Children (6 direct children, 9 direct and indirect children):
Mikadotrochus hirasei
(tree size 1)
Mikadotrochus beyrichii
Mikadotrochus caledonicus
Perotrochus caledonicus
Mikadotrochus gotoi
Mikadotrochus salmianus
(tree size 2)
Mikadotrochus schmalzi