{"id":17480,"date":"2026-02-23T10:05:07","date_gmt":"2026-02-23T09:05:07","guid":{"rendered":"https:\/\/clientes.munecarusa.com\/mp\/?p=17480"},"modified":"2026-02-24T13:20:01","modified_gmt":"2026-02-24T12:20:01","slug":"crassigyrinus","status":"publish","type":"post","link":"https:\/\/clientes.munecarusa.com\/mp\/crassigyrinus\/","title":{"rendered":"Crassigyrinus"},"content":{"rendered":"<p>[et_pb_section fb_built=\u00bb1&#8243; custom_padding_last_edited=\u00bboff|phone\u00bb disabled_on=\u00bboff|off|off\u00bb admin_label=\u00bbFondo Men\u00fa\u00bb _builder_version=\u00bb4.27.2&#8243; background_color=\u00bb#ff6600&#8243; custom_margin=\u00bb0px||20px||false|false\u00bb custom_padding=\u00bb0px||0px||true|false\u00bb collapsed=\u00bbon\u00bb global_colors_info=\u00bb{}\u00bb][\/et_pb_section][et_pb_section fb_built=\u00bb1&#8243; custom_padding_last_edited=\u00bbon|phone\u00bb disabled_on=\u00bboff|off|off\u00bb admin_label=\u00bbIntroducci\u00f3n\u00bb _builder_version=\u00bb4.27.2&#8243; background_enable_color=\u00bboff\u00bb custom_margin_last_edited=\u00bboff|phone\u00bb custom_padding=\u00bb||0px||false|false\u00bb custom_padding_tablet=\u00bb27px||0px||false|false\u00bb custom_padding_phone=\u00bb37px||||false|false\u00bb collapsed=\u00bbon\u00bb global_colors_info=\u00bb{}\u00bb][et_pb_row make_equal=\u00bbon\u00bb custom_padding_last_edited=\u00bbon|phone\u00bb _builder_version=\u00bb4.27.2&#8243; background_size=\u00bbinitial\u00bb background_position=\u00bbtop_left\u00bb background_repeat=\u00bbrepeat\u00bb custom_margin=\u00bb||||false|false\u00bb custom_padding=\u00bb||0px||false|false\u00bb custom_padding_tablet=\u00bb||0px||false|false\u00bb custom_padding_phone=\u00bb||10px||false|false\u00bb collapsed=\u00bboff\u00bb global_colors_info=\u00bb{}\u00bb][et_pb_column type=\u00bb4_4&#8243; _builder_version=\u00bb4.16&#8243; custom_padding=\u00bb|||\u00bb global_colors_info=\u00bb{}\u00bb custom_padding__hover=\u00bb|||\u00bb][et_pb_post_title meta=\u00bboff\u00bb featured_image=\u00bboff\u00bb _builder_version=\u00bb4.27.5&#8243; _module_preset=\u00bbdefault\u00bb title_font=\u00bb|600||on|||||\u00bb title_text_align=\u00bbcenter\u00bb title_text_color=\u00bb#000000&#8243; title_font_size=\u00bb70px\u00bb title_letter_spacing=\u00bb1px\u00bb custom_margin=\u00bb||10px||false|false\u00bb animation_style=\u00bbslide\u00bb animation_direction=\u00bbbottom\u00bb title_font_size_tablet=\u00bb50px\u00bb title_font_size_phone=\u00bb20px\u00bb title_font_size_last_edited=\u00bbon|phone\u00bb title_text_shadow_style=\u00bbpreset1&#8243; global_colors_info=\u00bb{}\u00bb][\/et_pb_post_title][et_pb_text content_last_edited=\u00bboff|phone\u00bb _builder_version=\u00bb4.27.5&#8243; header_4_font=\u00bb|700||on|||||\u00bb header_4_text_align=\u00bbcenter\u00bb header_4_text_color=\u00bb#ff6600&#8243; header_4_font_size=\u00bb30px\u00bb header_4_line_height=\u00bb1.4em\u00bb background_size=\u00bbinitial\u00bb background_position=\u00bbtop_left\u00bb background_repeat=\u00bbrepeat\u00bb text_orientation=\u00bbjustified\u00bb animation_style=\u00bbzoom\u00bb text_font_size_last_edited=\u00bboff|phone\u00bb text_line_height_last_edited=\u00bboff|phone\u00bb header_4_font_size_tablet=\u00bb22px\u00bb header_4_font_size_phone=\u00bb11px\u00bb header_4_font_size_last_edited=\u00bbon|phone\u00bb