{"id":64254,"date":"2026-03-15T21:37:47","date_gmt":"2026-03-15T21:37:47","guid":{"rendered":"http:\/\/69b1d0360df41ca833e215cd"},"modified":"2026-03-15T21:37:47","modified_gmt":"2026-03-15T21:37:47","slug":"un-pequeno-dinosaurio-argentino-parecido-a-un-ave-es-la-piedra-rosetta-para-entender-a-los-teropodos-mas-misteriosos","status":"publish","type":"post","link":"https:\/\/sarmiento24h.com\/?p=64254","title":{"rendered":"Un peque\u00f1o dinosaurio argentino parecido a un ave es la \u201cPiedra Rosetta\u201d para entender a los ter\u00f3podos m\u00e1s misteriosos"},"content":{"rendered":"<p>Un f\u00f3sil de dinosaurio de hace unos 90 millones de a\u00f1os, hallado en Argentina, podr\u00eda arrojar por fin luz sobre la historia evolutiva de los alvarezsaurios, un misterioso grupo de dinosaurios ter\u00f3podos similares a las aves.<\/p>\n<p>As\u00ed lo ha comunicado un equipo internacional de investigaci\u00f3n, coordinado por la Universidad de Minnesota Twin Cities. Seg\u00fan los cient\u00edficos, <a href=\"https:\/\/es.wired.com\/articulos\/anadoluvius-turkae-el-fosil-que-pone-en-jaque-a-la-teoria-del-origen-de-los-hominidos\">el f\u00f3sil<\/a> pertenece a <em>Alnashetri cerropoliciensis<\/em> y podr\u00eda ser el eslab\u00f3n perdido que ayude a resolver por fin el antiguo debate sobre su evoluci\u00f3n y dispersi\u00f3n en el mundo antiguo. La descripci\u00f3n del f\u00f3sil se public\u00f3 en <a href=\"https:\/\/www.nature.com\/articles\/s41586-026-10194-3.epdf?sharing_token=74Kn-yjgm6suwLVMgA1prNRgN0jAjWel9jnR3ZoTv0Oi3LSxHx4g051zlSnBXa5YxFME4pV9gFk3wOC0eNN9Q58hbG_KxRPtqv-cBqUbjKKj1CuU8Mbi_2kBxzHRs4mWPmFT1xbUfwNGrwiiv9QHZZ4rNRgi_ytJUcEMU20U1oVyUzkt0Ngxw-VjD_kvw85nLZ0Q4VEdAokCXpXCilibxw%3D%3D&amp;tracking_referrer=www.wired.it\" target=\"_blank\">las p\u00e1ginas<\/a> de <em>Nature<\/em>.<\/p>\n<h2>Qu\u00e9 son los Alvarezsaurus<\/h2>\n<p>El f\u00f3sil de dinosaurio fue descubierto en 2014 en el norte de la Patagonia, concretamente en la regi\u00f3n de La Buitrera, un yacimiento ya famoso en todo el mundo por su riqueza en f\u00f3siles del Cret\u00e1cico. <strong>El <em>Alnashetri cerropoliciensis<\/em> pertenece a los Alvarezsaurios, un g\u00e9nero de <a href=\"https:\/\/es.wired.com\/articulos\/donde-surgieron-los-primeros-dinosaurios-un-nuevo-modelo-propone-una-respuesta\">peque\u00f1os dinosaurios<\/a> famosos por sus diminutos dientes y sus cortos brazos terminados en una gran garra en forma de pulgar.<\/strong> Durante d\u00e9cadas, sin embargo, la historia evolutiva de este grupo permaneci\u00f3 rodeada de misterio porque la mayor\u00eda de <a href=\"https:\/\/es.wired.com\/articulos\/nuevos-fosiles-del-hobbit-de-las-flores-el-hominido-mas-pequeno-aportan-pistas-sobre-su-origen\">los f\u00f3siles<\/a> se encontraron en Asia, mientras que los hallazgos de Sudam\u00e9rica eran fragmentarios y muy dif\u00edciles de interpretar.