Cees Gielis is a Dutch entomologist and researcher of biodiversity, specializing in Lepidoptera, at the Naturalis Biodiversity Center in Leiden, Netherlands.
[1] As of March 2019, Gielis authored 378 taxa within the family of Pterophoridae and 19 within the family of Alucitidae.
[2] See Wikispecies below.
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