header_4_text_shadow_style=\u00bbpreset1&#8243; 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text_text_color=\u00bb#444444&#8243; background_size=\u00bbinitial\u00bb background_position=\u00bbtop_left\u00bb background_repeat=\u00bbrepeat\u00bb text_orientation=\u00bbjustified\u00bb text_font_size_tablet=\u00bb16px\u00bb text_font_size_phone=\u00bb14px\u00bb text_font_size_last_edited=\u00bbon|phone\u00bb text_line_height_tablet=\u00bb1.7em\u00bb text_line_height_phone=\u00bb1.6em\u00bb text_line_height_last_edited=\u00bbon|phone\u00bb global_colors_info=\u00bb{}\u00bb]<\/p>\n<h2 style=\"text-align: justify;\"><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-4309 alignleft\" src=\"https:\/\/clientes.munecarusa.com\/mp\/wp-content\/uploads\/2025\/01\/margen-huella.png\" alt=\"Crassigyrinus\" width=\"30\" height=\"50\" \/><\/h2>\n<p>Crassigyrinus es uno de los tetr\u00e1podos m\u00e1s enigm\u00e1ticos y desconcertantes del Carbon\u00edfero, un depredador acu\u00e1tico que desaf\u00eda las categor\u00edas tradicionales de la evoluci\u00f3n temprana de los vertebrados. Vivi\u00f3 hace unos 330 millones de a\u00f1os, durante el Carbon\u00edfero Inferior, en lo que hoy es Escocia y Norteam\u00e9rica. Su nombre significa \u201crenacuajo grueso\u201d, una descripci\u00f3n sorprendentemente acertada para un animal cuyo cuerpo parec\u00eda detenido en un estado larvario perpetuo: patas diminutas, tronco robusto, cola poderosa y un cr\u00e1neo desproporcionadamente grande. Crassigyrinus representa un experimento evolutivo \u00fanico, un tetr\u00e1podo que, en lugar de avanzar hacia la vida terrestre, volvi\u00f3 al agua y se especializ\u00f3 en un estilo de vida completamente acu\u00e1tico.[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=\u00bb2_3,1_3&#8243; admin_label=\u00bbFila\u00bb _builder_version=\u00bb4.27.5&#8243; _module_preset=\u00bbdefault\u00bb custom_margin=\u00bb||||false|false\u00bb custom_padding=\u00bb0px||10px||false|false\u00bb global_colors_info=\u00bb{}\u00bb][et_pb_column type=\u00bb2_3&#8243; _builder_version=\u00bb4.27.5&#8243; _module_preset=\u00bbdefault\u00bb animation_style=\u00bbzoom\u00bb sticky_limit_top=\u00bbrow\u00bb global_colors_info=\u00bb{}\u00bb][et_pb_image src=\u00bbhttps:\/\/clientes.munecarusa.com\/mp\/wp-content\/uploads\/2026\/02\/Crassigyrinus.webp\u00bb alt=\u00bbCrassigyrinus\u00bb show_in_lightbox=\u00bbon\u00bb use_overlay=\u00bbon\u00bb overlay_icon_color=\u00bb#ff6600&#8243; hover_overlay_color=\u00bbrgba(255,102,0,0.2)\u00bb align=\u00bbcenter\u00bb force_fullwidth=\u00bbon\u00bb _builder_version=\u00bb4.27.5&#8243; _module_preset=\u00bbdefault\u00bb custom_margin=\u00bb25px||||false|false\u00bb sticky_limit_top=\u00bbcolumn\u00bb sticky_limit_bottom=\u00bbcolumn\u00bb global_colors_info=\u00bb{}\u00bb][\/et_pb_image][et_pb_code disabled_on=\u00bboff|off|off\u00bb admin_label=\u00bbMe gusta\u00bb _builder_version=\u00bb4.27.5&#8243; _module_preset=\u00bbdefault\u00bb custom_margin=\u00bb-20px||||false|false\u00bb sticky_limit_bottom=\u00bbcolumn\u00bb global_colors_info=\u00bb{}\u00bb]<div class=\"et_social_networks et_social_1col et_social_slide et_social_rectangle et_social_left et_social_withcounts et_social_shortcode_0 et_social_mobile_on et_social_withnetworknames et_social_outer_dark\">\n\t\t\t\t\t<style type=\"text\/css\">.et_monarch .et_social_shortcode_0 