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By: Majka, ChristopherType: ArticleIn: ZooKeysVolume: 2Series:Issue:Date: 2008Page Range: 239-260Publication Info: Pensoft Publishers 2008Subjects: Aquatic invertebrates Biodiversity Canada Coleoptera Dryopidae Dytiscidae Elmidae Gyrinidae Haliplidae Heteroceridae Hydrophilidae Nomenclature Prince Edward Island