{"id":9068,"date":"2025-11-24T12:50:42","date_gmt":"2025-11-24T11:50:42","guid":{"rendered":"https:\/\/clientes.munecarusa.com\/mp\/?p=9068"},"modified":"2026-02-18T11:59:13","modified_gmt":"2026-02-18T10:59:13","slug":"myllokunmingia","status":"publish","type":"post","link":"https:\/\/clientes.munecarusa.com\/mp\/myllokunmingia\/","title":{"rendered":"Myllokunmingia"},"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>Shu, Zhang &#038; Han, 1999<\/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=\"Myllokunmingia\" width=\"30\" height=\"50\" \/><\/h2>\n<p>Myllokunmingia es un cordado del C\u00e1mbrico Inferior cuya importancia dentro de la historia de la vida es extraordinaria, porque se considera uno de los primeros representantes conocidos del linaje que acabar\u00eda dando lugar a todos los vertebrados modernos, incluidos peces, anfibios, reptiles, aves y mam\u00edferos. Aunque su clasificaci\u00f3n exacta sigue siendo objeto de debate, muchos paleont\u00f3logos lo consideran un vertebrado primitivo o, al menos, un cordado muy cercano al origen de los vertebrados.[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=\u00bb2_3,1_3&#8243; _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=\u00bb2_3&#8243; _builder_version=\u00bb4.27.2&#8243; _module_preset=\u00bbdefault\u00bb animation_style=\u00bbzoom\u00bb global_colors_info=\u00bb{}\u00bb][et_pb_image src=\u00bbhttps:\/\/clientes.munecarusa.com\/mp\/wp-content\/uploads\/2025\/11\/Myllokunmingia.webp\u00bb alt=\u00bbMyllokunmingia\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=\u00bb4.27.4&#8243; _module_preset=\u00bbdefault\u00bb custom_margin=\u00bb25px||||false|false\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=\u00bb4.27.4&#8243; _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; 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 text_font_size_last_edited=\u00bboff|phone\u00bb text_line_height_last_edited=\u00bboff|desktop\u00bb header_2_font_size_last_edited=\u00bboff|phone\u00bb header_3_font_size_tablet=\u00bb25px\u00bb header_3_font_size_phone=\u00bb15px\u00bb header_3_font_size_last_edited=\u00bbon|phone\u00bb header_4_font_size_last_edited=\u00bboff|phone\u00bb global_colors_info=\u00bb{}\u00bb header_4_text_color__hover_enabled=\u00bboff|hover\u00bb]<\/p>\n<h3>FAUNA DEL C\u00c1MBRICO<\/h3>\n<p>[\/et_pb_text][\/et_pb_column][et_pb_column type=\u00bb1_3&#8243; _builder_version=\u00bb4.27.2&#8243; _module_preset=\u00bbdefault\u00bb animation_style=\u00bbslide\u00bb animation_direction=\u00bbright\u00bb sticky_limit_top=\u00bbrow\u00bb sticky_limit_bottom=\u00bbrow\u00bb global_colors_info=\u00bb{}\u00bb][et_pb_accordion db_closeable=\u00bbon\u00bb db_initial_state=\u00bball_closed\u00bb open_toggle_text_color=\u00bb#FFFFFF\u00bb open_toggle_background_color=\u00bb#660000&#8243; closed_toggle_text_color=\u00bb#FFFFFF\u00bb closed_toggle_background_color=\u00bb#ff6600&#8243; toggle_icon=\u00bb&#x50;||divi||400&#8243; icon_color=\u00bb#FFFFFF\u00bb use_icon_font_size=\u00bbon\u00bb icon_font_size=\u00bb25px\u00bb _builder_version=\u00bb4.27.5&#8243; _module_preset=\u00bbdefault\u00bb toggle_text_color=\u00bb#FFFFFF\u00bb toggle_font=\u00bb|700|||||||\u00bb toggle_font_size=\u00bb22px\u00bb toggle_letter_spacing=\u00bb1px\u00bb body_font=\u00bb|600|||||||\u00bb body_text_color=\u00bb#FFFFFF\u00bb background_enable_color=\u00bboff\u00bb custom_margin=\u00bb25px||||false|false\u00bb custom_margin_tablet=\u00bb0px||||false|false\u00bb custom_margin_phone=\u00bb0px||||false|false\u00bb custom_margin_last_edited=\u00bbon|tablet\u00bb hover_enabled=\u00bb0&#8243; toggle_font_size_tablet=\u00bb19px\u00bb toggle_font_size_phone=\u00bb16px\u00bb toggle_font_size_last_edited=\u00bbon|phone\u00bb body_font_size_tablet=\u00bb16px\u00bb body_font_size_phone=\u00bb14px\u00bb body_font_size_last_edited=\u00bbon|phone\u00bb