Spangler, Paul J. 1996. "Four New Stygobiontic Beetles (Coleoptera: Dytiscidae; Noteridae; Elmidae)." Insecta Mundi, 10-num-1-4) 241–260.
A list of the American water beetles of tribe Bidessini (Dytiscidae-Hydroporinae). Type-species are listed for each genus with references to the original designations.
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