{"id":400302,"date":"2026-08-27T20:39:23","date_gmt":"2026-08-27T20:39:23","guid":{"rendered":"http:\/\/6a9076f8440c9aca4faf266b"},"modified":"2026-08-27T20:39:23","modified_gmt":"2026-08-27T20:39:23","slug":"el-eslabon-con-aletas-este-fosil-revela-el-salto-de-los-insectos-prehistoricos-del-agua-a-la-tierra","status":"publish","type":"post","link":"https:\/\/sarmiento24h.com\/?p=400302","title":{"rendered":"El eslab\u00f3n con \u00abaletas\u00bb: este f\u00f3sil revela el salto de los insectos prehist\u00f3ricos del agua a la tierra"},"content":{"rendered":"<p>Al igual que los mam\u00edferos, los insectos pasaron por un largo proceso de evoluci\u00f3n que los llev\u00f3 a establecer las formas que ahora reconocemos. El descubrimiento de un f\u00f3sil de hace 324 millones de a\u00f1os revel\u00f3 c\u00f3mo se ve\u00edan algunos de esos seres antes de parecerse a los que actualmente caminan por el jard\u00edn. Lo m\u00e1s extra\u00f1o est\u00e1 en su abdomen: el animal conservaba una serie de ap\u00e9ndices segmentados, algunos con forma de paleta, compatibles con una vida semiacu\u00e1tica.<\/p>\n<p>El hallazgo, publicado recientemente en <a href=\"https:\/\/www.nature.com\/articles\/s41586-026-10961-2\"><em>Nature<\/em><\/a>, plantea una posibilidad poco considerada en la historia evolutiva de los primeros insectos. Algunos miembros tempranos de su linaje pudieron atravesar una etapa anfibia, similar a la que experimentaron los primeros tetr\u00e1podos, antepasados de los vertebrados terrestres, durante su transici\u00f3n evolutiva entre el agua y la tierra firme.<\/p>\n<h2>Dile hola al <em>Chosha praecursor<\/em><\/h2>\n<p><em>Chosha praecursor<\/em> dif\u00edcilmente pasar\u00eda por un <a href=\"https:\/\/es.wired.com\/articulos\/ojos-de-insectos-inspiran-camaras-fotograficas-del-futuro\">insecto moderno<\/a>. Med\u00eda unos 3.2 cm de largo, aunque alcanzaba casi los 5 si se cuentan las estructuras que sobresal\u00edan de la parte trasera de su cuerpo. Ten\u00eda seis patas para caminar, como los insectos actuales, pero ah\u00ed terminaban las semejanzas m\u00e1s evidentes. De su abdomen sal\u00edan ap\u00e9ndices articulados, una especie de peque\u00f1as extremidades que se repet\u00edan a lo largo de nueve segmentos del cuerpo. Las posteriores eran anchas y ten\u00edan forma de paleta, como diminutos remos que pudieron ayudar al animal a desplazarse en el agua.<\/p>\n<figure class=\"AssetEmbedWrapper-iJvQnD cOWUYC asset-embed\">\n<div class=\"AssetEmbedAssetContainer-fnduJP iaVSwI asset-embed__asset-container\"><span class=\"SpanWrapper-kFnjvc eKnjjD responsive-asset AssetEmbedResponsiveAsset-gaAbQ hXaxHA asset-embed__responsive-asset\"><picture class=\"ResponsiveImagePicture-jKunQM gjCCFj AssetEmbedResponsiveAsset-gaAbQ hXaxHA asset-embed__responsive-asset responsive-image\"><img decoding=\"async\" alt=\"Reconstrucci\u00f3n del f\u00f3sil de Chosha praecursor.