Children (9 direct children, 7413 direct and indirect children):
Leech
(tree size 322)
Hirudinea
Oligochaeta
(tree size 5100)
Branchiobdellida
(tree size 144)
Enchytraeida
(tree size 11)
Rhynchobdellida
(tree size 498)
Crassiclitellata
(tree size 1275)
Octochaetidae
(tree size 46)
Branchiobdellae
Capilloventrida
(tree size 8)