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Entomostraca 昆甲类 昆甲类 Entomostraca n 1: in some older classifications includes the Branchiopoda and Copepoda and Ostracoda and Cirripedia; no longer in technical use [ synonym: { Entomostraca}, { subclass Entomostraca}] Entomostraca \ En` to* mos" tra* ca\, n. pl. [ NL., fr. Gr. ? cut in pieces ? burnt clay, the hard shell of Testacea.] ( Zo[" o] l.) One of the subclasses of Crustacea, including a large number of species, many of them minute. The group embraces several orders; as the { Phyllopoda}, { Ostracoda}, { Copepoda}, and { Pectostraca}. See { Copepoda}, { Phyllopoda}, and { Cladocera}. [ 1913 Webster]
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