{"id":333772,"date":"2025-08-21T11:24:32","date_gmt":"2025-08-21T11:24:32","guid":{"rendered":"https:\/\/www.europesays.com\/fr\/333772\/"},"modified":"2025-08-21T11:24:32","modified_gmt":"2025-08-21T11:24:32","slug":"un-etonnant-reptile-decouvert-grace-au-synchrotron-de-grenoble","status":"publish","type":"post","link":"https:\/\/www.europesays.com\/fr\/333772\/","title":{"rendered":"Un \u00e9tonnant reptile d\u00e9couvert gr\u00e2ce au Synchrotron de Grenoble"},"content":{"rendered":"<p>Le Synchrotron de Grenoble par\u00adti\u00adcipe tou\u00adjours acti\u00adve\u00adment aux recherches (et aux d\u00e9cou\u00advertes) sur les dino\u00adsaures. Apr\u00e8s avoir contri\u00adbu\u00e9 \u00e0 celles sur <a href=\"https:\/\/www.placegrenet.fr\/2021\/07\/06\/le-synchrotron-de-grenoble-a-permis-delucider-un-nouveau-mode-respiratoire-chez-les-dinosaures\/541598\" target=\"_blank\" rel=\"noopener nofollow\">le mode res\u00adpi\u00adra\u00adtoire<\/a> et les <a href=\"https:\/\/www.placegrenet.fr\/2021\/10\/23\/grace-a-lesrf-la-datation-des-comportements-sociaux-chez-les-dinosaures-est-reculee-de-plus-de-40-millions-dannees\/549366\" target=\"_blank\" rel=\"noopener nofollow\">com\u00adpor\u00adte\u00adments sociaux<\/a> de ces loin\u00adtains occu\u00adpants de la terre, l\u2019ESRF a r\u00e9cem\u00adment scann\u00e9 le cr\u00e2ne d\u2019une nou\u00advelle esp\u00e8ce de rep\u00adtiles, le Mirasaura grau\u00advo\u00adgeli, vieux de 247 mil\u00adlions d\u2019an\u00adn\u00e9es. Lequel a eu droit \u00e0 la publi\u00adca\u00adtion d\u2019un article scien\u00adti\u00adfique dans la revue Nature, en date du 23 juillet 2025.<\/p>\n<p>L\u2019\u00e9quipe scien\u00adti\u00adfique, diri\u00adg\u00e9e par le <a href=\"https:\/\/www.naturkundemuseum-bw.de\/en\/\" target=\"_blank\" rel=\"noopener nofollow\">Mus\u00e9e natio\u00adnal d\u2019his\u00adtoire natu\u00adrelle de Stuttgart<\/a>, d\u00e9crit un ani\u00admal qui \u00ab\u00a0pr\u00e9\u00adsente des carac\u00adt\u00e9\u00adris\u00adtiques de rep\u00adtiles, mais se dis\u00adtingue par une cr\u00eate dor\u00adsale in\u00e9dite for\u00adm\u00e9e d\u2019appendices d\u2019une grande com\u00adplexit\u00e9 struc\u00adtu\u00adrelle, rap\u00adpe\u00adlant cer\u00adtaines carac\u00adt\u00e9\u00adris\u00adtiques des plumes\u00a0\u00bb. De quoi d\u00e9mon\u00adtrer que ces \u00ab\u00a0struc\u00adtures cuta\u00adn\u00e9es \u00e9la\u00adbo\u00adr\u00e9es\u00a0\u00bb n\u2019ap\u00adpar\u00adtiennent pas qu\u2019aux oiseaux et leurs proches parents, et ainsi bou\u00adle\u00adver\u00adser la com\u00adpr\u00e9\u00adhen\u00adsion de l\u2019\u00e9\u00advo\u00adlu\u00adtion des reptiles.<\/p>\n<p><a href=\"https:\/\/www.europesays.com\/fr\/wp-content\/uploads\/2025\/08\/mirasaura-grauvogeli-2-scaled.jpg\" target=\"_blank\" rel=\"noopener\"><img fetchpriority=\"high\" decoding=\"async\" aria-describedby=\"caption-attachment-657975\" class=\"wp-image-657975 size-full\" src=\"data:image\/svg+xml,%3Csvg%20xmlns=\" http:=\"\" alt=\"Le Mirasaura grauvogeli, une esp\u00e8ce de \u201cserpent \u00e0 plumes\u201d, ou plut\u00f4t un reptile nanti d'une cr\u00eate faisant penser aux plumes de oiseaux, et dont le Synchrotron a permis de scanner le cr\u00e2ne, sur la base d'un \u00e9chantillon de quelques centim\u00e8tres de longueur et moins de 0,5 millim\u00e8tre de largeur. \u00a9 ESRF\" width=\"2048\" height=\"1218\" data-lazy- data-lazy- data-lazy-src=\"https:\/\/www.europesays.com\/fr\/wp-content\/uploads\/2025\/08\/mirasaura-grauvogeli-2-scaled.jpg\"\/><\/a><\/p>\n<p id=\"caption-attachment-657975\" class=\"wp-caption-text\">Le Mirasaura grau\u00advo\u00adgeli, une esp\u00e8ce de \u201cser\u00adpent \u00e0 plumes\u201d, ou plu\u00adt\u00f4t un rep\u00adtile nanti d\u2019une