Family Idionychidae Tillyard and Fraser 1940 (dragonfly)
Parent taxon: Odonata according to A. Nel et al. 2005
Sister taxa: Anisoptera, Anisozygoptera, Antitaxineura, Epiproctophora, Heterothemis, Kobdoneura, Libellulina, Mesomantidiidae, Orthaeschnites, Oryctothemis, Peraphlebia, Perissophlebia, Proaeschna, Sogdothemis, Somatochlora, Syrrhoe, Triassophlebia, Trichocnemis, Zygoptera
Subtaxa: Mioidionyx
Ecology: fast-moving volant carnivore-insectivore