Children (19 direct children, 109 direct and indirect children):
Heterobrissus
(tree size 6)
Pericosmidae
(tree size 42)
Amphipneustes
(tree size 10)
Genicopatagus
(tree size 1)
Schizocosmus
(tree size 1)
Delopatagus
(tree size 1)
Parapneustes
(tree size 2)
Brachysternaster
(tree size 1)
Paleopneustidea
(tree size 16)
Periasteridae
(tree size 7)
Unifasciidae
(tree size 1)
Paleopneustoidea
Archaeopneustes
(tree size 2)
Kertaster
Eopericosmus
Hemigymnia
Brissolampas
Megapetalus
Pygospatangus