Children (11 direct children, 225 direct and indirect children):
Praodellidae
(tree size 5)
Praobdellidae
Cylicobdellidae
(tree size 11)
Erpobdellidae
(tree size 88)
Hirudiniformes
(tree size 85)
Erpobdelliformes
Salifidae
(tree size 10)
Orobdellidae
(tree size 11)
Gastrostomobdellidae
(tree size 2)
Americobdellidae
(tree size 2)
Gnathobdellidae
Hirudidae