Children (10 direct children, 106 direct and indirect children):
Spiriferoidea
(tree size 30)
Ambocoelioidea
(tree size 15)
Martinioidea
(tree size 16)
Paeckelmanelloidea
(tree size 7)
Cyrtospiriferoidea
(tree size 3)
Cyrtioidea
(tree size 9)
Adolfioidea
(tree size 6)
Brachythyridoidea
(tree size 2)
Theodossioidea
(tree size 8)
Delthyridacea