Children (15 direct children, 1179970 direct and indirect children):
Ephemeroptera
(tree size 4296)
The mayflies
Palaeoptera
(tree size 8251)
Metapterygota
(tree size 1167244)
Palaeodictyopteroidea
(tree size 122)
Coleopteroidea
Mecopterodea
Geraridea
Syntonopterida
Hypoperlidea
Reculida
(tree size 42)
Tshekarcephalidae
Permoneuridae
Tshekarchiereidae
Hebeigrammidae
Montanuraliidae