Pteraspidomorpha - Amphiaspidiformes
Full reference: L. I. Novitskaya. 2008. Evolution of Taxonomic Diversity in Amphiaspids (Agnatha, Heterostraci: Amphiaspidiformes) and the Causes of Extinction in Ecologically Favorable Conditions. Paleontological Journal 42(2):181-191
Parent taxon: Heterostraci according to L. I. Novitskaya 2008
Sister taxa: Aporemaspis, Ariaspididae, Cardipeltida, Cardipeltidae, Cardipeltiformes, Ceraspidae, Corvaspidida, Corvaspidiformes, Cyathaspida, Cyathaspididae, Cyathaspidiformes, Drepanaspidae, Lepidaspidida, Lepidaspidiformes, Olbiaspidida, Palaeaspidi, Protaspidae, Psammolepis, Psammosteiformes, Pteraspidi, Pteraspidiformes, Strosipherus, Tesseraspidida, Tesseraspidiformes, Thelodontidae, Tolypelepidida, Tolypelepidiformes, Traquairaspidida, Traquairaspidiformes
Subtaxa: Putoranaspis
Ecology:
Distribution: found only at October Revolution Island [Pod'emnaya Fm] (Devonian of Russian Federation)