Middle Cambrian lingulate brachiopods from Tarbagatay Range, Kazakhstan

Early Middle Cambrian (Amgian) lingulate brachiopods from the TarbagatayRange in eastern Kazakhstan represent mosfly endemic taxa, which may suggestthat the Tarbagatay Range was relatively isolated from adjacent terranes duringthat time; oriy Kl.eithriatreta indicate similarity with the Australian part of Gondwana,as well as v{rith the south and central Kazakhstanian terranes. Late MiddleCambrian {Mayan) taxa from the same area are mostly cosmopolitan' Kostjubellarelnxata gen. et sp. n., Prototreta(?) doLosa sp. n. and Stilpnatreta galinae sp. n.are proposed.