Family Idionychidae Tillyard and Fraser 1940 (dragonfly)
Insecta - Odonata - Idionychidae
Parent taxon: Odonata according to A. Nel et al. 2005
Sister taxa: Anisozygoptera, Epiproctophora, Hageniella, Hageniella problematica, Haidilaozhenidae, Kobdoneura, Liassophlebia clavigaster, Liassophlebia hopei, Libellula decapitata, Libellulina, Mesomantidiidae, Mesonetopsis, Orthaeschnites, Oryctothemis, Palaeophlebia, Peraphlebia, Proaeschna, Pseudoeuphaea, Pseudoeuphaea areolata, Pseudoeuphaea falsificata, Pseudoeuphaea filosa, Pseudoeuphaea obscura, Sogdothemis, Syrrhoe, Triassophlebia, Zygoptera
Subtaxa: Mioidionyx
Ecology: fast-moving volant carnivore-insectivore
Distribution: found only at Vishnevaya Balka creek (Miocene of Russian Federation)