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New Black Fungus Gnats (Diptera, Sciaridae) of North America. Part III. Genera Camptochaeta Hippa & Vilkamaa, Claustropyga Hippa, Vilkamaa & Mohrig and Dichopygina Vilkamaa, Hippa & Komarova

. Zootaxa. 4258, 4 (May 2017), 301–326. DOI:https://doi.org/10.11646/zootaxa.4258.4.1.