This species is a member of the B. launcestonensis group, all of which are of medium size for the genus (2.0-4.2 mm in length), and rather globular. Although the animal of this species is unknown, other similar species have a simple penis. Found in the mid north and north-eastern parts of Tasmania.
B. tumida is similar in shell features to B. wilmotensis and B. inflata but has a shorter spire. It has not been investigated since its rediscovery so its anatomy is unknown.
Beddomeia tumida (Petterd, 1889)
Class Gastropoda
Infraclass Caenogastropoda
Order Littorinida
Suborder Rissoidina
Superfamily Truncatelloidea
Family Beddomeiidae
Original name: Beddomeia launcestonensis var. A. tumida Petterd, 1889. In Petterd, W. F. (1889). Contributions for a systematic catalogue of the aquatic shells of Tasmania. Papers and Proceedings of the Royal Society of Tasmania 1888: 60-83.
Type locality: The Great Lake, Tasmania.
This species, was until recently, not recollected since the damming of the Great Lake.
Apparently restricted to Great Lake, Tasmania.
All species of Beddomeia are geographically isolated and have restricted ranges.
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.
