Children (15 direct children, 1921 direct and indirect children):
Orthida
(tree size 116)
Spiriferida
(tree size 238)
Thecideida
(tree size 59)
Rhynchonellida
(tree size 369)
Terebratulida
(tree size 941)
Atrypida
(tree size 29)
Athyridida
(tree size 86)
Pentamerida
(tree size 61)
Dentatrypa
Tropidoleptidae
Cardiarinidae
Mongolellidae
Cadomelloidea
Spiriferinida
Protorthida
(tree size 7)