<\/p>\n<p>El descubrimiento de este f\u00f3sil de dinosaurio casi completo y bien conservado ha permitido a los investigadores arrojar luz sobre <a href=\"https:\/\/es.wired.com\/articulos\/descubren-esqueleto-completo-de-un-titanosaurio-de-hace-70-millones-de-anos\">la anatom\u00eda de estos dinosaurios<\/a> y reconstruir su <a href=\"https:\/\/es.wired.com\/articulos\/es-la-evolucion-capaz-de-evolucionar-un-modelo-computacional-explora-la-enigmatica-hipotesis\">historia evolutiva<\/a>. \u00abPasar de f\u00f3siles fragmentarios, dif\u00edciles de interpretar, a tener un animal casi completo y articulado es como encontrar una piedra Rosetta paleontol\u00f3gica\u00bb, afirma Peter Makovicky, el autor principal. A\u00f1ade: \u00abAhora tenemos un punto de referencia que nos permite identificar con precisi\u00f3n m\u00e1s hallazgos fragmentarios y cartografiar <a href=\"https:\/\/es.wired.com\/articulos\/partes-del-adn-humano-evolucionan-mas-rapido-de-lo-que-se-pensaba-incluso-de-una-generacion-a-otra-descubre-estudio\">las transiciones evolutivas en anatom\u00eda<\/a> y tama\u00f1o corporal\u00bb.<\/p>\n<div class=\"ContentCardEmbedWrapper-hkvhYu kMYDit content-card-embed content-card-embed--stacked\" data-testid=\"ContentCardEmbedWrapper\" readability=\"17.78\">\n<div class=\"ContentCardEmbedImage-bqahne fjmzkP content-card-embed__image\" data-testid=\"ContentCardEmbedImage\"><span class=\"SpanWrapper-kFnjvc eKnjjD responsive-asset\"><picture class=\"ResponsiveImagePicture-jKunQM gjCCFj responsive-image\"><img decoding=\"async\" alt=\"Evoluci\u00f3n concepto.\" loading=\"lazy\" class=\"ResponsiveImageContainer-dkeESL cQPiWi responsive-image__image\" srcset=\"https:\/\/sarmiento24h.com\/wp-content\/uploads\/2026\/03\/un-pequeno-dinosaurio-argentino-parecido-a-un-ave-es-la-piedra-rosetta-para-entender-a-los-teropodos-mas-misteriosos-1.jpg,c_limit\/GettyImages-1328338234.jpg 120w, https:\/\/media.es.wired.com\/photos\/67c63c585a91ac158d594ebc\/master\/w_240,c_limit\/GettyImages-1328338234.jpg 240w, https:\/\/media.es.wired.com\/photos\/67c63c585a91ac158d594ebc\/master\/w_320,c_limit\/GettyImages-1328338234.jpg 320w, https:\/\/media.es.wired.com\/photos\/67c63c585a91ac158d594ebc\/master\/w_640,c_limit\/GettyImages-1328338234.jpg 640w\" sizes=\"100vw\" src=\"https:\/\/sarmiento24h.com\/wp-content\/uploads\/2026\/03\/un-pequeno-dinosaurio-argentino-parecido-a-un-ave-es-la-piedra-rosetta-para-entender-a-los-teropodos-mas-misteriosos.jpg\"><\/picture><\/span><\/div>\n<div class=\"ContentCardEmbedInfo-buyHWH gWLOee\" readability=\"18.626666666667\">\n<div class=\"BaseText-fEwdHD ContentCardEmbedHed-kDKGDs fUtEc dlHXUJ content-card-embed__hed\" data-testid=\"ContentCardEmbedHed\"><a class=\"BaseLink-haTOKm ContentCardEmbedHedLink-iBZsco gAoKdC hhUFQU content-card-embed__hed-link link\" href=\"https:\/\/es.wired.com\/articulos\/es-la-evolucion-capaz-de-evolucionar-un-modelo-computacional-explora-la-enigmatica-hipotesis\" data-testid=\"ContentCardEmbedHedLink\">\u00bfEs la evoluci\u00f3n capaz de evolucionar? Un modelo computacional explora la enigm\u00e1tica hip\u00f3tesis<\/a><\/div>\n<p>Una simulaci\u00f3n arroj\u00f3 evidencia de que la capacidad evolutiva de los organismos se adapta seg\u00fan las condiciones del entorno.