urbilaterian

名词 n.

英文释义

名词 n.
  1. The hypothetical last common ancestor to all bilaterians.
    — There is no fossil record to show that the urbilaterian existed. However, the echoes of the existence of this creature are recorded in stunning clarity in the genes of every living descendant, from fruit fly to spider to human.

词形变化

urbilaterians plural

词源

From ur- (“original”) + bilaterian.
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