New Species of Trepostomata (Bryozoa) From the Lower Permian Callytharra Formation, Western Australia

Bryozoans represent a dominant faunal element in the Lower Permian of Western Australia. Here, three new trepostome species are described from the Callytharra Formation (Sakmarian – Artinskian): Nikiforopora haigi sp. nov., Iraidina dendroidea sp. nov., and I. multicava sp. nov. The genera Nikiforopora and Iraidina were previously unknown from the Permian deposits of Australia. The genera have no contemporary equivalents from other areas, so their use for stratigraphic correlation and palaeobiogeography remains limited. Intensive studies of the Permian Bryozoa from Australia appear necessary to better understand the Gondwanan distributions of the genera and species.