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By: Radchenko, Alexander - Perkovsky, Evgeny E. - Vasilenko, DmitryType: ArticleIn: Journal of Hymenoptera ResearchVolume: 82Series:Issue:Date: 2021Page Range: 237--251Publication Info: Pensoft Publishers 2021Subjects: European ambers Formica ribbeckei new species Paleontology syninclusions taxonomy