Children (7 direct children, 43 direct and indirect children):
Polybranchiaspiformes
(tree size 3)
Galeaspidiformes
(tree size 2)
Eugaleaspidiformes
(tree size 4)
Polybranchiaspidida
(tree size 26)
Hanyangaspidae
(tree size 1)
Xiushuiaspidae
Dayongaspidae