Children (6 direct children, 322 direct and indirect children):
Glass knifefish
(tree size 57)
Sternopygidae
Rhamphichthyidae
(tree size 22)
Hypopomidae
(tree size 57)
Ghost knifefish
(tree size 120)
Apteronotidae
Gymnotoidei
(tree size 60)
Sternopygoidei