global_colors_info=\u00bb{}\u00bb theme_builder_area=\u00bbpost_content\u00bb sticky_enabled=\u00bb0&#8243;][et_pb_accordion_item title=\u00bbEra Geol\u00f3gica\u00bb open=\u00bbon\u00bb _builder_version=\u00bb4.27.4&#8243; _module_preset=\u00bbdefault\u00bb global_colors_info=\u00bb{}\u00bb theme_builder_area=\u00bbpost_content\u00bb]Era: Paleozoica<br \/>\nPeriodo: C\u00e1mbrico[\/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;]Shu, Zhang &#038; Han, 1999[\/et_pb_accordion_item][et_pb_accordion_item title=\u00bbOrigen\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 disabled_on=\u00bboff|off|off\u00bb _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;]Myllokunmingia es un cordado del C\u00e1mbrico Inferior cuya importancia dentro de la historia de la vida es extraordinaria, porque se considera uno de los primeros representantes conocidos del linaje que acabar\u00eda dando lugar a todos los vertebrados modernos, incluidos peces, anfibios, reptiles, aves y mam\u00edferos. Aunque su clasificaci\u00f3n exacta sigue siendo objeto de debate, muchos paleont\u00f3logos lo consideran un vertebrado primitivo o, al menos, un cordado muy cercano al origen de los vertebrados. Su antig\u00fcedad, estimada en unos 530 millones de a\u00f1os, lo sit\u00faa en un momento crucial de la evoluci\u00f3n animal, cuando los primeros organismos complejos estaban diversific\u00e1ndose r\u00e1pidamente durante la explosi\u00f3n c\u00e1mbrica. Los restos f\u00f3siles de Myllokunmingia fueron hallados en los Esquistos de Maotianshan, cerca de Haikou, en la regi\u00f3n de Kunming, provincia de Yunnan, en China, un yacimiento excepcionalmente rico que ha proporcionado algunos de los f\u00f3siles m\u00e1s importantes para comprender el origen de los animales con simetr\u00eda bilateral y estructuras internas complejas.<\/p>\n<p>El f\u00f3sil de Myllokunmingia muestra un organismo peque\u00f1o, de apenas 28 mil\u00edmetros de longitud y unos 6 mil\u00edmetros de altura, lo que lo convierte en un animal diminuto pero crucial para entender la evoluci\u00f3n de los vertebrados. Su cuerpo alargado y blando recuerda superficialmente a los mixinos actuales, animales que tambi\u00e9n carecen de mand\u00edbulas y poseen esqueletos cartilaginosos. Esta semejanza ha llevado a algunos investigadores a proponer que Myllokunmingia podr\u00eda representar un estadio temprano en la evoluci\u00f3n de los agnatos, los vertebrados sin mand\u00edbulas. Tanto su cr\u00e1neo como sus estructuras esquel\u00e9ticas eran cartilaginosas, lo que significa que no presentaban mineralizaci\u00f3n, un proceso conocido como biomineralizaci\u00f3n que aparece m\u00e1s tarde en la evoluci\u00f3n de los vertebrados. La ausencia de elementos \u00f3seos mineralizados es coherente con su antig\u00fcedad y con la idea de que los primeros vertebrados ten\u00edan esqueletos completamente cartilaginosos, similares a los de las lampreas y mixinos modernos.<\/p>\n<p>Una de las caracter\u00edsticas m\u00e1s importantes de Myllokunmingia es la diferenciaci\u00f3n clara entre la cabeza y el tronco, algo fundamental en la evoluci\u00f3n de los vertebrados. La cabeza presenta entre cinco y seis branquias, lo que indica la presencia de un sistema respiratorio segmentado y organizado, similar al de los vertebrados primitivos. Estas branquias sugieren que Myllokunmingia ya pose\u00eda una faringe perforada, una estructura clave en los cordados que permite la filtraci\u00f3n de agua y el intercambio gaseoso. La presencia de branquias tambi\u00e9n implica que este animal viv\u00eda en un entorno acu\u00e1tico donde la respiraci\u00f3n a trav\u00e9s de estructuras internas era ventajosa, probablemente en aguas relativamente tranquilas y ricas en nutrientes.