- Echinodermata, phylum Echinodermata - radially symmetrical marine invertebrates including e.g. starfish and sea urchins and sea cucumbers
--1 is a kind of phylum
--1 is a member of Animalia, kingdom Animalia, animal kingdom
--1 has members:echinoderm; Asteroidea, class Asteroidea; Ophiuroidea, class Ophiuroidea; Echinoidea, class Echinoidea; Crinoidea, class Crinoidea; Holothuroidea, class Holothuroidea