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, Psammolepis, Psammosteiformes, Pteraspidi, Pteraspidiformes, Rimasventeraspis, Strosipherus, Tesseraspidida, Tesseraspidiformes, Tolypelepidiformes, Toombsaspis, Traquairaspidida, Traquairaspidiformes, Kiangsuaspis, Grumantaspis, Listraspis, Athenaegis, Poriferaspis, Dyreaspis, Clydonaspis, Strophisterus, Steinaspis, Gunaspis, Pycnaspis, Pionaspis, Anatolepsis, Asketaspis, Alainaspis, Schizosteus, Allocryptaspis, Corveolepis, Pilolepsis, Irregulariaspis, Obliaspis, Seretaspis, Archodus, Karelosteus, Homaspidella, Ennosviaspis, Yoglinia
Subtaxa: none
Ecology:
Distribution: there are no occurrences of Tolypelepidida in the database