Vol. 55, No. 3, 2021
Representatives of the Genus Parrelloides (Foraminifera) from the Upper Cretaceous of West Siberia
p. 235 abstract
Radiolarians of the Class Stauraxonaria from the Late Carboniferous–Middle Permian: Nazarovispongus Kozur sensu Kozur et Mostler, restituo et emend. nov. and a New Genus Kozurispongus gen. nov.
p. 244 abstract
Permian Bivalves of the Pronchishchev Ridge (North Siberia): New Data on Taxonomic Composition, Biostratigraphy, and Biogeographic Relationships
p. 259 abstract
Redescription of Chama clavaticostata Klushnikov (Bivalvia) from the Middle Eocene of Ukraine
p. 272 abstract
On the Zonal Index-Species of the Standard Scale of the Ryazanian Stage on the Russian Platform
p. 277 abstract
New and Little Known Blattinopsidae (Insecta: Blattinopsida) from the Middle Permian of Russia
p. 288 abstract
Periplaneta (?) perialla sp. nov., a Cockroach Larva of the Subfamily Blattinae (Dictyoptera, Blattidae) from Rovno Amber
p. 294 abstract
A New Phoebodontid Shark from the Devonian of the Urals and the Distribution of Phoebodus Species
p. 301 abstract
Age Variability in the Histological Structure of the Postcranial Skeleton of Platyoposaurus stuckenbergi Trautschold, 1884 (Temnospondyli, Archegosauridae) from the Middle Permian of Eastern Europe
p. 311 abstract
A Revision of the Palaeocene–Eocene Mongolian Presbyornithidae (Aves: Anseriformes)
p. 323 abstract
Small Vertebrates from the Pleistocene Sediments of the East Chamber of Denisova Cave, Northwestern Altai Mountains
p. 331 abstract
Banded Iron Formations (Jaspilites): The Paleontologist’s View
p. 343 abstract