†order Astraspidiformes Berg 1940 (jawless fish)
Pteraspidomorpha - Astraspidiformes
Parent taxon: Astraspida according to G. P. Wilson et al. 2016
Sister taxon: Astrapidiformes
Subtaxa: none
Ecology:
Distribution:
• Silurian of the Russian Federation (1 collection)
• Ordovician of Canada (2: Ontario), United States (3: Colorado, Wyoming)
Total: 6 collections each including a single occurrence