Pteraspidomorphi - Pteraspidomorphes
Parent taxon: Pteraspidomorphi according to J. J., Jr. Sepkoski 2002
Sister taxa: Aserotaspis, Coscinodus, Dipnoides, Furcacudiformes, Gompholepis, Gyropeltus, Palaeosteus, Pteraspidida, Pteraspidomorpha, Rabdacanthus, Sigurdia, Tylodus
Subtaxa: Alainaspis Allocryptaspis Anatolepsis Archodus Asketaspis Aspidosteus Athenaegis Clydonaspis Corveolepis Dyreaspis Ennosviaspis Grumantaspis Gunaspis Homaspidella Irregulariaspis Karelosteus Kiangsuaspis Listraspis Obliaspis Palaeodus Pilolepsis Pionaspis Poriferaspis Pycnaspis Schizosteus Seretaspis Steinaspis Strophisterus Yoglinia
Ecology:
Distribution:
• Devonian of Belarus (3 collections), Canada (11: British Columbia, Northwest Territories, Nunavut), the Czech Republic (1), Estonia (4), Latvia (6), the Russian Federation (6), United States (5: Idaho, Ohio, Utah, Wyoming)
• Silurian of Canada (10: Northwest Territories, Nunavut), China (1)
Total: 47 collections including 50 occurrences