{"id":84793,"date":"2024-04-16T18:19:08","date_gmt":"2024-04-16T18:19:08","guid":{"rendered":"https:\/\/www.africa-press.net\/burkina-faso\/politique\/des-kangourous-fossiles-geants-decouverts-en-australie"},"modified":"2024-04-16T19:54:32","modified_gmt":"2024-04-16T19:54:32","slug":"des-kangourous-fossiles-geants-decouverts-en-australie","status":"publish","type":"post","link":"https:\/\/www.africa-press.net\/burkina-faso\/toutes-les-actualites\/des-kangourous-fossiles-geants-decouverts-en-australie","title":{"rendered":"Des kangourous fossiles g\u00e9ants d\u00e9couverts en Australie"},"content":{"rendered":"

Africa-Press – Burkina Faso. <\/strong><\/span>Au pays des kangourous, les kangourous ont toujours e\u0301te\u0301 les rois. En te\u0301moignent les trois nouvelles espe\u0300ces re\u0301cemment de\u0301crites dans la revue Megataxa, par les e\u0301quipes de l’Universite\u0301 Flinders, a\u0300 Ade\u0301lai\u0308de, en Australie.<\/p>\n

Toutes trois appartiennent au genre Protemnodon, des marsupiaux qui vivaient il y a 5 millions d’anne\u0301es et ont surve\u0301cu jusqu’il y a 40.000 ans, date de leur disparition, pour des raisons encore inconnues.<\/p>\n

Plusieurs squelettes retrouve\u0301s<\/b><\/p>\n

Le travail sur Protemnodon a e\u0301te\u0301 mene\u0301 par le pale\u0301ontologue Isaac Kerr et repose sur la de\u0301couverte de plusieurs squelettes complets de kangourous autour du lac Callabonna, dans le sud de l’Australie.<\/p>\n

Leur analyse a permis de de\u0301crire une premie\u0300re nouvelle espe\u0300ce baptise\u0301e Protemnodon viator. Il s’agit d’un grand animal qui pouvait peser jusqu’a\u0300 170 kg (soit le double du kangourou roux actuel) et qui pouvait sauter de fac\u0327on tre\u0300s efficace gra\u0302ce a\u0300 ses longues pattes.<\/p>\n

Les deux autres espe\u0300ces identifie\u0301es l’ont e\u0301te\u0301 a\u0300 partir de l’e\u0301tude de restes fossilise\u0301s (plus de 800 fossiles ont e\u0301te\u0301 compare\u0301s) mais aussi de l’analyse des publications scientifiques re\u0301alise\u0301es depuis la de\u0301couverte de ce genre, en 1874, par le pale\u0301ontologue britannique Sir Richard Owen, l’homme qui a pour la premie\u0300re fois utilise\u0301 le terme dinosaure.<\/p>\n

Il s’agit de Protemnodon mamkurra, une espe\u0300ce d’assez grande taille mais pourvue d’os robustes et lourds. Ces animaux ne devaient pas se de\u0301placer sur deux pattes mais sur quatre et utiliser le saut en bipe\u0301die que lors de circonstances particulie\u0300res, telles que la fuite.<\/p>\n

La dernie\u0300re espe\u0300ce est Protemnodon dawsonae, elle est connue gra\u0302ce a\u0300 quelques fossiles de\u0301couverts dans les grottes de Wellington, en Nouvelle-Galles-du-Sud. On sait peu de chose a\u0300 leur propos, hormis que c’e\u0301tait un animal de taille moyenne qui ressemblait a\u0300 un wallaby bicolore.<\/p>\n

Disparition soudaine<\/b><\/p>\n

Bien que les fossiles de Protemnodon soient assez courants en Australie, l’identification des espe\u0300ces auxquels ils appartenaient n’avaient rien de facile faute de squelettes complets. Cette nouvelle e\u0301tude va permettre de mieux connai\u0302tre les diffe\u0301rents membres de ce genre et d’en savoir plus sur leur re\u0301partition, en Australie mais aussi sur les i\u0302les voisines de Tasmanie et de Nouvelle-Guine\u0301e.<\/p>\n


\nCes informations sont de nature a\u0300 mieux comprendre les raisons de leur disparition subite, il y a environ 40.000 ans, en Australie (ils ont peut-e\u0302tre persiste\u0301 un peu plus longtemps sur les autres i\u0302les).<\/p>\n

Cette extinction s’est produite malgre\u0301 leurs diffe\u0301rences de taille, d’adaptations, d’habitat et de re\u0301partition ge\u0301ographique. Et ceci alors que de nombreux animaux similaires et e\u0301troitement apparente\u0301s, tels que les kangourous gris, sont eux toujours pre\u0301sents dans la me\u0301gafaune australienne.<\/p>\n

Pour plus d’informations et d’analyses sur la Burkina Faso<\/a>, suivez Africa-Press<\/a><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"

Africa-Press – Burkina Faso. Au pays des kangourous, les kangourous ont toujours e\u0301te\u0301 les rois. En te\u0301moignent les trois nouvelles espe\u0300ces re\u0301cemment de\u0301crites dans la revue Megataxa, par les e\u0301quipes de l’Universite\u0301 Flinders, a\u0300 Ade\u0301lai\u0308de, en Australie. Toutes trois appartiennent au genre Protemnodon, des marsupiaux qui vivaient il y a 5 millions d’anne\u0301es et ont […]<\/p>\n","protected":false},"author":82,"featured_media":84792,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22,10],"tags":[111,725,29],"class_list":["post-84793","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-divers","category-toutes-les-actualites","tag-africa-press","tag-africa-press-burkina-faso","tag-burkina-faso"],"yoast_head":"\nDes kangourous fossiles g\u00e9ants d\u00e9couverts en Australie - Burkina Faso<\/title>\n<meta name=\"description\" content=\"Au pays des kangourous, les kangourous ont toujours e\u0301te\u0301 les rois. 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