Helen’s twins in the Balkans: discovery of two new Paraptychoptera Tonnoir, 1919 species closely related to P. helena Peus, 1958, with systematic revision of the “lacustris” group (Diptera, Ptychopteridae)


	Habitat of Ptychoptera pollux sp. nov., north Macedonia, Novo Selo village, Mavrovo lake outflow.

Part of: Keresztes L, Kappert J, Henning M, Török E (2021) Helen’s twins in the Balkans: discovery of two new Paraptychoptera Tonnoir, 1919 species closely related to P. helena Peus, 1958, with systematic revision of the “lacustris” group (Diptera, Ptychopteridae). ZooKeys 1071: 63-81. https://doi.org/10.3897/zookeys.1071.58598