\" loading=\"lazy\" class=\"ResponsiveImageContainer-dkeESL cQPiWi responsive-image__image\" srcset=\"https:\/\/media.es.wired.com\/photos\/6a90865ded156c750d3d0abc\/master\/w_120,c_limit\/W020260826314738630963-2.jpg 120w, https:\/\/media.es.wired.com\/photos\/6a90865ded156c750d3d0abc\/master\/w_240,c_limit\/W020260826314738630963-2.jpg 240w, https:\/\/media.es.wired.com\/photos\/6a90865ded156c750d3d0abc\/master\/w_320,c_limit\/W020260826314738630963-2.jpg 320w, https:\/\/media.es.wired.com\/photos\/6a90865ded156c750d3d0abc\/master\/w_640,c_limit\/W020260826314738630963-2.jpg 640w, https:\/\/media.es.wired.com\/photos\/6a90865ded156c750d3d0abc\/master\/w_768,c_limit\/W020260826314738630963-2.jpg 768w, https:\/\/media.es.wired.com\/photos\/6a90865ded156c750d3d0abc\/master\/w_960,c_limit\/W020260826314738630963-2.jpg 960w, https:\/\/media.es.wired.com\/photos\/6a90865ded156c750d3d0abc\/master\/w_1280,c_limit\/W020260826314738630963-2.jpg 1280w, https:\/\/media.es.wired.com\/photos\/6a90865ded156c750d3d0abc\/master\/w_1600,c_limit\/W020260826314738630963-2.jpg 1600w\" sizes=\"100vw\" src=\"https:\/\/media.es.wired.com\/photos\/6a90865ded156c750d3d0abc\/master\/w_1600%2Cc_limit\/W020260826314738630963-2.jpg\"><\/picture><\/span><\/div>\n<div class=\"CaptionWrapper-bpPcvW kzGGxb caption AssetEmbedCaption-eZIMNW gMgneI asset-embed__caption\" data-testid=\"caption-wrapper\" readability=\"6\"><span class=\"BaseText-fEwdHD CaptionText-cQpRdU gZqZYz hbiMYj caption__text\" readability=\"27\"><\/p>\n<p>Reconstrucci\u00f3n del f\u00f3sil de Chosha praecursor.<\/p>\n<p><\/span><span class=\"BaseText-fEwdHD CaptionCredit-cUgOGk fSrqtv hRFzlA caption__credit\">Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences<\/span><\/div>\n<\/figure>\n<p>Su anatom\u00eda tambi\u00e9n inclu\u00eda algunas pistas que permitieron a los investigadores reconocerlo como un pariente temprano de los insectos. En el extremo del cuerpo ten\u00eda un largo filamento, parecido a una cola delgada. Tambi\u00e9n ten\u00eda un ovipositor, una estructura que las hembras utilizan para depositar sus huevos y que en algunos insectos modernos puede verse como una especie de aguja que sobresale del abdomen. En <em>C. praecursor<\/em>, esta extra\u00f1a mezcla parece capturar un momento en el que el caracter\u00edstico cuerpo de los insectos a\u00fan estaba tomando forma.<\/p>\n<h2>Un f\u00f3sil que habla del cap\u00edtulo perdido de los insectos<\/h2>\n<p>Los paleont\u00f3logos llevan d\u00e9cadas intentando reconstruir el surgimiento de los insectos. Saben que est\u00e1n emparentados con los crust\u00e1ceos y que sus antepasados remotos vivieron en el agua. El problema es que faltan p\u00e1ginas enteras de esa historia. Hay un periodo de decenas de millones de a\u00f1os del que apenas existen <a href=\"https:\/\/es.wired.com\/articulos\/descubren-un-primo-del-velociraptor-que-planeaba-como-una-ardilla-voladora-para-cazar-aves-prehistoricas\">f\u00f3siles<\/a> capaces de mostrar c\u00f3mo aquellos animales terminaron adquiriendo el cuerpo de seis patas que hoy reconocemos. Los cient\u00edficos lo llaman la \u201cbrecha de los hex\u00e1podos\u201d.<\/p>\n<hr>\n<div class=\"ContentCardEmbedWrapper-hkvhYu kMYDit content-card-embed content-card-embed--stacked\" data-testid=\"ContentCardEmbedWrapper\" readability=\"16.893258426966\">\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=\"cucaracha y sus genes\" loading=\"lazy\" class=\"ResponsiveImageContainer-dkeESL cQPiWi responsive-image__image\" srcset=\"https:\/\/media.es.wired.com\/photos\/6a3d7ea7455f33dfda74dfc4\/master\/w_120,c_limit\/1473430529 120w, https:\/\/media.es.wired.com\/photos\/6a3d7ea7455f33dfda74dfc4\/master\/w_240,c_limit\/1473430529 240w, https:\/\/media.es.wired.com\/photos\/6a3d7ea7455f33dfda74dfc4\/master\/w_320,c_limit\/1473430529 320w, https:\/\/media.es.wired.com\/photos\/6a3d7ea7455f33dfda74dfc4\/master\/w_640,c_limit\/1473430529 