†order Guildayichthyiformes Lund 2000 (ray-finned fish)
Osteichthyes - Guildayichthyiformes
Full reference: R. Lund. 2000. The new Actinopterygian order Guildayichthyiformes from the Lower Carboniferous of Montana (USA). Geodiversitas 22(2):171-206
Parent taxon: Actinopterygii according to R. van der Laan 2019
See also Long 2011, Lund 2000, Nelson 2006 and Nelson et al. 2016
Sister taxa: none
Subtaxa: none
Ecology: planktonic suspension feeder
Distribution: found only at Posidonia Member, Bearsden locality (Carboniferous of the United Kingdom)