Parent taxon: Arthrodira according to J. J. Sepkoski 2002
Sister taxa: Actinolepidoidei, Brachythoraci, Phylctaeniida, Phyllolepida, Africanaspis, Arctonema, Arenipiscis, Aspidichthys, Atlantidosteus, Belemnacanthus, Belosteus, Brachyosteus, Braunosteus, Bruntonichthys, Buchanosteus, Bullerichthys, Bungartius, Burrinijucosteus, Callognathus, Camuropiscis, Copanognathus, Cosmacanthus, Cyrtosteus, Deirosteus, Deveonema, Diplognathus, Eldenosteus, Errolosteus, Erromenosteus, Eskimaspis, Fallacosteus, Gemuendenaspis, Glyptaspis, Goodradigbeeon, Grazosteus, Groenlandaspis, Gyroplacosteus, Harrytoombsia, Holdenius, Hollardosteus, Hussakofia, Incisoscutum, Kendrickichthys, Kimberia, Kimberleyichthys, Kueichowlepis, Latocamurus, Laurentaspis, Leptosteus, Machaerognathus, Malerosteus, Mcnamaraspis, Megaloplax, Murmur, Operchallosteus, Overtonaspis, Oxyosteus, Parabelosteus, Parabuchanosteus, Paramylostoma, Pholidosteus, Platyaspis, Plourdosteus, Prescottaspis, Qataraspis, Rachiosteus, Rhenonema, Rolfosteus, Squamatognathus, Stuertzaspis, Synauchenia, Taemasosteus, Tafilalichthys, Tapinosteus, Taunaspis, Tiaraspis, Timanosteus, Toombsosteus, Torosteus, Trachosteus, Trematosteus, Tropidosteus, Tubonasus, Wheathillaspis, Williamsaspis, Yinosteus, Euarthrodira, Arctolepidae, Actinolepidae, Wuttagoonaspina, Dicksonosteus, Conchopoma, Coccosteus, Brachydeirus, Phlyctaenaspis, Chelyophorus, Titanichthys, Macropetalichthys, Heterosteus, Euantiarcha, Eubrachythoraci, Selenosteidae, Mylostoma
Subtaxa: none
Ecology: nektonic carnivore