People Pyotr Petrovich Semenov-Tjan-Schanskij peoplepill id: pyotr-petrovich-semenov-tjan-schanskijPPS 5 views today 12 views this weekPyotr Petrovich Semenov-Tjan-SchanskijBiographyListsAlso ViewedListsPyotr Petrovich Semenov-Tjan-Schanskij is in following listsBy field of workNotable biologistsBy work and/or countryNotable ZoologistsNotable EntomologistsFrom our partnersSponsoredPyotr Petrovich Semenov-Tjan-Schanskij