Children (17 direct children, 20 direct and indirect children):
Echinodiscus bisperforatus
(tree size 1)
Echinodiscus auritus
(tree size 2)
Sea pancake
Echinodiscus tenuissimus
Echinodiscus andamanensis
Echinodiscus truncatus
Echinodiscus chikuzenensis
Echinodiscus colchesterensis
Echinodiscus ellipticus
Echinodiscus ginauensis
Echinodiscus hsianglanensis
Echinodiscus pedemontanus
Echinodiscus placenta
Echinodiscus tiliensis
Echinodiscus transiens
Echinodiscus yeliuensis
Echinodiscus quinquiesperforata
Echinodiscus emarginatus