1. Asselian-Sakmarian Ammonoids of the Early Permian Shakh-Tau Reef (Bashkortostan)

   • T. B. Leonova

   OriginalPaper 29 January 2021 Pages: 1095 - 1112

   

2. Asselian-Sakmarian Nautiloids of the Shakh-Tau Reef (Bashkortostan)

   • T. B. Leonova
   • A. Yu. Shchedukhin

   OriginalPaper 29 January 2021 Pages: 1113 - 1134

   

3. Late Artinskian Nautiloids of the Shakh-Tau Reef (Bashkortostan)

   • A. Yu. Shchedukhin
   • T. B. Leonova

   OriginalPaper 29 January 2021 Pages: 1135 - 1151

   

4. Sakmarian Gastropods from the Samarskaya Luka (Lower Permian, Volga-Urals)

   • A. V. Mazaev

   OriginalPaper 29 January 2021 Pages: 1152 - 1177

   

5. New Data on Cisuralian Ammonoids of Pay-Khoy (Russian Arctic) from the Family Paragastrioceratidae Ruzhencev, 1951

   • K. V. Borissenkov

   OriginalPaper 29 January 2021 Pages: 1178 - 1188

   

6. Infrazonal Ammonite Biostratigraphy, Paleobiogeography and Evolution of Volgian Craspeditid Ammonites

   • M. A. Rogov

   OriginalPaper 29 January 2021 Pages: 1189 - 1219