Children (12 direct children, 2208 direct and indirect children):
Typhloplanoida
(tree size 432)
Dalyellioida
(tree size 609)
Kalyptorhynchia
(tree size 1001)
Dalytyphloplanida
(tree size 140)
Elvertia
(tree size 1)
Acrumenidae
(tree size 2)
Psammorhynchidae
(tree size 4)
Acholadidae
(tree size 2)
Dalyelliida
Typhloplanida
Hyperhynchus
(tree size 1)
Actinodactylellidae
(tree size 4)