Children (13 direct children, 63 direct and indirect children):
Exogyra
Gryphaea
(tree size 10)
Devil's toenail
Pycnodonte
(tree size 7)
Neopycnodonte
(tree size 2)
Empressostrea
(tree size 1)
Gigantostrea
Crenostrea
(tree size 3)
Rhynchostreon
(tree size 1)
Pycnodonteinae
(tree size 21)
Exogyrinae
(tree size 3)
Gryphaeinae
Gryphaeostreinae
(tree size 2)
Aetostreon