1. Introduction

   • S. V. Rozhnov

   Announcement 17 December 2017 Pages: 575 - 575

2. Russia–UK Collaboration in Paleontology: Past, Present, and Future

   • M. J. Benton
   • D. E. G. Briggs
   • S. T. Turvey

   OriginalPaper 17 December 2017 Pages: 576 - 599

3. Sequence of Permian Tetrapod Faunas of Eastern Europe and the Permian–Triassic Ecological Crisis

   • A. G. Sennikov
   • V. K. Golubev

   OriginalPaper 17 December 2017 Pages: 600 - 611

4. Early Stages of Recovery of the East European Tetrapod Fauna after the End-Permian Crisis

   • M. A. Shishkin
   • I. V. Novikov

   OriginalPaper 17 December 2017 Pages: 612 - 622

5. Terrestrial Ecology around the Permian–Triassic Boundary

   • A. G. Ponomarenko

   OriginalPaper 17 December 2017 Pages: 623 - 627

6. Early Cretaceous Enantiornithine Birds (Aves, Ornithothoraces) and Establishment of the Ornithuromorpha Morphological Type

   • N. V. Zelenkov

   OriginalPaper 17 December 2017 Pages: 628 - 642

7. Ordovician Paracrinoids from the Baltic: Key Problems of Comparative Morphology of Pelmatozoan Echinoderms

   • S. V. Rozhnov

   OriginalPaper 17 December 2017 Pages: 643 - 662

8. Origin and the Early Evolution of the Phylum Mollusca

   • P. Yu. Parkhaev

   OriginalPaper 17 December 2017 Pages: 663 - 686