Pteraspidomorpha - Corvaspidiformes
Parent taxon: Heterostraci according to R. Van Der Laan 2019
Sister taxa: Amphiaspidiformes, Aporemaspis, Ariaspididae, Cardipeltida, Cardipeltidae, Cardipeltiformes, Ceraspidae, Corvaspidida, Cyathaspida, Cyathaspidiformes, Drepanaspidae, Guerichosteidae, Lepidaspidida, Lepidaspidiformes, Munchoaspis, Olbiaspidida, Palaeaspidi, Protaspidae, Psammolepis, Psammosteiformes, Pteraspidi, Pteraspidiformes, Rimasventeraspis, Strosipherus, Tesseraspidida, Tesseraspidiformes, Tolypelepidida, Tolypelepidiformes, Toombsaspis, Traquairaspidida, Traquairaspidiformes, Obliaspis, Dyreaspis, Pionaspis, Poriferaspis, Clydonaspis, Archodus, Anatolepsis, Kiangsuaspis, Pilolepsis, Ennosviaspis, Irregulariaspis, Listraspis, Karelosteus, Asketaspis, Alainaspis, Pycnaspis, Corveolepis, Grumantaspis, Steinaspis, Aspidosteus, Homaspidella, Allocryptaspis, Palaeodus, Strophisterus, Gunaspis, Yoglinia, Schizosteus, Athenaegis, Seretaspis
Subtaxa: Corvaspididae
Ecology:
Distribution:
• Devonian of Canada (5: Northwest Territories, Nunavut collections), Norway (10), the Russian Federation (2), Ukraine (2), the United Kingdom (1)
• Silurian of Canada (4: Nunavut), the United Kingdom (1)
Total: 25 collections including 27 occurrences