1. Department of Paleontology, Geological Faculty, Saratov State University, 83 Astrakhanskaya Str., Saratov, 410012, Russia,
2. Institute of Geology and Petroleum Technology, Kazan Federal University, 4/5 Kremlevskaya Str., Kazan 420008, Russia
3. Brentwood Bay, British Columbia, V8M 1A4, Canada,
4. 204–26 Bastion Square, Victoria, British Columbia, V8W 1H9, Canada,