{"id":9254,"date":"2025-11-26T12:47:12","date_gmt":"2025-11-26T11:47:12","guid":{"rendered":"https:\/\/clientes.munecarusa.com\/mp\/?p=9254"},"modified":"2026-02-18T14:20:21","modified_gmt":"2026-02-18T13:20:21","slug":"aegirocassis","status":"publish","type":"post","link":"https:\/\/clientes.munecarusa.com\/mp\/aegirocassis\/","title":{"rendered":"Aegirocassis"},"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 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=\u00bb4.27.4&#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=\u00bb4.27.4&#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; global_colors_info=\u00bb{}\u00bb header_4_text_color__hover_enabled=\u00bboff|hover\u00bb text_text_color__hover_enabled=\u00bboff|desktop\u00bb]<\/p>\n<h4>Roy, Daley &#038; Briggs, 2015<\/h4>\n<p>[\/et_pb_text][et_pb_divider color=\u00bb#999999&#8243; admin_label=\u00bbSeparador\u00bb _builder_version=\u00bb4.27.0&#8243; _module_preset=\u00bbdefault\u00bb custom_margin=\u00bb-20px||0px||false|false\u00bb custom_padding=\u00bb||||false|false\u00bb animation_style=\u00bbslide\u00bb global_colors_info=\u00bb{}\u00bb][\/et_pb_divider][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=\u00bb4.27.2&#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=\u00bb4_4&#8243; _builder_version=\u00bb4.27.2&#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 hover_enabled=\u00bb0&#8243; 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 sticky_enabled=\u00bb0&#8243;]<\/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=\"Astraspis\" width=\"30\" height=\"50\" \/><\/h2>\n<p>Aegirocassis es un g\u00e9nero extinto de radiodonto filtrador perteneciente a la familia Hurdiidae que vivi\u00f3 hace aproximadamente 480 millones de a\u00f1os, durante el inicio del Ordov\u00edcico, en un momento en el que los ecosistemas marinos experimentaban una diversificaci\u00f3n extraordinaria. Aegirocassis representa uno de los ejemplos m\u00e1s espectaculares de gigantismo temprano entre los radiodontos y, al mismo tiempo, uno de los primeros casos conocidos de alimentaci\u00f3n por filtraci\u00f3n en un animal de gran tama\u00f1o. Solo se conoce una especie dentro del g\u00e9nero, Aegirocassis benmoulai. 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_module_preset=\u00bbdefault\u00bb custom_margin=\u00bb-20px||||false|false\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=\u00bb4.27.4&#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 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=\u00bb4.27.4&#8243; 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_module_preset=\u00bbdefault\u00bb hover_enabled=\u00bb0&#8243; global_colors_info=\u00bb{}\u00bb theme_builder_area=\u00bbpost_content\u00bb sticky_enabled=\u00bb0&#8243;]Era: Paleozoica<br \/>\nPeriodo: Ordov\u00edcico[\/et_pb_accordion_item][et_pb_accordion_item title=\u00bbDescubridor\u00bb _builder_version=\u00bb4.27.5&#8243; _module_preset=\u00bbdefault\u00bb hover_enabled=\u00bb0&#8243; global_colors_info=\u00bb{}\u00bb theme_builder_area=\u00bbpost_content\u00bb open=\u00bboff\u00bb sticky_enabled=\u00bb0&#8243;]Roy, Daley &#038; Briggs, 2015[\/et_pb_accordion_item][et_pb_accordion_item title=\u00bbOrigen\u00bb _builder_version=\u00bb4.27.5&#8243; _module_preset=\u00bbdefault\u00bb hover_enabled=\u00bb0&#8243; global_colors_info=\u00bb{}\u00bb theme_builder_area=\u00bbpost_content\u00bb open=\u00bboff\u00bb sticky_enabled=\u00bb0&#8243;]Marruecos[\/et_pb_accordion_item][et_pb_accordion_item title=\u00bbGrupo\u00bb _builder_version=\u00bb4.27.2&#8243; _module_preset=\u00bbdefault\u00bb global_colors_info=\u00bb{}\u00bb theme_builder_area=\u00bbpost_content\u00bb open=\u00bboff\u00bb]Invertebrado[\/et_pb_accordion_item][et_pb_accordion_item title=\u00bbFamilia\u00bb _builder_version=\u00bb4.27.5&#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 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 animation_style=\u00bbzoom\u00bb hover_enabled=\u00bb0&#8243; global_colors_info=\u00bb{}\u00bb sticky_enabled=\u00bb0&#8243;][et_pb_column type=\u00bb4_4&#8243; _builder_version=\u00bb4.27.2&#8243; _module_preset=\u00bbdefault\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 hover_enabled=\u00bb0&#8243; 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 theme_builder_area=\u00bbpost_content\u00bb sticky_enabled=\u00bb0&#8243;]Los f\u00f3siles de Aegirocassis fueron descubiertos en la Formaci\u00f3n Fezouata, en Marruecos, por el coleccionista de f\u00f3siles Mohamed Ben Moula, cuyo apellido qued\u00f3 inmortalizado en el nombre de la especie. Tras el hallazgo, el paleont\u00f3logo Peter Van Roy, de la Universidad de Ghent, llev\u00f3 a cabo la excavaci\u00f3n y recuper\u00f3 un esp\u00e9cimen excepcionalmente bien preservado en tres dimensiones, algo extremadamente raro en radiodontos, cuyos f\u00f3siles suelen encontrarse aplastados en las rocas.