Subfamily Epallaginae Needham 1903 (damselfly)
Insecta - Odonata - Euphaeidae
Parent taxon: Epallagidae according to S. B. Archibald et al. 2025
See also Nel et al. 2013
Sister taxa: Epallage, Epallagites, Euphaea, Euphaeinae, Indophaea
Subtaxa: Swauka
Ecology: fast-moving volant carnivore-insectivore
Distribution: found only at Swauk Pass (Eocene of Washington)