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)