Velesunio  Velesunio is a genus of medium to large sized mussels in the family Hyriidae. "Velesunio" are found on mainland Australia and Tasmania. "Velesunio" also occur in Papua New Guinea. Lives with two thirds of their shell buried in the sediment (making them infaunal) in rivers, streams, lakes, billabongs and water catchment dams. A list of species included in the genus of "Velesunio": Note:   Species of "Velesunio" may appear very similar in appearance to those of "Alathyria, Hyridella, Cucumerunio" and "Westralunio." The type species for this genus is "Unio balonnensis" Conrad, 1850 collected from the Balonne River, New South Wales.