†family Pycnosteidae Tarlo 1962 (jawless fish)
Pteraspidomorpha - Psammosteiformes - Pycnosteidae
Parent taxon: Psammosteiformes according to S. V. Moloshnikov 2007
Sister taxa: none
Subtaxa: Tartuosteus
Ecology:
Distribution:
• Devonian of Belarus (1 collection), Estonia (4), Latvia (2), the Russian Federation (3)
Total: 10 collections including 13 occurrences