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By: Fikáček, Martin - Ryndevich, Sergey - Jia, FenglongType: ArticleIn: ZooKeysVolume: 214Series:Issue:Date: 2012Page Range: 13-27Publication Info: Pensoft Publishers 2012Subjects: China Hydrophilidae Morphology Nipponocercyon Oriental region Palaearctic region Sphaeridiinae taxonomy