Children (13 direct children, 56 direct and indirect children):
Urocerus
(tree size 13)
Sirex
(tree size 16)
Tremex
(tree size 4)
Xeris
(tree size 1)
Siricinae
Tremicinae
(tree size 8)
Ypresiosirex
(tree size 1)
Gigasiricinae
Pararchexyelinae
Megapteritinae
Sinosiricinae
Tremecinae
Myrmiciinae