1. New Genus and Species of Lymexylidae (Coleoptera) from Baltic Amber

   • V. Y. Nazarenko
   • E. E. Perkovsky
   • D. V. Vasilenko

   OriginalPaper 01 March 2021 Pages: 1395 - 1399

   

2. Mesozoic Gall Midges (Diptera, Cecidomyioidea) with a Description of a New Genus and Species from the Santonian Amber of Taimyr (Ugolyak)

   • Z. A. Fedotova
   • E. E. Perkovsky

   OriginalPaper 01 March 2021 Pages: 1400 - 1409

   

3. Sexual Dimorphism in the Postcranial Skeleton of Dinosaurs

   • V. S. Tereshchenko

   OriginalPaper 01 March 2021 Pages: 1410 - 1433

   

4. Evolution of Red Blood Cells in Extant and Extinct Tetrapods

   • I. Udroiu

   OriginalPaper 01 March 2021 Pages: 1434 - 1442

   

5. Revision of the Genera Spinodeflandrella Kozur, 1981, Holdsworthella Kozur, 1981 and Haplodiacanthus Nazarov et Rudenko, 1981 (Early Permian Radiolarians of the Order Albaillellaria) in the South Urals, Russia

   • M. S. Afanasieva

   OriginalPaper 01 March 2021 Pages: 1443 - 1455