Pteraspidomorphi - Pteraspidomorphes
Parent taxon: Pteraspidomorphi according to J. J., Jr. Sepkoski 2002
Sister taxa: Aserotaspis, Coscinodus, Dipnoides, Furcacudiformes, Gompholepis, Gyropeltus, Neeyambaspis, Palaeosteus, Pituriaspis, Pteraspidida, Pteraspidomorpha, Rabdacanthus, Sigurdia, Superciliaspis, Tylodus
Subtaxa: Alainaspis Allocryptaspis Anatolepsis Archodus Asketaspis Aspidosteus Athenaegis Clydonaspis Corveolepis Dyreaspis Empedaspis Ennosviaspis Grumantaspis Gunaspis Homaspidella Irregulariaspis Karelosteus Kiangsuaspis Liliaspis Listraspis Nahanniaspis Obliaspis Palaeodus Pelaspis Pilolepsis Pionaspis Poriferaspis Pycnaspis Sanidaspis Schizosteus Seretaspis Steinaspis Strophisterus Tareyaspis Yoglinia
Ecology:
Distribution:
• Devonian of Belarus (3 collections), Estonia (2), Latvia (6), the Russian Federation (5), United States (2: Ohio, Wyoming)
• Silurian of Canada (3: Northwest Territories, Nunavut), China (1)
Total: 22 collections including 23 occurrences