†subfamily Cyathaspidinae Denison 1964 (jawless fish)
Pteraspidomorpha - Cyathaspidiformes - Cyathaspididae
Parent taxon: Cyathaspididae according to D. K. Elliott 2013
Sister taxa: Alainaspis, Anglaspidinae, Archegonaspis, Boothiaspidinae, Cyathaspis, Dikenaspis, Eoarchegonaspis, Faberaspis, Homalaspidella, Irregulareaspidinae, Pionaspis, Poraspidinae, Ptomaspis, Sanidaspis, Tolypelepidinae, Vernonaspis
Subtaxa: Capitaspis
Ecology: planktonic suspension feeder
Distribution: found only at 11 km southeast of Cape Anne, Somerset Island (Silurian of Nunavut)