Children (11 direct children, 130 direct and indirect children):
Ochetostoma
(tree size 37)
Echiurus
(tree size 10)
Lissomyema
(tree size 2)
Listriolobus
(tree size 8)
Ikedosoma
(tree size 4)
Anelassorhynchus
(tree size 18)
Arhynchite
(tree size 8)
Thalassema
(tree size 31)
Protechiurus
Echiurinae
Thalassematinae
(tree size 1)