Order Birkeniida Berg 1937 (vertebrate)
Parent taxon: Anaspida according to J. A. Long 2011
Sister taxa: Anaspidiformes, Birkeniidae, Conopiscius, Jamoytiiformes, Jamoytius, Rhyncholepis
Subtaxa: Cowielepis Pharyngolepididae
Ecology:
Distribution:
• Silurian of Estonia (2 collections), Norway (2), the United Kingdom (2)
Total: 6 collections including 8 occurrences