1. Evolution & Diversity Dynamics Lab, Université de Liège , 14 Allée du 6 Août, Liège 4000 , Belgium
2. Department of Earth Sciences, University of Oxford , South Parks Road, Oxford OX1 3AN , UK
3. Geological Institute of the Russian Academy of Sciences , Pyzhevsky Lane 7, Moscow 119017 , Russia
4. Department of General Geology and Minerals, Saratov State University , A83 Astrakhanskaya Street, 410012 Saratov , Russia
5. Department of Oil and Gas, Saratov State Technical University , 77 Politekhnicheskaya Street, 410054 Saratov , Russia
6. Undory Paleontological Museum, Shkol’naya Ulitsa , 5 Undory, Ulyanovsk Oblast, 433340 , Russia
7. Natural Science Museum, Ulyanovsk State University , Leo Tolstoy Street, Ulyanovsk 432000 , Russia
8. A.N. Severtsov Institute of Ecology and Evolution of the Russian Academy of Sciences , 34 Vavilova Street, Moscow 119334 , Russia