640w, https:\/\/media.es.wired.com\/photos\/6a3d7ea7455f33dfda74dfc4\/master\/w_768,c_limit\/1473430529 768w\" sizes=\"100vw\" src=\"https:\/\/media.es.wired.com\/photos\/6a3d7ea7455f33dfda74dfc4\/master\/w_775%2Cc_limit\/1473430529\"><\/picture><\/span><\/div>\n<div class=\"ContentCardEmbedInfo-buyHWH gWLOee\" readability=\"17.438202247191\">\n<div class=\"BaseText-fEwdHD ContentCardEmbedHed-kDKGDs iUENtL dlHXUJ content-card-embed__hed\" data-testid=\"ContentCardEmbedHed\"><a class=\"BaseLink-haTOKm ContentCardEmbedHedLink-iBZsco ILkR hhUFQU content-card-embed__hed-link link\" href=\"https:\/\/es.wired.com\/articulos\/las-cucarachas-llevan-millones-de-anos-incorporando-genes-ajenos-para-sobrevivir\" data-testid=\"ContentCardEmbedHedLink\">Las cucarachas llevan millones de a\u00f1os incorporando genes ajenos para sobrevivir<\/a><\/div>\n<p>Su genoma conserva rastros de ADN bacteriano que podr\u00eda haber adquirido una funci\u00f3n biol\u00f3gica.<\/p>\n<\/div>\n<\/div>\n<hr>\n<p>El f\u00f3sil de <em>Chosha praecursor<\/em> ayudar\u00e1 a completar ese gran cap\u00edtulo perdido de decenas de millones de a\u00f1os de evoluci\u00f3n. Aunque su valor no radica en su edad, sino en que su cuerpo conserva pistas sobre las transformaciones que pudieron ocurrir durante ese periodo en el que ten\u00edan \u201cuna pata en el agua\u201d. Este esp\u00e9cimen parece mostrar un cuerpo dise\u00f1ado para vivir al estilo anfibio, aunque todav\u00eda hacen falta m\u00e1s pruebas para confirmarlo.<\/p>\n<p>\u201cLos nuevos f\u00f3siles sugieren que la reducci\u00f3n de los ap\u00e9ndices abdominales fue una innovaci\u00f3n evolutiva clave para la adaptaci\u00f3n terrestre. Estas estructuras se simplificaron progresivamente a medida que se perdieron los ap\u00e9ndices de nataci\u00f3n de los antepasados de los crust\u00e1ceos, lo que finalmente produjo la organizaci\u00f3n corporal que se ve en los insectos modernos\u201d, dice un <a data-offer-url=\"https:\/\/english.cas.cn\/newsroom\/headlines\/202608\/t20260826_1188824.shtml\" class=\"external-link\" data-event-click=\"{&quot;element&quot;:&quot;ExternalLink&quot;,&quot;outgoingURL&quot;:&quot;https:\/\/english.cas.cn\/newsroom\/headlines\/202608\/t20260826_1188824.shtml&quot;}\" href=\"https:\/\/english.cas.cn\/newsroom\/headlines\/202608\/t20260826_1188824.shtml\" rel=\"nofollow noopener\" target=\"_blank\">comunicado<\/a> de prensa de la Academia China de Ciencias.<\/p>\n<p>La hip\u00f3tesis que sugieren los autores es que, conforme estos animales se adaptaron a la vida terrestre, aquellos ap\u00e9ndices abdominales fueron reduci\u00e9ndose hasta pr\u00e1cticamente desaparecer. Los insectos modernos conservaron seis patas, todas en el t\u00f3rax, y dejaron atr\u00e1s las peque\u00f1as extremidades que todav\u00eda llevaba <em>Chosha praecursor<\/em>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Al igual que los mam\u00edferos, los insectos&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":400303,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_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},"jetpack_post_was_ever_published":false},"categories":[46],"tags":[],"class_list":["post-400302","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tecnologia"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.1 - 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