Children (9 direct children, 126 direct and indirect children):
Tryblidiida
(tree size 75)
Pelagiellida
(tree size 25)
Maikhanellidae
(tree size 15)
Palaeacmaeidae
(tree size 2)
Sinuitopsida
Multifariida
Cyrtolitiones
Cyrtonelliones
Eomonoplacophora