The monograph contains descriptions of clymeniids from the Famennian of the Urals and Kazakhstan, and descriptions and biostratigraphic review of major Famennian ammonoid localities in Russia and Kazakhstan. General aspects of Famennian ammonoid biostratigraphy are discussed. Clymeniid systematics is discussed and a classification of the suborder Clymeniina is proposed. Diagnoses and composition of all presently known Clymeniina genera, families and higher taxa are presented. Five families, five subfamilies, 33 genera, and 73 species of Clymeniina are described; of these 46 species are new. The book contains 32 plates, 1 table, 78 text-figures.