Children (19 direct children, 933 direct and indirect children):
Ophiuridae
(tree size 588)
Ophiomycetidae
Aplocomidae
(tree size 9)
Ophiolepidina
(tree size 142)
Hemieuryalina
Ophiopyrgidae
(tree size 143)
Astrophiuridae
(tree size 29)
Acroura
Ophiaulax
Ophiaulaxoides
Ophioaster
Ophiohybris
Ophiolancea
Ophioma
Ophiotrapezium
Ophiotrigonum
Ophiuricoma
(tree size 1)
Protaster
Ophiogojira
(tree size 2)