li,.et_monarch .et_social_shortcode_0.et_social_circle ul li i.et_social_icon { background: #ff0000; } .et_monarch .et_social_shortcode_0.et_social_rounded .et_social_icons_container li:hover, .et_monarch .et_social_shortcode_0.et_social_rectangle .et_social_icons_container li:hover, .et_monarch .et_social_shortcode_0.et_social_circle .et_social_icons_container li:hover i.et_social_icon { background: #660000 !important; } .et_monarch .et_social_shortcode_0 .et_social_icons_container li:hover .et_social_icon, .et_monarch .et_social_shortcode_0 .et_social_networks .et_social_icons_container li:hover .et_social_network_label, .et_monarch .et_social_shortcode_0 .et_social_icons_container li:hover .et_social_networkname, .et_monarch .et_social_rounded.et_social_shortcode_0 .et_social_icons_container li:hover .et_social_count, .et_monarch .et_social_rectangle.et_social_shortcode_0 .et_social_icons_container li:hover .et_social_count { color: #ffffff !important; }<\/style>\n\t\t\t\t\t\n\t\t\t\t\t<ul class=\"et_social_icons_container\"><li class=\"et_social_like\">\n\t\t\t\t\t\t<a href=\"#\" class=\"et_social_follow\" data-social_name=\"like\" data-social_type=\"like\" data-post_id=\"0\" target=\"_blank\">\n\t\t\t\t\t\t\t<i class=\"et_social_icon et_social_icon_like\"><\/i>\n\t\t\t\t\t\t\t<div class=\"et_social_network_label\"><div class=\"et_social_networkname\">Me gusta<\/div><div class=\"et_social_count\">\n\t\t\t\t\t\t<span>0<\/span>\n\t\t\t\t\t\t<span class=\"et_social_count_label\">Likes<\/span>\n\t\t\t\t\t<\/div><\/div>\n\t\t\t\t\t\t\t<span class=\"et_social_overlay\"><\/span>\n\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/li><\/ul>\n\t\t\t\t<\/div>[\/et_pb_code][et_pb_post_title meta=\u00bboff\u00bb featured_image=\u00bboff\u00bb _builder_version=\u00bb4.27.5&#8243; _module_preset=\u00bbdefault\u00bb title_font=\u00bb|600||on|||||\u00bb title_text_align=\u00bbcenter\u00bb title_text_color=\u00bb#000000&#8243; title_font_size=\u00bb35px\u00bb title_letter_spacing=\u00bb1px\u00bb custom_margin=\u00bb||0px||false|false\u00bb animation_direction=\u00bbbottom\u00bb sticky_limit_bottom=\u00bbcolumn\u00bb title_font_size_tablet=\u00bb30px\u00bb title_font_size_phone=\u00bb20px\u00bb title_font_size_last_edited=\u00bbon|desktop\u00bb global_colors_info=\u00bb{}\u00bb][\/et_pb_post_title][et_pb_text content_last_edited=\u00bboff|phone\u00bb disabled_on=\u00bboff|off|off\u00bb admin_label=\u00bbSubt\u00edtulo\u00bb _builder_version=\u00bb4.27.5&#8243; header_2_font=\u00bb||||||||\u00bb header_3_font=\u00bb|700||on|||||\u00bb header_3_text_align=\u00bbcenter\u00bb header_3_text_color=\u00bb#444444&#8243; header_3_font_size=\u00bb30px\u00bb header_4_font=\u00bb||||||||\u00bb background_size=\u00bbinitial\u00bb background_position=\u00bbtop_left\u00bb background_repeat=\u00bbrepeat\u00bb sticky_limit_bottom=\u00bbcolumn\u00bb hover_enabled=\u00bb0&#8243; 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_module_preset=\u00bbdefault\u00bb global_colors_info=\u00bb{}\u00bb]Era: Paleozoica<br \/>\nPeriodo: Carbon\u00edfero[\/et_pb_accordion_item][et_pb_accordion_item title=\u00bbDescubridor\u00bb _builder_version=\u00bb4.27.5&#8243; _module_preset=\u00bbdefault\u00bb global_colors_info=\u00bb{}\u00bb open=\u00bboff\u00bb]Watson, 1926[\/et_pb_accordion_item][et_pb_accordion_item title=\u00bbOrigen\u00bb _builder_version=\u00bb4.27.5&#8243; _module_preset=\u00bbdefault\u00bb global_colors_info=\u00bb{}\u00bb open=\u00bboff\u00bb]Escocia[\/et_pb_accordion_item][et_pb_accordion_item title=\u00bbGrupo\u00bb _builder_version=\u00bb4.27.5&#8243; _module_preset=\u00bbdefault\u00bb global_colors_info=\u00bb{}\u00bb open=\u00bboff\u00bb]Reptil[\/et_pb_accordion_item][et_pb_accordion_item title=\u00bbFamilia\u00bb _builder_version=\u00bb4.27.5&#8243; _module_preset=\u00bbdefault\u00bb global_colors_info=\u00bb{}\u00bb open=\u00bboff\u00bb]Crassigyrinidae[\/et_pb_accordion_item][\/et_pb_accordion][et_pb_counters bar_bg_color=\u00bb#ff6600&#8243; _builder_version=\u00bb4.27.5&#8243; _module_preset=\u00bbdefault\u00bb title_font=\u00bb|700|||||||\u00bb title_text_color=\u00bb#000000&#8243; title_font_size=\u00bb22px\u00bb title_letter_spacing=\u00bb1px\u00bb percent_font=\u00bb|600|||||||\u00bb percent_text_color=\u00bb#FFFFFF\u00bb percent_font_size=\u00bb18px\u00bb percent_letter_spacing=\u00bb1px\u00bb custom_padding=\u00bb15px||15px||true|false\u00bb sticky_limit_bottom=\u00bbcolumn\u00bb title_font_size_tablet=\u00bb19px\u00bb title_font_size_phone=\u00bb16px\u00bb title_font_size_last_edited=\u00bbon|phone\u00bb percent_font_size_tablet=\u00bb16px\u00bb percent_font_size_phone=\u00bb14px\u00bb percent_font_size_last_edited=\u00bbon|phone\u00bb global_colors_info=\u00bb{}\u00bb][et_pb_counter percent=\u00bb44&#8243; _builder_version=\u00bb4.27.5&#8243; _module_preset=\u00bbdefault\u00bb global_colors_info=\u00bb{}\u00bb bar_background_color_default=\u00bb#ff6600&#8243; use_percentages=\u00bbon\u00bb]Agresividad[\/et_pb_counter][\/et_pb_counters][et_pb_number_counter title=\u00bbMillones de A\u00f1os\u00bb number=\u00bb420&#8243; 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_module_preset=\u00bbdefault\u00bb custom_button=\u00bbon\u00bb button_text_size=\u00bb22px\u00bb button_text_color=\u00bb#FFFFFF\u00bb button_bg_color=\u00bb#ff6600&#8243; button_border_radius=\u00bb0px\u00bb button_font=\u00bb|700|||||||\u00bb button_icon=\u00bb&#x24;||divi||400&#8243; custom_margin=\u00bb0px||||false|false\u00bb custom_padding=\u00bb15px||15px||true|false\u00bb sticky_limit_top=\u00bbcolumn\u00bb sticky_limit_bottom=\u00bbcolumn\u00bb button_text_size_tablet=\u00bb19px\u00bb button_text_size_phone=\u00bb16px\u00bb button_text_size_last_edited=\u00bbon|phone\u00bb button_icon_last_edited=\u00bboff|desktop\u00bb button_on_hover_phone=\u00bbon\u00bb button_on_hover_last_edited=\u00bboff|phone\u00bb custom_css_main_element=\u00bbwidth:100%;\u00bb global_colors_info=\u00bb{}\u00bb button_text_color__hover_enabled=\u00bboff|desktop\u00bb button_bg_color__hover_enabled=\u00bbon|hover\u00bb button_bg_color__hover=\u00bb#660000&#8243; button_bg_enable_color__hover=\u00bbon\u00bb][\/et_pb_button][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=\u00bb4.27.5&#8243; _module_preset=\u00bbdefault\u00bb custom_margin=\u00bb||||false|false\u00bb custom_padding=\u00bb30px||||false|false\u00bb global_colors_info=\u00bb{}\u00bb][et_pb_column type=\u00bb4_4&#8243; _builder_version=\u00bb4.27.5&#8243; _module_preset=\u00bbdefault\u00bb animation_style=\u00bbzoom\u00bb global_colors_info=\u00bb{}\u00bb][et_pb_text content_last_edited=\u00bboff|desktop\u00bb disabled_on=\u00bboff|off|off\u00bb admin_label=\u00bbTexto\u00bb _builder_version=\u00bb4.27.5&#8243; text_text_color=\u00bb#444444&#8243; background_size=\u00bbinitial\u00bb background_position=\u00bbtop_left\u00bb background_repeat=\u00bbrepeat\u00bb text_orientation=\u00bbjustified\u00bb text_font_size_tablet=\u00bb16px\u00bb text_font_size_phone=\u00bb14px\u00bb text_font_size_last_edited=\u00bbon|phone\u00bb text_line_height_tablet=\u00bb1.7em\u00bb text_line_height_phone=\u00bb1.6em\u00bb text_line_height_last_edited=\u00bbon|phone\u00bb global_colors_info=\u00bb{}\u00bb]El cuerpo de Crassigyrinus med\u00eda alrededor de dos metros de longitud, aunque su aspecto general era m\u00e1s parecido al de un pez robusto que al de un anfibio t\u00edpico. Su tronco era ancho y musculoso, dise\u00f1ado para generar potentes ondulaciones laterales que le permit\u00edan desplazarse con rapidez en aguas turbias. La cola, larga y comprimida lateralmente, actuaba como un propulsor eficiente, similar al de los peces depredadores. Pero lo m\u00e1s llamativo eran sus extremidades: reducidas hasta el extremo, casi vestigiales, incapaces de sostener su peso en tierra. Estas patas diminutas indican que Crassigyrinus no caminaba; nadaba, emboscaba y cazaba exclusivamente en el agua.<\/p>\n<p>El cr\u00e1neo de Crassigyrinus es una de las piezas anat\u00f3micas m\u00e1s impresionantes del Carbon\u00edfero. Era grande, macizo y alargado, con mand\u00edbulas poderosas equipadas con dientes largos, curvados y afilados, perfectos para sujetar presas resbaladizas. La forma del cr\u00e1neo sugiere una musculatura mandibular muy desarrollada, capaz de generar una mordida fuerte y r\u00e1pida. Sus ojos, situados en posici\u00f3n lateral, indican que depend\u00eda de la visi\u00f3n para detectar movimiento en aguas poco profundas, aunque tambi\u00e9n es posible que utilizara la l\u00ednea lateral \u2014como los peces\u2014 para percibir vibraciones. Todo en su cabeza apunta a un depredador especializado, adaptado a emboscar peces, anfibios y otros animales acu\u00e1ticos.<\/p>\n<p>La anatom\u00eda de Crassigyrinus plantea un enigma evolutivo fascinante. Aunque era un tetr\u00e1podo \u2014es decir, descendiente de los primeros vertebrados que conquistaron la tierra firme\u2014, su cuerpo muestra una reversi\u00f3n evolutiva hacia un estilo de vida acu\u00e1tico. Sus extremidades reducidas, su columna vertebral reforzada y su cr\u00e1neo hidrodin\u00e1mico indican que hab\u00eda abandonado por completo la locomoci\u00f3n terrestre. Este fen\u00f3meno, conocido como secundaria adaptaci\u00f3n al medio acu\u00e1tico, tambi\u00e9n se observa en otros grupos posteriores, como los cet\u00e1ceos o los reptiles marinos del Mesozoico. Crassigyrinus es uno de los primeros ejemplos de esta tendencia en la historia de los vertebrados.<\/p>\n<p>El entorno donde vivi\u00f3 Crassigyrinus era un paisaje dominado por r\u00edos lentos, pantanos profundos y bosques densos de licopodios gigantes, helechos arborescentes y colas de caballo. En estos ecosistemas, el agua era oscura, rica en materia org\u00e1nica y a menudo poco oxigenada. Crassigyrinus prosperaba en este ambiente, donde su cuerpo hidrodin\u00e1mico y su potente cola le permit\u00edan moverse con rapidez entre la vegetaci\u00f3n sumergida. Su estilo de caza probablemente combinaba la emboscada con la persecuci\u00f3n corta: permanec\u00eda inm\u00f3vil entre ra\u00edces y troncos sumergidos, esperando a que una presa se acercara lo suficiente para lanzar un ataque fulminante.