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