Children (19 direct children, 2080 direct and indirect children):
Atelostomata
(tree size 1686)
Holectypoida
(tree size 69)
Oligopygoida
Echinoneoida
(tree size 93)
Neognathostomata
(tree size 156)
Gitolampadidae
(tree size 15)
Gitolampadids
Desorellidae
(tree size 4)
Galeropygidae
(tree size 9)
Menopygidae
(tree size 2)
Pygasteridae
(tree size 13)
Pygorhytidae
(tree size 12)
Astrolampas
Hyboclypus
(tree size 2)
Atlasaster
Grasia
Mesodiadema
Aulacopygus
Pyrinodia
Echinopygus