protostoma

名词 n.
中文释义

英文释义

名词 n.
  1. Synonym of blastopore. obsolete
    — It is frequently stated by critics of the protostoma hypothesis that it involves a reversal of dorsal and ventral sides during the evolution of Vertebrates from their invertebrate ancestors but it will be gathered from what has been said that this criticism rests on a misunderstanding.
  2. In nematodes, a particular division of the stoma (mouthlike opening).
    — The protostoma with its wall—the protorhabdion—is the major part of the stoma.

词形变化

protostomata plural

词汇关系

衍生词
protostomal
相关词
protostome

词源

From proto- + Ancient Greek στόμα (stóma, “mouth”).
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