Family Idionychidae Tillyard and Fraser 1940 (true dragonfly)
Insecta - Odonata - Idionychidae
Parent taxon: Libelluloidea according to A. Goodman et al. 2026
See also Nel et al. 2005
Sister taxa: Condalia, Cordulephyidae, Corduliidae, Gomphomacromiidae, Libellula cassandra, Libellula ceres, Libellulidae, Macromiidae, Neophyidae, Synthemistidae
Subtaxa: Mioidionyx
Ecology: fast-moving volant carnivore-insectivore
Distribution: found only at Vishnevaya Balka creek (Miocene of Russian Federation)