†family Protopteraspididae Novitskaya 1983 (jawless fish)
Pteraspidomorpha - Pteraspidiformes - Protopteraspididae
Parent taxon: Pteraspidiformes according to E. Randle and R. S. Sansom 2017
See also Blieck 1984, Blieck et al. 2002 and Nelson et al. 2016
Sister taxa: Anchipteraspididae, Pteraspididae, Pteraspidoidei
Subtaxa: Canadapteraspis Escharaspis Gigantaspis Loricopteraspis Miltaspis Protopteraspis Stegobranchiaspis Zascinaspis
Ecology:
Distribution:
• Devonian of Canada (1: Nova Scotia collection), France (1), Norway (1), the Russian Federation (3), United States (1: Ohio)
Total: 7 collections including 10 occurrences