MIDDLE CAMBRIAN LINGULATE BRACHIOPODS FROM THE TARBAGATAY RANGE, KAZAKHSTAN

Early Middle Cambrian (Amgian) lingulate brachiopods from the Tarbagat ay Range in eastern Kazakhstan represent mostly endemic taxa, which ma y suggest that the Tarbagatay Range was relatively isolated from adjac ent terranes during that time; only Kleithrlatreta indicate similarity with the Australian part of Gondwana, as well as with the south and c entral Kazakhstanian terranes. Late Middle Cambrian (Mayan) taxa from the same area are mostly cosmopolitan. Kostjubella relaxata gen, et sp . n., Prototreta (?) dolosa sp. n. and Stilpnotreta galinae sp, n. are proposed.