化石で最古の神経系を確認、CTで立体画像


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[October 17 AFP] In having been found until now, research teams, such as U.S. University of Arizona (University of Arizona), announced on the 16th that the oldest perfect central nervous system was checked with the fossil of the strange living thing which lived 520 million years ago.
this living thing with a ? length of only 3 cm inhabited the Cambrian period whose biodiversity increased explosively — “– large attachment — a leg — the friend of a marine organism with the scissors called the animal “.
The fossil was unearthed in the stratum in the southwestern China Yunnan (Yunnan) prefecture, and it is said that the nerve, the eyeball, the brain, and the nerve knot are saved to details.
3D imaging of the ? nervous system was carried out using computed tomography (CT).
This says that comparison with other ready money animals or an ancient living thing is attained.
By ? and this discovery, the ancestor of cheliceras (it writes today), such as a present-day spider and a scorpion, says that he can guess into which time it branched off from other arthropods, such as the crustacea and a millipede.
University of Arizona [ which commanded ? research ] Professor Nicolas Struss フェルド (Nicholas Strausfeld) (neuroscience) — “large attachment — a leg — it turned out that the animal had the central nervous system which resembled a present-day king crab and scorpion very much.
This is got blocked and the ancestor of a spider or its friend is saying that he means having been alive in the time same to Lower Cambrian as the ancestor of the crustacea.”
? paper is published at English science journal Nature (Nature).
(c)AFP




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