†family Dayongaspidae Pan and Zeng 1985 (vertebrate)
Parent taxon: Galeaspida according to M. Zhu and Z.-K. Gai 2007
Sister taxa: Diploholcaspis, Eugaleaspidiformes, Hanyangaspidae, Hyperaspis, Microphymaspis, Polybranchiaspidida, Pseudoduyunaspis, Xiushuiaspidae
Subtaxa: Dayongaspis Platycaraspis
Ecology:
Distribution: found only at Dayong, Rongxi Fm (Silurian of China)