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, Aserotaspis, Cardipeltida, Cardipeltidae, Cardipeltiformes, Ceraspidae, Corvaspidida, Corvaspidiformes, Cyathaspida, Cyathaspidiformes, Drepanaspidae, Guerichosteidae, Lepidaspidida, Lepidaspidiformes, Munchoaspis, Olbiaspidida, Palaeaspidi, Psammolepis, Psammosteiformes, Pteraspidi, Pteraspidiformes, Rimasventeraspis, Strosipherus, Tesseraspidida, Tesseraspidiformes, Tolypelepidida, Tolypelepidiformes, Toombsaspis, Traquairaspidida, Traquairaspidiformes, Steinaspis, Poriferaspis, Pycnaspis, Corveolepis, Strophisterus, Clydonaspis, Ennosviaspis, Kiangsuaspis, Athenaegis, Seretaspis, Dyreaspis, Grumantaspis, Allocryptaspis, Pilolepsis, Karelosteus, Gunaspis, Pionaspis, Alainaspis, Homaspidella, Yoglinia, Anatolepsis, Obliaspis, Irregulariaspis, Schizosteus, Asketaspis, Listraspis, Archodus
Subtaxa: Putoranaspis
Ecology:
Distribution:
• Devonian of the Russian Federation (4 collections)
Total: 4 collections including 6 occurrences