Children (9 direct children, 9 direct and indirect children):
Pentametrocrinus spinosus
Pentametrocrinus paucispinulus
Pentametrocrinus atlanticus
Pentametrocrinus varians
Pentametrocrinus semperi
Pentametrocrinus australis
Pentametrocrinus diomedeae
Pentametrocrinus japonicus
Pentametrocrinus tuberculatus