{"id":9467,"date":"2023-05-30T19:26:53","date_gmt":"2023-05-30T19:26:53","guid":{"rendered":"https:\/\/www.africa-press.net\/comores\/politique\/decouverte-des-plus-vieux-os-de-pterosaures-australiens"},"modified":"2023-05-30T20:51:36","modified_gmt":"2023-05-30T20:51:36","slug":"decouverte-des-plus-vieux-os-de-pterosaures-australiens","status":"publish","type":"post","link":"https:\/\/www.africa-press.net\/comores\/toutes-les-actualites\/decouverte-des-plus-vieux-os-de-pterosaures-australiens","title":{"rendered":"D\u00e9couverte des plus vieux os de pt\u00e9rosaures australiens"},"content":{"rendered":"<p><span style=\"color: #ff6600\"><strong>Africa-Press &#8211; Comores. <\/strong><\/span>Apparus de\u0300s le Trias, il y a environ 225 millions d\u2019anne\u0301es, les pte\u0301rosaures ont occupe\u0301 les airs jusqu\u2019a\u0300 la fin du Cre\u0301tace\u0301, il y a 66 millions d\u2019anne\u0301es, pe\u0301riode a\u0300 laquelle ils se sont e\u0301teints en me\u0302me temps que les dinosaures et de nombreuses autres espe\u0300ces terrestres et marines. Si beaucoup d\u2019entre eux correspondaient a\u0300 de petits animaux avec une envergure d\u2019un me\u0300tre, certains ont atteint d\u2019impressionnantes dimensions.<\/p>\n<p>Leurs os fins et creux, beaucoup plus fragiles que ceux des dinosaures non aviens, se sont tre\u0300s mal conserve\u0301s dans les se\u0301diments. Mais, parfois, certains re\u0301sistent et leur analyse permet d\u2019e\u0301clairer l\u2019histoire de ce myste\u0301rieux groupe. Plusieurs ont ainsi e\u0301te\u0301 excave\u0301s du sous-sol australien, comme c\u2019est le cas des fossiles pre\u0301sente\u0301s dans une nouvelle e\u0301tude publie\u0301e dans la revue Historical Biology.<\/p>\n<p><b>Deux pte\u0301rosaures identifie\u0301s<\/b><\/p>\n<p>Les os, l\u2019un constituant une partie d\u2019un bassin et l\u2019autre d\u2019une aile, ont e\u0301te\u0301 trouve\u0301s a\u0300 la fin des anne\u0301es 1980, lors de fouilles mene\u0301es a\u0300 Dinosaur Cove, une petite crique situe\u0301e au sud-est de l\u2019Australie, dans l\u2019e\u0301tat de Victoria. Pour les de\u0301nicher, des pale\u0301ontologues, assiste\u0301s de nombreux be\u0301ne\u0301voles, ont du creuser un tunnel de pre\u0300s de soixante me\u0300tres de long, a\u0300 flanc de falaise.<\/p>\n<p>Bien d\u2019autres restes de dinosaures et d\u2019animaux y ont aussi e\u0301te\u0301 retrouve\u0301s, dans des se\u0301diments date\u0301s du Cre\u0301tace\u0301, soit 107 millions d\u2019anne\u0301es en arrie\u0300re. Ceux appartenant aux pte\u0301rosaures ont e\u0301te\u0301 de\u0301couverts par les e\u0301quipes des Muse\u0301es de Victoria (qui regroupent plusieurs e\u0301tablissements) et analyse\u0301s par Adele Pentland, de l\u2019Universite\u0301 Curtin. Les re\u0301sultats des investigations confirment d\u2019abord l\u2019a\u0302ge des deux pte\u0301rosaures et indiquent que l\u2019os du bassin appartenait a\u0300 un animal de grande taille avec une envergure d\u2019aile de plus de deux me\u0300tres. L\u2019autre os provient d\u2019un individu bien plus petit et il s\u2019agit tre\u0300s probablement d\u2019un juve\u0301nile, le premier jamais de\u0301couvert en Australie.<\/p>\n<p><b>Un milieu difficile<\/b><\/p>\n<p>Durant le Cre\u0301tace\u0301, l\u2019Australie e\u0301tait situe\u0301e plus au sud qu\u2019actuellement et l\u2019e\u0301tat de Victoria se trouvait a\u0300 l\u2019inte\u0301rieur du cercle polaire. Si les tempe\u0301ratures n\u2019e\u0301taient pas aussi basses que de nos jours (l\u2019Antarctique e\u0301tait alors recouverte de fore\u0302ts ou\u0300 pouvaient me\u0302me s\u2019aventurer des dinosaures), pendant l\u2019hiver la nuit durait plusieurs semaines. Comment ces pte\u0301rosaures se sont-ils adapte\u0301s a\u0300 cet environnement ? Il est possible qu\u2019ils aient migre\u0301 plus au nord durant cette pe\u0301riode, pour aller se reproduire dans des re\u0301gions plus ensoleille\u0301es. Mais les scientifiques n\u2019excluent pas l\u2019hypothe\u0300se d\u2019adaptations qui leur permettaient de survivre sur place. Ils comptent s\u2019emparer de cette question dans une prochaine publication.