This genus is generally similar to Austropeplea but differs in its larger size and in having a distinctive twist in the columella. They have a fully aquatic (rather than amphibious) habit. These large-sized globose snails have large apertures and low to medium spires. The animal has fleshy triangular tentacles.
Genus Bullastra Bergh, 1901
Type species: Bullastra velutinoides Bergh, 1901 (=Bullastra cumingiana (Pfeiffer, 1855))
Original reference: Bergh, R. (1901) (1870-1908). Malacologische Untersuchungen in Semper, C. Reisen im Archipel der Phillippinen , Theil 2. Wissenschaftliche Resultate. Kreidel, Weisbaden.
Type locality: Philippines.
We primarily follow Puslednik et al. (2009), however, lymnaeid taxonomy is in urgent need of a comprehensive review.
Amongst aquatic vegetation in dams, ponds, billabongs, sluggish rivers and streams. Often seen with the foot uppermost floating on the surface of the water. Feeds on algae and detritus. Egg mass a crescent-shaped jelly strip containing many small eggs. Development direct.
Philippines and mainland Australia.
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Blair, D. & Finlayson, C. M. (1981). Observations on the habitat and biology of a lymnaeid snail, Austropeplea vinosa (Gastropoda: Pulmonata), an intermediate host of avian schistosomes in tropical Australia. Australian Journal of Marine and Freshwater Research 32: 757-767.
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