Children (8 direct children, 87 direct and indirect children):
Birgeriidae
(tree size 2)
Perleidiformes
(tree size 52)
Paratarrasius
(tree size 1)
Pholidopleuriformes
(tree size 6)
Ptycholepiformes
(tree size 9)
Tarrasiiformes
(tree size 4)
Luganoiiformes
(tree size 2)
Coccolepididae
(tree size 3)