<\/p>\n<p><strong>Pour plus d&rsquo;informations et d&rsquo;analyses sur la <a href=\"https:\/\/www.africa-press.net\/comores\">Comores<\/a>, suivez <a href=\"https:\/\/www.africa-press.net\/\">Africa-Press<\/a><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Africa-Press &#8211; Comores. Apparus de\u0300s le Trias, il y a environ 225 millions d\u2019anne\u0301es, les pte\u0301rosaures ont occupe\u0301 les airs jusqu\u2019a\u0300 la fin du Cre\u0301tace\u0301, il y a 66 millions d\u2019anne\u0301es, pe\u0301riode a\u0300 laquelle ils se sont e\u0301teints en me\u0302me temps que les dinosaures et de nombreuses autres espe\u0300ces terrestres et marines. Si beaucoup d\u2019entre [&hellip;]<\/p>\n","protected":false},"author":82,"featured_media":9466,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22,10],"tags":[36,53,45],"class_list":["post-9467","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-divers","category-toutes-les-actualites","tag-africa-press","tag-africa-press-comores","tag-comores"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.1 (Yoast SEO v27.0) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>D\u00e9couverte des plus vieux os de pt\u00e9rosaures australiens - Comores<\/title>\n<meta name=\"description\" content=\"Apparus de\u0300s le Trias, il y a environ 225 millions d\u2019anne\u0301es, les pte\u0301rosaures ont occupe\u0301 les airs jusqu\u2019a\u0300 la fin du C ...\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.africa-press.net\/comores\/toutes-les-actualites\/decouverte-des-plus-vieux-os-de-pterosaures-australiens\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"D\u00e9couverte des plus vieux os de pt\u00e9rosaures australiens\" \/>\n<meta property=\"og:description\" content=\"Apparus de\u0300s le Trias, il y a environ 225 millions d\u2019anne\u0301es, les pte\u0301rosaures ont occupe\u0301 les airs jusqu\u2019a\u0300 la fin du C ...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.africa-press.net\/comores\/toutes-les-actualites\/decouverte-des-plus-vieux-os-de-pterosaures-australiens\" \/>\n<meta property=\"og:site_name\" content=\"Comores\" \/>\n<meta property=\"article:published_time\" content=\"2023-05-30T19:26:53+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-05-30T20:51:36+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/static.africa-press.net\/centrafricaine\/sites\/48\/2023\/05\/sm_1685463245.467869.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"899\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"cfeditorfr\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"cfeditorfr\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.africa-press.net\/comores\/toutes-les-actualites\/decouverte-des-plus-vieux-os-de-pterosaures-australiens#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.africa-press.net\/comores\/toutes-les-actualites\/decouverte-des-plus-vieux-os-de-pterosaures-australiens\"},\"author\":{\"name\":\"cfeditorfr\",\"@id\":\"https:\/\/www.africa-press.net\/comores\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1\"},\"headline\":\"D\u00e9couverte des plus vieux os de pt\u00e9rosaures australiens\",\"datePublished\":\"2023-05-30T19:26:53+00:00\",\"dateModified\":\"2023-05-30T20:51:36+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.africa-press.net\/comores\/toutes-les-actualites\/decouverte-des-plus-vieux-os-de-pterosaures-australiens\"},\"wordCount\":543,\"commentCount\":0,\"image\":{\"@id\":\"https:\/\/www.africa-press.net\/comores\/toutes-les-actualites\/decouverte-des-plus-vieux-os-de-pterosaures-australiens#primaryimage\"},\"thumbnailUrl\":\"https:\/\/static.africa-press.net\/centrafricaine\/sites\/48\/2023\/05\/sm_1685463245.467869.jpg\",\"keywords\":[\"Africa Press\",\"Africa Press-Comores\",\"Comores\"],\"articleSection\":[\"Divers\",\"Toutes les actualit\u00e9s\"],\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.africa-press.net\/comores\/toutes-les-actualites\/decouverte-des-plus-vieux-os-de-pterosaures-australiens#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.africa-press.net\/comores\/toutes-les-actualites\/decouverte-des-plus-vieux-os-de-pterosaures-australiens\",\"url\":\"https:\/\/www.africa-press.net\/comores\/toutes-les-actualites\/decouverte-des-plus-vieux-os-de-pterosaures-australiens\",\"name\":\"D\u00e9couverte des plus vieux os de pt\u00e9rosaures australiens - 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