, stable rocks which are not in the swiftest flowing parts. Egg capsules presumably like those of other species of Beddomeia - dome-shaped, with broad attachment base, covered with minute, mainly white sand grains and other fragments and containing a single egg. Development direct.
Only known from type locality and a few nearby locations in NW Tasmania.
All species of Beddomeia are geographically isolated and have restricted ranges.
Two species of Austropyrgus are also found at the locality where this species occurs.
This species is on the Tasmanian Threatened Species Protection Act 1995 as Endangered.
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.
