Ptychoptera castor sp. nov. a flagellum of antennae b right wing c epandrium, dorsal d subapical lobe of epandrium, ventral e left gonocoxite with gonocoxite lobes f anterior and medial lobules, details g hypandrium, caudal h paramere, ventral i aedeagal complex, dorsal.

  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.