Pteraspidomorpha - Tolypelepidida
Parent taxon: Heterostraci according to J. S. Nelson et al. 2016
See also Long 2011
Sister taxa: Amphiaspidiformes, Aporemaspis, Ariaspididae, Aserotaspis, Cardipeltida, Cardipeltidae, Cardipeltiformes, Ceraspidae, Corvaspidida, Corvaspidiformes, Cyathaspida, Cyathaspidiformes, Drepanaspidae, Guerichosteidae, Lepidaspidida, Lepidaspidiformes, Munchoaspis, Olbiaspidida, Palaeaspidi, Protaspidae, Psammolepis, Psammosteiformes, Pteraspidi, Pteraspidiformes, Rimasventeraspis, Strosipherus, Tesseraspidida, Tesseraspidiformes, Tolypelepidiformes, Toombsaspis, Traquairaspidida, Traquairaspidiformes, Karelosteus, Aspidosteus, Pycnaspis, Anatolepsis, Allocryptaspis, Homaspidella, Pilolepsis, Yoglinia, Palaeodus, Listraspis, Alainaspis, Athenaegis, Archodus, Gunaspis, Irregulariaspis, Clydonaspis, Ennosviaspis, Pionaspis, Grumantaspis, Asketaspis, Corveolepis, Poriferaspis, Steinaspis, Schizosteus, Dyreaspis, Kiangsuaspis, Obliaspis, Strophisterus, Seretaspis
Subtaxa: none
Ecology:
Distribution: there are no occurrences of Tolypelepidida in the database