Artinskian-Kungurian (Early Permian) brachiopod faunas from the Tarim Basin, northwest China. Part 2: Paleobiogeography, and systematics of Orthotetida, Orthida, Spiriferida, Spiriferinida, Rhynchonellida, Athyridida and Terebratulida. Palaeontographica Abteilung A Palaeozoologie-Stratigraphie, 275(1-3), May 2006: 1-53. 29 [Zoological Record Volume 142]