1. A.N. Severtsov Institute of Ecology and Evolution, Leninsky Prospect 33, Moscow 119071 Russia
2. Senckenberg Research Institute and Natural History Museum, Research Station of Quaternary Palaeontology, Am Jakobskirchhof 4, Weimar 99423 Germany
3. Academy of Sciences of Sakha (Yakutia) Republic, Prospect Lenina 33, Yakutsk 677007, Sakha (Yakutia) Republic, Russia
4. Diamond and Precious Metal Geology Institute, Siberian Branch of Russian Academy of Sciences, Prospect Lenina 39, Yakutsk 677000, Sakha (Yakutia) Republic, Russia