†superorder Polybranchiaspidida Zhu and Gai 2007 (vertebrate)
Galeaspida - Polybranchiaspidida
Full reference: M. Zhu and Z.-K. Gai. 2007. Phylogenetic relationships of Galeaspids (Agnatha). Frontiers of Biology in China 2(2):151-169
Parent taxon: Galeaspida according to M. Zhu and Z.-K. Gai 2007
Sister taxa: Dayongaspidae, Diploholcaspis, Eugaleaspidiformes, Hanyangaspidae, Hyperaspis, Microphymaspis, Pseudoduyunaspis, Xiushuiaspidae
Subtaxa: Geraspididae Huananaspidiformes Polybranchiaspidiformes Zhaotongaspididae
Ecology: