Children (9 direct children, 9 direct and indirect children):
Parastichopus tremulus
Parastichopus parvimensis
Giant california sea cucumber
Parastichopus californicus
Parastichopus johnsoni
Parastichopus leukothele
Parastichopus nigripunctatus
Parastichopus regalis
Parastichopus multidentis
Parastichopus nipponensis