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, Cyathaspidiformes, Drepanaspidae, Guerichosteidae, Lepidaspidida, Lepidaspidiformes, Munchoaspis, Olbiaspidida, Palaeaspidi, Protaspidae, Psammolepis, Psammosteiformes, Pteraspidi, Pteraspidiformes, Rimasventeraspis, Strosipherus, Tesseraspidida, Tesseraspidiformes, Thelodontidae, Tolypelepidida, Tolypelepidiformes, Toombsaspis, Traquairaspidida, Traquairaspidiformes
Subtaxa: Amphiaspidoidei Putoranaspis
Ecology:
Distribution:
• Devonian of the Russian Federation (7 collections)
Total: 7 collections including 23 occurrences