the second stage from the bottom in the lower series of the Permian system. It was identified by the Soviet geologist V. E. Ruzhentsev in 1936. After the lower part of the Sakmarian stage was identified and named the Asselian stage (Ruzhentsev, 1954), the scope of the Sakmarian was somewhat reduced in comparison to the initial proposal.
The Sakmarian stage is characterized primarily by the presence of ammonoids (including the genera Synartinskia, Preshumardites, and Propopanoceras) and fusulinids. Beds of the Sakmarian stage are found on the Eastern European Platform, on the western slopes of the Urals, and in Middle Asia. They are also found in Western Europe (the Carnic Alps), North America, and Western Australia.