Children (6 direct children, 178 direct and indirect children):
Deltoptychiidae
(tree size 2)
Chimaeroidei
(tree size 152)
Edaphodontidae
(tree size 7)
Squalorajoidei
(tree size 3)
Myriacanthidae
(tree size 6)
Callorhynchidae
(tree size 2)