SILICIFIED LATE CAMBRIAN BRACHIOPODS FROM THE GEORGINA BASIN, WESTERNQUEENSLAND

Two species of brachiopod are recorded from the Upper Cambrian Chatswo rth Limestone of western Queensland. Kozhuchinella, previously only kn own from supposed Upper Tremadoc rocks of southwest Siberia, is docume nted for the first time from Australia as Kozhuchinella cf. mariinica Severgina, 1967. This species exhibits digitate ventral and dorsal man tle canal systems, the latter unusual in possessing blind vascula myar ia. The musculature and mantle canal systems indicate that the species belongs to the Billingsellidae and not the Plectambonitoidea as origi nally suggested by Severgina. Also documented is a new genus, Radkeina (type species R. taylori sp. nov.), tentatively assigned to the Famil y Huenellidae.