Children (8 direct children, 8 direct and indirect children):
Sharpnose sevengill shark
Slender sevengill
Heptranchias dakini
Heptranchias cinereus
Heptranchias howelli
Heptranchias howelii
Heptranchias angio
Heptranchias cepedianus
Heptranchias deani