<\/p>\n<p>El tronco de Myllokunmingia muestra unos 25 segmentos en forma de \u201cV\u201d orientados hacia atr\u00e1s, lo que indica la presencia de musculatura segmentada, una caracter\u00edstica esencial de los cordados. Estos segmentos musculares, conocidos como miotomos, permit\u00edan al animal moverse mediante ondulaciones laterales, un tipo de locomoci\u00f3n eficiente para organismos peque\u00f1os y alargados que nadan cerca del fondo marino o entre part\u00edculas en suspensi\u00f3n. La presencia de miotomos bien definidos es una de las pruebas m\u00e1s s\u00f3lidas de que Myllokunmingia pertenece al linaje de los cordados, ya que esta organizaci\u00f3n muscular es una caracter\u00edstica distintiva del grupo.<\/p>\n<p>Adem\u00e1s, Myllokunmingia pose\u00eda una cuerda dorsal, una estructura flexible que recorr\u00eda el cuerpo y que serv\u00eda como soporte interno. La cuerda dorsal es una de las caracter\u00edsticas definitorias de los cordados y representa el precursor evolutivo de la columna vertebral. En los vertebrados modernos, la cuerda dorsal es reemplazada durante el desarrollo por las v\u00e9rtebras, pero en los cordados primitivos como Myllokunmingia, la cuerda dorsal era la principal estructura de soporte. La presencia de esta cuerda dorsal, junto con la musculatura segmentada y las branquias, refuerza la idea de que este animal se encuentra muy cerca del origen de los vertebrados.<\/p>\n<p>El f\u00f3sil tambi\u00e9n muestra indicios de una faringe y un tubo digestivo que probablemente se extend\u00eda hasta la punta de la cola, lo que sugiere un sistema digestivo relativamente simple pero funcional. La boca no ha podido identificarse con claridad, lo que podr\u00eda deberse a la mala preservaci\u00f3n de las partes blandas o a que la boca era una estructura peque\u00f1a y poco diferenciada. Tambi\u00e9n es posible que Myllokunmingia tuviera una cavidad peric\u00e1rdica, lo que implicar\u00eda la presencia de un coraz\u00f3n primitivo o una estructura similar encargada de bombear fluidos a trav\u00e9s del cuerpo. La existencia de una cavidad peric\u00e1rdica ser\u00eda un indicio adicional de su afinidad con los vertebrados, ya que los sistemas circulatorios cerrados aparecen muy temprano en la evoluci\u00f3n del grupo.<\/p>\n<p>Un detalle interesante es que solo se ha encontrado un esp\u00e9cimen con la cola preservada, y esta se hallaba enterrada en el sedimento. Esto sugiere que la preservaci\u00f3n de Myllokunmingia es extremadamente delicada y que muchas partes del cuerpo, especialmente las m\u00e1s finas o blandas, se perdieron durante el proceso de fosilizaci\u00f3n. La rareza de f\u00f3siles completos hace que cada nuevo hallazgo sea crucial para reconstruir su anatom\u00eda y su posici\u00f3n evolutiva.<\/p>\n<p>En los mismos esquistos donde se encontr\u00f3 Myllokunmingia tambi\u00e9n se hall\u00f3 Haikouichthys, otra criatura similar que comparte muchas caracter\u00edsticas con los primeros cordados. La presencia de ambos organismos en el mismo yacimiento sugiere que los mares del C\u00e1mbrico Inferior eran un entorno donde los primeros cordados estaban diversific\u00e1ndose y experimentando con nuevas formas corporales y estrategias de vida. Adem\u00e1s, en estos esquistos tambi\u00e9n se han encontrado posibles hemicordados, uno de los grupos m\u00e1s primitivos dentro de los deuter\u00f3stomos, lo que refuerza la idea de que esta regi\u00f3n fue un punto clave en la evoluci\u00f3n temprana de los animales complejos.<\/p>\n<p>Myllokunmingia, con su combinaci\u00f3n de rasgos primitivos y caracter\u00edsticas que anticipan a los vertebrados, representa un eslab\u00f3n fundamental en la historia evolutiva. Su descubrimiento ha permitido a los cient\u00edficos comprender mejor c\u00f3mo surgieron las estructuras b\u00e1sicas que caracterizan a los vertebrados modernos, desde la musculatura segmentada hasta la cuerda dorsal y las branquias. 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