Children (11 direct children, 73 direct and indirect children):
Tripneustes
(tree size 13)
Lytechinus
(tree size 17)
Toxopneustes
(tree size 7)
Gymnechinus
(tree size 4)
Nudechinus
(tree size 12)
Pseudoboletia
(tree size 4)
Sphaerechinus
(tree size 1)
Goniopneustes
(tree size 1)
Schizechinus
(tree size 2)
Scoliechinus
(tree size 1)
Oligophyma