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单词 θ31800
释义
the world > animals > invertebrates > subkingdom Parazoa > phylum Porifera > class Calcarea > [noun] > member of genus Sycon (1)
sycon1882

A calcareous sponge of the genus of this name; also, a stage in the development of sponges in which flagellated chambers are developed and lined…

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