Children (12 direct children, 12 direct and indirect children):
Hiatella arctica
Hiatella azaria
Hiatella pholadis
Hiatella striata
Hiatella glaciana
Hiatella orientalis
Hiatella antarctica
Hiatella arenacea
Hiatella australis
Hiatella meridionalis
Hiatella solida
Hiatella rugosa