{"id":4131,"date":"2025-10-31T14:55:52","date_gmt":"2025-10-31T17:55:52","guid":{"rendered":"https:\/\/overticeportal.com.br\/?p=4131"},"modified":"2025-10-31T14:55:54","modified_gmt":"2025-10-31T17:55:54","slug":"mini-t-rex-cientistas-desvendam-misterio-por-tras-de-fossil-de-2006","status":"publish","type":"post","link":"https:\/\/portalam9.com.br\/?p=4131","title":{"rendered":"Mini T-rex? Cientistas desvendam mist\u00e9rio por tr\u00e1s de f\u00f3ssil de 2006"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\"><em>Tempo de leitura: 2 minutos <\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Em 2006, foram encontrados dois f\u00f3sseis dos \u201cDinossauros em Duelo\u201d \u2013 um Triceratops e um pequeno dinossauro \u2013 na Forma\u00e7\u00e3o Hell Creek, em Montana (EUA). Durante muito tempo, cientistas acreditavam que um dos brig\u00f5es era um<em> Tyrannosaurus rex<\/em> jovem. No entanto, uma an\u00e1lise mais recente demonstra que hist\u00f3ria \u00e9 outra.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Na verdade, o f\u00f3ssil pertence a uma esp\u00e9cie completamente diferente: o\u00a0<em>Nanotyrannus lancensis<\/em>\u00a0adulto. A descoberta realizada por pesquisadores norte-americanos foi publicada na\u00a0revista cient\u00edfica Nature\u00a0nessa quinta-feira (30\/10).<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u201cEste f\u00f3ssil n\u00e3o apenas encerra o debate, como tamb\u00e9m revoluciona d\u00e9cadas de pesquisa sobre o<em>&nbsp;T. rex<\/em>&nbsp;\u201d, exalta a autora principal do estudo, Lindsay Zanno, professora da Universidade Estadual da Carolina do Norte, nos Estados Unidos, em comunicado.<\/p>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">De acordo com pesquisadores, as caracter\u00edsticas do exemplar n\u00e3o batiam com as do&nbsp;<em>T.rex<\/em>: o&nbsp;<em>Nanotyrannus<\/em>&nbsp;tinha bra\u00e7os mais longos, cauda mais curta e dentes mais afiados e menos curvados.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Para determinar a idade e a taxa de crescimento do animal, foram estudados os an\u00e9is de expans\u00e3o de uma fina parte dos ossos. Tamb\u00e9m foram utilizadas informa\u00e7\u00f5es sobre fus\u00e3o espinhal e anatomia do desenvolvimento. Assim, os pesquisadores determinaram que n\u00e3o era um tiranossauro adolescente, mas sim um&nbsp;<em>Nanotyrannus<\/em>&nbsp;com cerca de 20 anos e fisicamente maduro.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u201cPara que o&nbsp;<em>Nanotyrannus<\/em>&nbsp;seja um<em>&nbsp;T. rex<\/em>&nbsp;juvenil , ele precisaria desafiar tudo o que sabemos sobre o crescimento dos vertebrados. N\u00e3o \u00e9 apenas improv\u00e1vel, \u00e9 imposs\u00edvel\u201d, afirma o coautor do estudo, James Napoli, anatomista da Universidade Stony Brook, nos Estados Unidos.<\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\">Nova esp\u00e9cie de dinossauro descoberta por acaso<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Lindsay e Napoli analisaram mais de 200\u00a0f\u00f3sseis de tiranossauros\u00a0durante a pesquisa. Em dos exemplares \u2013 tamb\u00e9m considerado um\u00a0<em>T.rex<\/em>\u00a0adolescente anteriormente \u2013, foram achados atributos ligeiramente distintos do\u00a0<em>Nanotyrannus lancensis<\/em>\u00a0do \u201cDinossauros em Duelo\u201d.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ap\u00f3s testes, foi confirmado que se tratava de outra varia\u00e7\u00e3o do\u00a0<em>Nanotyrannus.\u00a0<\/em>A nova esp\u00e9cie descoberta por acaso foi batizada de\u00a0<em>Nanotyrannus lethaeus<\/em>, em homenagem ao rio Lete da mitologia grega, fazendo ilus\u00e3o como o\u00a0animal ficou escondido\u00a0e esquecido por d\u00e9cadas.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u201cEssa descoberta pinta um quadro mais rico e competitivo dos \u00faltimos dias dos dinossauros. Com seu tamanho enorme, mordida poderosa e vis\u00e3o estereosc\u00f3pica, o<em>&nbsp;T. rex<\/em>&nbsp;era um predador formid\u00e1vel, mas n\u00e3o reinava sem contesta\u00e7\u00e3o. Ao seu lado, surgia o&nbsp;<em>Nanotyrannus<\/em>&nbsp;\u2013 um ca\u00e7ador mais esguio, veloz e \u00e1gil\u201d, finaliza Lindsay.<\/p>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\"><em>Fonte: Metr\u00f3poles <strong>\/ <\/strong>Foto: Divulga\u00e7\u00e3o\/Museu de Ci\u00eancias Naturais da Carolina do Norte<br><\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tempo de leitura: 2 minutos Em 2006, foram encontrados dois f\u00f3sseis dos \u201cDinossauros em Duelo\u201d<\/p>\n","protected":false},"author":3,"featured_media":4132,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[],"class_list":["post-4131","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-curiosidades-2"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Mini T-rex? 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