Children (11 direct children, 83 direct and indirect children):
Cephalaspis
(tree size 4)
Benneviaspidida
(tree size 2)
Cornuata
(tree size 25)
Dartmuthia
(tree size 2)
Tremataspis
(tree size 2)
Cephalaspidae
(tree size 21)
Atelaspidiformes
(tree size 2)
Thyestiida
(tree size 6)
Ateleaspis
(tree size 1)
Zenaspida
(tree size 3)
Benneviaspidiformes
(tree size 4)