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Wetzel, M.J. & Reynolds, J.W. 2012. The Earthworms (Annelida, Clitellata, Oligochaeta) of Illinois: Introduction and Annotated Checklist of Species: Families Acanthodrilidae, Glossoscolecidae, Komarekionidae, Lumbricidae, Megascolecidae, and Sparganophilidae, 21 Feb 2013. ≡