单词	Echinoidea
释义	Echinoidea /ˌɛkɪˈnɔɪdɪə / plural noun Zoology A class of echinoderms that comprises the sea urchins.Ophiuroidea is grouped with Echinoidea and Holothuroidea based on the closed ambicular grooves.... Clark endorsed splitting L. sexiesperforata from Mellita but Mortensen used the name Leodia as a subgenus of Mellita in his extremely influential Monograph of the Echinoidea. BNip3-related sequences were found in all major lineages of Bilateria, from Echinoidea and Ascidiacea to mammals. Origin Modern Latin (plural), from echinus.
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