Pteraspidomorpha - Cyathaspidiformes - Cyathaspididae
Alternative spelling: Tolypelepididae
Parent taxon: Cyathaspididae according to K. L. Soehn and M. V. H. Wilson 1990
See also Sallan et al. 2018 and van der Laan 2019
Sister taxa: Alainaspis, Anglaspidinae, Archegonaspis, Boothiaspidinae, Cyathaspidinae, Cyathaspis, Dikenaspis, Eoarchegonaspis, Faberaspis, Homalaspidella, Irregulareaspidinae, Pionaspis, Poraspidinae, Ptomaspis, Sanidaspis, Vernonaspis
Subtaxa: Asketaspis Athenaegis Tolypelepis
Type: Tolypelepis
Distribution:
• Devonian of Canada (1: Northwest Territories collection)
• Silurian of Canada (4: Northwest Territories, Nunavut), Estonia (3), Poland (1), the Russian Federation (2)
Total: 11 collections each including a single occurrence