†suborder Psammosteoidei (jawless fish)
Pteraspidomorpha - Pteraspidiformes
Parent taxon: Pteraspidiformes according to R. van der Laan 2019
Sister taxa: Anchipteraspididae, Dnestraspis, Podolaspinae, Protaspidae, Protopteraspididae, Pteraspididae, Pteraspidoidei
Subtaxa: Obrucheviidae
Ecology: planktonic suspension feeder
Distribution:
• Devonian of Belarus (4 collections), Canada (1: Nunavut), the Russian Federation (1)
Total: 6 collections each including a single occurrence