Bimuriidae
(tree size 4)
Sowerbyellidae
(tree size 26)
Leptellinidae
(tree size 19)
Leptestiidae
(tree size 8)
Plectambonitidae
(tree size 6)
Taffiidae
(tree size 4)
Aegiromenidae
(tree size 1)
Hesperomenidae
(tree size 10)
Grorudiidae
(tree size 1)
Syndielasmatidae
Allwynellidae
Alwynellidae
Xenambonitidae
(tree size 2)