<\/p>\n<p>Aegirocassis fue descrito como el f\u00f3sil m\u00e1s antiguo conocido de un animal de gran tama\u00f1o que se alimentaba por filtraci\u00f3n, lo que lo convierte en un hito evolutivo. Cuando estaba vivo, Aegirocassis era el segundo animal m\u00e1s grande del planeta, solo superado por algunos de los enormes nautiloideos ortoc\u00f3nicos del Ordov\u00edcico. Seg\u00fan la descripci\u00f3n publicada en la revista Nature, Aegirocassis med\u00eda m\u00e1s de dos metros de longitud, una cifra impresionante para un radiodonto y que lo sit\u00faa muy por encima del tama\u00f1o de sus parientes c\u00e1mbricos como Anomalocaris o Hurdia. Este tama\u00f1o colosal, combinado con su anatom\u00eda especializada, sugiere que Aegirocassis ocupaba un nicho ecol\u00f3gico completamente distinto al de los radiodontos depredadores del C\u00e1mbrico.<\/p>\n<p>Al igual que otros h\u00fardidos, Aegirocassis pose\u00eda tres grandes escleritos cef\u00e1licos. El esclerito dorsal, o elemento H, ten\u00eda forma de gota y era tan largo que ocupaba aproximadamente la mitad de la longitud total del cuerpo. La l\u00ednea media dorsal del esclerito estaba claramente elevada en el extremo anterior, lo que le daba una apariencia robusta y aerodin\u00e1mica. Ambos bordes del caparaz\u00f3n dorsal presentaban proyecciones triangulares orientadas hacia abajo, que probablemente serv\u00edan como puntos de conexi\u00f3n con los caparazones izquierdo y derecho situados por debajo. Estos caparazones laterales, o elementos P, eran el\u00edpticos y cada uno presentaba un surco en su extremo anterior que se un\u00eda con la proyecci\u00f3n triangular del esclerito dorsal. La superficie de los caparazones laterales mostraba una cresta distintiva a lo largo de la l\u00ednea media, as\u00ed como en el extremo anterior, lo que sugiere una estructura reforzada que habr\u00eda contribuido a la estabilidad hidrodin\u00e1mica de Aegirocassis.<\/p>\n<p>Los ap\u00e9ndices frontales de Aegirocassis med\u00edan alrededor de 12 cent\u00edmetros de longitud y estaban divididos en siete segmentos. En la superficie ventral del primer segmento hab\u00eda un endito m\u00e1s peque\u00f1o que los dem\u00e1s, mientras que los segmentos segundo a quinto presentaban cinco enditos alargados. Cada endito estaba cubierto por unas 80 ramas largas en forma de cerdas, tambi\u00e9n llamadas espinas auxiliares, que se divid\u00edan en la base en articulaciones redondeadas. Cada una de estas ramas pose\u00eda dos hileras de cilios en forma de V en ambos bordes. Esta compleja estructura filtradora permit\u00eda a Aegirocassis capturar part\u00edculas diminutas del agua, desde plancton hasta materia org\u00e1nica en suspensi\u00f3n. El primer segmento del ap\u00e9ndice ten\u00eda una estructura similar, aunque era m\u00e1s corto, lo que sugiere una funci\u00f3n complementaria en el proceso de filtraci\u00f3n.<\/p>\n<p>Aunque se han realizado reconstrucciones completas del cuerpo de Aegirocassis bas\u00e1ndose en radiodontos estrechamente relacionados, la morfolog\u00eda exacta de los ojos y de la boca \u2014el cono oral\u2014 sigue siendo desconocida, ya que no se han encontrado f\u00f3siles que preserven estas estructuras. Sin embargo, dado que Aegirocassis se alimentaba por filtraci\u00f3n, es probable que no necesitara una visi\u00f3n especialmente desarrollada ni un aparato bucal robusto, a diferencia de los radiodontos depredadores del C\u00e1mbrico.<\/p>\n<p>La excepcional conservaci\u00f3n tridimensional del f\u00f3sil de Aegirocassis ha permitido comprender mejor la naturaleza de las aletas troncales de los radiodontos. Cada segmento del tronco de Aegirocassis pose\u00eda un par de aletas ventrales y un par de aletas dorsales. Los detalles observados en el esp\u00e9cimen llevaron a revisar la interpretaci\u00f3n de las aletas en otros radiodontos y, sobre todo, a concluir que el par ventral es hom\u00f3logo a los end\u00f3podos de los artr\u00f3podos \u2014las ramas internas parecidas a patas\u2014 y a las extremidades de los lob\u00f3podos, mientras que el par dorsal es hom\u00f3logo a las aletas de los lob\u00f3podos branquiales y a los ex\u00edtos \u2014ramas externas similares a branquias\u2014 de las patas birr\u00e1meas de los artr\u00f3podos. Esta reinterpretaci\u00f3n convierte a Aegirocassis en una pieza clave para comprender la evoluci\u00f3n temprana de las extremidades artr\u00f3podas y la transici\u00f3n entre los lob\u00f3podos y los euartr\u00f3podos.<\/p>\n<p>Aegirocassis, con su tama\u00f1o gigantesco, su anatom\u00eda filtradora altamente especializada y su importancia evolutiva, representa uno de los organismos m\u00e1s extraordinarios del Ordov\u00edcico temprano. 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relacionados&#8230;<\/p>\n","protected":false},"author":1,"featured_media":9416,"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":[17],"tags":[],"class_list":["post-9254","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-fauna-del-ordovicio"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Aegirocassis | El caparaz\u00f3n dorsal en forma de gota<\/title>\n<meta name=\"description\" content=\"Se han llegado a realizar reconstrucciones del Aegirocassis usando como referencia a otros radiodontos relacionados.\" \/>\n<meta name=\"robots\" content=\"noindex, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta 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