<\/p>\n<p>La ecolog\u00eda de Crassigyrinus lo sit\u00faa como un depredador de nivel medio-alto en los ecosistemas del Carbon\u00edfero Inferior. No era tan grande como algunos peces depredadores contempor\u00e1neos, pero su combinaci\u00f3n de fuerza, velocidad y mordida lo convert\u00eda en un cazador formidable. Sus presas inclu\u00edan peces \u00f3seos, peces cartilaginosos primitivos, otros anfibios y posiblemente juveniles de tetr\u00e1podos m\u00e1s grandes. Su cuerpo robusto y su cr\u00e1neo poderoso indican que pod\u00eda capturar presas relativamente grandes en relaci\u00f3n con su tama\u00f1o.<\/p>\n<p>Desde el punto de vista evolutivo, Crassigyrinus pertenece a un linaje de tetr\u00e1podos primitivos cuya posici\u00f3n exacta sigue siendo objeto de debate. Algunos estudios lo sit\u00faan cerca de los embolomeros, un grupo de reptiliomorfos acu\u00e1ticos y alargados; otros lo consideran parte de un linaje m\u00e1s basal, separado de los grupos que dieron origen a los anfibios modernos y a los amniotas. Lo que est\u00e1 claro es que Crassigyrinus representa una rama lateral, un experimento evolutivo que no dej\u00f3 descendientes directos pero que demuestra la enorme diversidad de formas que los tetr\u00e1podos exploraron durante el Carbon\u00edfero.<\/p>\n<p>El registro f\u00f3sil de Crassigyrinus es fragmentario pero revelador. Los primeros restos fueron descubiertos en Escocia, en dep\u00f3sitos de agua dulce del Carbon\u00edfero Inferior. Durante d\u00e9cadas, la reconstrucci\u00f3n del animal fue un desaf\u00edo debido a la naturaleza incompleta de los f\u00f3siles. Sin embargo, nuevos hallazgos y t\u00e9cnicas modernas de reconstrucci\u00f3n digital han permitido obtener una imagen m\u00e1s precisa de su anatom\u00eda. Estos estudios han confirmado que Crassigyrinus no era un anfibio torpe y primitivo, sino un depredador altamente especializado, adaptado a un nicho ecol\u00f3gico muy concreto.<\/p>\n<p>En conjunto, Crassigyrinus es uno de los animales m\u00e1s intrigantes del Carbon\u00edfero: un tetr\u00e1podo que renunci\u00f3 a la tierra firme para convertirse en un cazador acu\u00e1tico, con un cuerpo poderoso, extremidades reducidas y un cr\u00e1neo dise\u00f1ado para la depredaci\u00f3n. Su historia evolutiva, su anatom\u00eda extrema y su papel ecol\u00f3gico lo convierten en una pieza esencial para comprender la diversidad y la experimentaci\u00f3n evolutiva de los primeros vertebrados terrestres. 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patas diminutas, cr\u00e1neo enorme y un cuerpo adaptado a la caza&#8230;<\/p>\n","protected":false},"author":1,"featured_media":17483,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[20],"tags":[],"class_list":["post-17480","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-fauna-del-carbonifero"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Crassigyrinus | El depredador acu\u00e1tico m\u00e1s extra\u00f1o de su \u00e9poca<\/title>\n<meta name=\"description\" content=\"Crassigyrinus fue un tetr\u00e1podo acu\u00e1tico, con patas diminutas, cr\u00e1neo enorme y un cuerpo adaptado a la caza.\" \/>\n<meta name=\"robots\" content=\"noindex, follow, max-snippet:-1, max-image-preview:large, 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