Children (21 direct children, 48516 direct and indirect children):
Opisthobranchia
(tree size 8548)
Pulmonata
(tree size 4)
Cimidae
(tree size 68)
Nudipleura
(tree size 2)
Acteonellidae
(tree size 6)
Architectonicoidea
(tree size 405)
Dolomitellidae
Euthyneura
(tree size 38805)
Heterosubulitidae
Lower heterobranchia
(tree size 185)
Allogastropoda
Mathildoidea
(tree size 142)
Valvatoidea
(tree size 291)
Xylodisculidae
(tree size 11)
Ectobranchia
Murchisonelloidea
Triganglionata
Murchinsonelloidea
(tree size 15)
Orthonematidae
(tree size 13)
Architectonicacea
Cimoidea
Acteonelloidea