<\/p>\n<\/div>\n<\/div>\n<h2>Cu\u00e1l fue el hallazgo<\/h2>\n<p>A partir del an\u00e1lisis, los investigadores observaron que el esp\u00e9cimen era un adulto de unos cuatro a\u00f1os que pesaba algo menos de un kilogramo, lo que lo convierte en uno de los dinosaurios m\u00e1s peque\u00f1os conocidos de Sudam\u00e9rica.<\/p>\n<p>Tambi\u00e9n ten\u00eda extremidades m\u00e1s largas y dientes m\u00e1s grandes que sus parientes posteriores, lo que sugiere que el peque\u00f1o tama\u00f1o del Alvarezsaurus evolucion\u00f3 antes de desarrollar las caracter\u00edsticas anat\u00f3micas (extremidades y dientes m\u00e1s peque\u00f1os) del grupo que se cree que son adaptaciones especializadas a la alimentaci\u00f3n, o m\u00e1s bien a una dieta de hormigas.<\/p>\n<p>\u00ab<strong>Nuestro estudio sugiere que los alvarezsaurios son peque\u00f1os para ser dinosaurios, con especies que van desde el tama\u00f1o de un cuervo hasta el de un humano.<\/strong> El tama\u00f1o corporal parece fluctuar dentro de esta estrecha ventana de tama\u00f1o, sin ning\u00fan patr\u00f3n o tendencia establecida\u00bb, expres\u00f3 Makovicky a la Enfoque Cient\u00edfico de BBC.<\/p>\n<p>Adem\u00e1s, al analizar f\u00f3siles de Alvarezsaurios conservados en colecciones de museos de Norteam\u00e9rica y Europa, <strong>el equipo tambi\u00e9n descubri\u00f3 que estos animales habitaron la mayor\u00eda de los continentes mucho antes de lo esperado, es decir, cuando los continentes a\u00fan estaban unidos en <a href=\"https:\/\/es.wired.com\/articulos\/pangea-ultima-el-proximo-supercontinente-no-tendra-condiciones-para-la-vida-humana\">el supercontinente Pangea.<\/a><\/strong><\/p>\n<p>Por tanto, su distribuci\u00f3n no es el resultado de improbables migraciones oce\u00e1nicas, sino que se debe a la desintegraci\u00f3n gradual a lo largo de decenas de millones de a\u00f1os de las <a href=\"https:\/\/es.wired.com\/articulos\/el-misterioso-vacio-de-mil-millones-de-anos-en-la-historia-de-la-tierra-ya-tiene-explicacion\">masas continentales de la Tierra.<\/a> \u00abDespu\u00e9s de m\u00e1s de 20 a\u00f1os de trabajo, la zona de La Buitrera nos ha proporcionado una visi\u00f3n \u00fanica de los peque\u00f1os dinosaurios y otros vertebrados, como ning\u00fan otro yacimiento de Sudam\u00e9rica\u00bb, concluye Sebasti\u00e1n Apestegu\u00eda, coautor del estudio, quien subraya que su trabajo no ha terminado, ya que seguir\u00e1n estudiando <a href=\"https:\/\/es.wired.com\/articulos\/un-fosil-evidencia-que-los-dinosaurios-tambien-eran-presas-de-mamiferos\">los f\u00f3siles<\/a> de la misma zona donde descubrieron a Alnashetri.<\/p>\n<p><em>Art\u00edculo originalmente publicado en<\/em> <a href=\"https:\/\/www.wired.it\/article\/dalla-patagonia-arriva-fossile-di-dinosauro-racconta-storia-uno-gruppi-teropodi-piu-strani-preistoria\/\">WIRED Italia.<\/a> <em>Adaptado por Alondra.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Un f\u00f3sil de dinosaurio de hace unos&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":64255,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[46],"tags":[],"class_list":["post-64254","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tecnologia"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - 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