cr\u00eate fai\u00adsant pen\u00adser aux plumes de oiseaux et dont le Synchrotron a per\u00admis de scan\u00adner le cr\u00e2ne, sur la base d\u2019un \u00e9chan\u00adtillon de quelques cen\u00adti\u00adm\u00e8tres de lon\u00adgueur et de moins de 0,5 mil\u00adli\u00adm\u00e8tre de lar\u00adgeur. \u00a9\u00a0ESRF<\/p>\n<p>Le r\u00f4le du Synchrotron de Grenoble dans la d\u00e9cou\u00adverte de ce sp\u00e9\u00adci\u00admen \u00e0 plumes\u00a0? \u00ab\u00a0Pour ana\u00adly\u00adser l\u2019\u00e9\u00adchan\u00adtillon, mesu\u00adrant quelques cen\u00adti\u00adm\u00e8tres de lon\u00adgueur et moins de 0,5 mil\u00adli\u00adm\u00e8tre de lar\u00adgeur, l\u2019\u00e9\u00adquipe est venue [\u00e0] l\u2019ESRF, sur la ligne BM18, unique au monde pour la pal\u00e9on\u00adto\u00adlo\u00adgie. [\u2026] Ils ont pu recons\u00adti\u00adtuer vir\u00adtuel\u00adle\u00adment le cr\u00e2ne en 3D\u00a0: un cr\u00e2ne large et bomb\u00e9 en forme d\u2019oi\u00adseau avec un museau \u00e9troit et pra\u00adti\u00adque\u00adment d\u00e9pourvu de dents, et de grandes orbites orien\u00adt\u00e9es vers l\u2019a\u00advant\u00a0\u00bb, d\u00e9crit l\u2019ESRF.<\/p>\n<p>\u00ab\u00a0Sans l\u2019ESRF, il aurait \u00e9t\u00e9 impos\u00adsible de r\u00e9a\u00adli\u00adser la recons\u00adtruc\u00adtion du cr\u00e2ne, car le fos\u00adsile est si petit qu\u2019il est incroya\u00adble\u00adment dif\u00adfi\u00adcile \u00e0 scan\u00adner\u00a0\u00bb, a d\u00e9clar\u00e9 le pal\u00e9on\u00adto\u00adlogue Stephan Spiekman, pre\u00admier auteur de l\u2019\u00e9\u00adtude. De son c\u00f4t\u00e9, Kathleen Dollman, scien\u00adti\u00adfique \u00e0 l\u2019ESRF et co-autrice de l\u2019ar\u00adticle, vante \u00ab\u00a0les per\u00adfor\u00admances uniques et non des\u00adtruc\u00adtives du fais\u00adceau de lumi\u00e8re de l\u2019ESRF, [qui] en font un outil id\u00e9al pour des exp\u00e9\u00adriences com\u00adplexes sur des \u00e9chan\u00adtillons tr\u00e8s petits et pr\u00e9\u00adcieux\u00a0\u00bb.<\/p>\n","protected":false},"excerpt":{"rendered":"Le Synchrotron de Grenoble par\u00adti\u00adcipe tou\u00adjours acti\u00adve\u00adment aux recherches (et aux d\u00e9cou\u00advertes) sur les dino\u00adsaures. Apr\u00e8s avoir contri\u00adbu\u00e9&hellip;\n","protected":false},"author":2,"featured_media":333773,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9566],"tags":[1111,11,2430,1777,674,1011,27,2731,12,25],"class_list":{"0":"post-333772","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-grenoble","8":"tag-actu","9":"tag-actualites","10":"tag-auvergne-rhone-alpes","11":"tag-eu","12":"tag-europe","13":"tag-fr","14":"tag-france","15":"tag-grenoble","16":"tag-news","17":"tag-republique-francaise"},"share_on_mastodon":{"url":"https:\/\/pubeurope.com\/@fr\/115066507269211765","error":""},"_links":{"self":[{"href":"https:\/\/www.europesays.com\/fr\/wp-json\/wp\/v2\/posts\/333772","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.europesays.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.europesays.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/fr\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/fr\/wp-json\/wp\/v2\/comments?post=333772"}],"version-history":[{"count":0,"href":"https:\/\/www.europesays.com\/fr\/wp-json\/wp\/v2\/posts\/333772\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/fr\/wp-json\/wp\/v2\/media\/333773"}],"wp:attachment":[{"href":"https:\/\/www.europesays.com\/fr\/wp-json\/wp\/v2\/media?parent=333772"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.europesays.com\/fr\/wp-json\/wp\/v2\/categories?post=333772"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.europesays.com\/fr\/wp-json\/wp\/v2\/tags?post=333772"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}