†order Guidayichthyiformes Lund 2000 (ray-finned fish)
Osteichthyes - Guidayichthyiformes
Full reference: R. Lund. 2000. The new Actinopterygian order Guildayichthyiformes from the Lower Carboniferous of Montana (USA). Geodiversitas 22(2):171-206
Parent taxon: Chondrostei according to J. A. Long 2011
Sister taxa: Acipenseriformes, Asterodontidae, Cheirolepiformes, Chondrosteiformes, Dictyopygidae, Diphyodontidae, Neochallaia, Polyodonti, Sturii
Subtaxa: none
Ecology: planktonic suspension feeder
Distribution: there are no occurrences of Guidayichthyiformes in the database