More globose, and with a lower spire and larger aperture than B. cosmeta. Some specimens are rather abalone-like in shape.
Bayardella johni Burch, 1977
Class Gastropoda
Infraclass Heterobranchia
Megaorder Hygrophila
Order Lymnaeida
Superfamily Planorboidea
Family Planorbidae
Subfamily: Miratestinae
Genus Bayardella Burch, 1977
Original name: Plesiophysa (Bayardella) johni Burch,1977. In Burch, J.B. (1977). A new freshwater snail (Basommatophora: Planorbidae) from Australia, Plesiophysa (Bayardella) johni. Malacological Review 10: 79-80.
Type locality: Isdell River, Walcott Inlet, Western Australia.
Under stones, in streams and waterholes; biology otherwise unstudied.
Gulf of Carpentaria, Timor Sea and Indian Ocean divisions of Western Australia, Northern Territory and far western Queensland.
Beesley, P. L., Ross, G. J. B. & Wells, A., Eds. (1998). Mollusca: The Southern Synthesis. Parts A & B. Melbourne, CSIRO Publishing.
Burch, J. B. (1977). A new freshwater snail (Basommatophora : Planorbidae) from Australia, Plesiophysa (Bayardella) johni. Malacological Review 10: 79-80.
Köhler, F., Kessner, V. & Whisson, C. (2012). New records of non-marine, non-camaenid gastropods (Mollusca: Gastropoda) from islands off the Kimberley coast, Western Australia. Records of the Western Australian Museum 27: 21-39.
Walker, J. C. (1988). Classification of Australian buliniform planorbids (Mollusca: Pulmonata). Records of the Australian Museum 40: 61-89.
Willan, E. C. & Kessner, V. (2021). A conspectus of the freshwater molluscs of the Daly River catchment, Northern Territory. Northern Territory Naturalist 30: 108-137.
