Children (16 direct children, 18 direct and indirect children):
Tristichotrochus aculeatus
(tree size 2)
Tristichotrochus consors
Tristichotrochus crossleyae
Tristichotrochus gendalli
Tristichotrochus haliarchus
Tristichotrochus shingawaensis
Tristichotrochus tosaensis
Tristichotrochus unicus
Tristichotrochus canaliculatus
Tristichotrochus galea
Tristichotrochus ikukoae
Tristichotrochus iwaotakii
Tristichotrochus margaritissimus
Tristichotrochus mikikoae
Tristichotrochus multiliratus
Tristichotrochus nakamigawai