Children (10 direct children, 10 direct and indirect children):
Phragmatopoma attenuata
Phragmatopoma virgini
Phragmatopoma caudata
Sandcastle worm
Phragmatopoma californica
Phragmatopoma balbinae
Phragmatopoma carlosi
Phragmatopoma digitata
Phragmatopoma moerchi
Phragmatopoma peruensis
Phragmatopoma villalobosi