title: Permian Ammonoids: Results and Prospects of Research in Russia and Other Post-Soviet States
abstract: The paper aims to introduce the history of Russian and Soviet study of Permian ammonoids, from the middle of the 19th century to the present, to a wider audience of geologists, and particularly to a younger generation of students and researchers. Permian ammonoids played the leading role in the substantiation of all stages of the lower series of the Permian (Cisuralian). The Artinskian Stage was first established in the late 19th century by A.P. Karpinsky, the Sakmarian Stage in 1938, and the As
journal: Učënye zapiski Kazanskogo universiteta. Seriâ  Estestvennye nauki/Učënye zapiski Kazanskogo universiteta. Seriâ Estestvennye nauki/Učenye zapiski Kazanskogo gosudarstvennogo universiteta. Seriâ Estestvennye nauki