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ParaHoxozoa
The Parahoxozoa are a proposed grouping of animals based on presence of at least a single Hox/ParaHox gene, uniting Placozoa, Cnidaria (jellyfish) and Bilateria.
This grouping excludes Porifera (sponges) and Ctenophora (comb jellies). There is evidence "that a burst of evolutionary innovation in the genes responsible for electrical communication among nerve cells in our brains occurred over 600 million years ago in a common ancestor of" parahoxozoans.〔(Complex nerve-cell signaling traced back to common ancestor of humans and sea anemones ) PhysOrg, February 16, 2015〕 ==References==
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「ParaHoxozoa」の詳細全文を読む
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