1. Aleja Najświętszej Maryi Panny 20/20A 42-200 Częstochowa Poland
2. Department of Organismal Biology; Evolutionary Biology Centre; Uppsala University; Norbyvägen 18A 752 36 Uppsala Sweden
3. Institute of Paleobiology; Polish Academy of Sciences; Twarda 51/55 00-818 Warsaw Poland
4. Borissiak Paleontological Institute; Russian Academy of Sciences; Profsoyuznaya 123 Moscow 117997 Russia
5. Kazan Federal University; Kremlyovskaya 18 420008 Kazan Russia