†family Istiodactylidae Howse et al. 2001 (pterosaur)
Parent taxon: Pteranodontoidea according to B. Andres and Q. Ji 2006
Sister taxa: Aussiedraco, Guidraco
Subtaxa: Archaeoistiodactylus, Hongshanopterus, Istiodactylus, Liaoxipterus, Nurhachius
Ecology: volant piscivore