Children (10 direct children, 182 direct and indirect children):
Heterostraci
(tree size 146)
Pteraspidomorphes
(tree size 3)
Arandaspida
(tree size 7)
Palaeospondylus
Astraspida
(tree size 15)
Anatolepis
Arandaspidida
Heterostracomorphi
(tree size 1)
Furcacudiformes
Pteraspidida