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Sienkiewicz, P. and Lipa, J. 2010. Clitellocephalus ophoni (Tuzet et Ormières, 1956) (Apicomplexa: Eugregarinida: Gregarinidae) recorded in Poland on strawberry seed beetle Harpalus(Ophonus) rufipes (De Geer, 1774) (Coleoptera: Carabidae). Biological Letters. 46, 1 (Jul. 2010), 43–50. DOI:https://doi.org/10.2478/v10120-009-0013-1.