{"id":9075,"date":"2025-11-24T13:02:12","date_gmt":"2025-11-24T12:02:12","guid":{"rendered":"https:\/\/clientes.munecarusa.com\/mp\/?p=9075"},"modified":"2026-02-18T12:03:23","modified_gmt":"2026-02-18T11:03:23","slug":"marrella","status":"publish","type":"post","link":"https:\/\/clientes.munecarusa.com\/mp\/marrella\/","title":{"rendered":"Marrella"},"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>Walcott, 1912<\/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=\"Marrella\" width=\"30\" height=\"50\" \/><\/h2>\n<p>Marrella es un g\u00e9nero extinto de artr\u00f3podo conocido exclusivamente a partir de los f\u00f3siles excepcionalmente bien preservados del esquisto de Burgess, un yacimiento del C\u00e1mbrico medio situado en la Columbia Brit\u00e1nica, Canad\u00e1, que ha proporcionado algunos de los organismos m\u00e1s sorprendentes y reveladores de toda la paleontolog\u00eda. La \u00fanica especie que contiene este g\u00e9nero es Marrella splendens, un organismo que, adem\u00e1s de ser uno de los m\u00e1s caracter\u00edsticos del yacimiento, es tambi\u00e9n el animal m\u00e1s com\u00fan encontrado en el esquisto de Burgess, lo que indica que debi\u00f3 de ser un componente abundante y posiblemente ecol\u00f3gicamente importante en los ecosistemas marinos de hace m\u00e1s de 505 millones de a\u00f1os. Su presencia masiva en estos dep\u00f3sitos sugiere que Marrella formaba parte de la fauna habitual del fondo marino, desempe\u00f1ando un papel relevante en la din\u00e1mica ecol\u00f3gica de su entorno.[\/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\/Marrella.webp\u00bb alt=\u00bbMarrella\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;]Walcott, 1912[\/et_pb_accordion_item][et_pb_accordion_item title=\u00bbOrigen\u00bb _builder_version=\u00bb4.27.4&#8243; _module_preset=\u00bbdefault\u00bb global_colors_info=\u00bb{}\u00bb theme_builder_area=\u00bbpost_content\u00bb open=\u00bboff\u00bb]Canad\u00e1[\/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; _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;]Marrellidae[\/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 hover_enabled=\u00bb0&#8243; 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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;]Marrella tiene tambi\u00e9n un valor hist\u00f3rico notable, ya que fue el primer f\u00f3sil recogido por Charles Doolittle Walcott en el esquisto de Burgess en 1909, un descubrimiento que marcar\u00eda el inicio de una de las investigaciones paleontol\u00f3gicas m\u00e1s influyentes del siglo XX. Walcott, al observar su delicada estructura, lo describi\u00f3 informalmente como un \u201ccangrejo de encaje\u201d, una expresi\u00f3n que refleja la complejidad y finura de sus ap\u00e9ndices y espinas. M\u00e1s tarde, en una descripci\u00f3n m\u00e1s formal, lo clasific\u00f3 como un trilobites extra\u00f1o, probablemente debido a su cuerpo segmentado y a su apariencia general, que recordaba superficialmente a los trilobites. Sin embargo, esta clasificaci\u00f3n result\u00f3 ser incorrecta. Con el tiempo, Marrella fue reasignado a la clase Trilobitoidea en el Tratado de Paleontolog\u00eda de Invertebrados, una categor\u00eda que hoy ya no se considera v\u00e1lida. Fue en 1971 cuando Harry Whittington, uno de los paleont\u00f3logos m\u00e1s influyentes en el estudio del esquisto de Burgess, llev\u00f3 a cabo una nueva descripci\u00f3n detallada del animal. Bas\u00e1ndose en el an\u00e1lisis minucioso de sus patas, sus branquias y los ap\u00e9ndices de la cabeza, Whittington concluy\u00f3 que Marrella no era ni un trilobites, ni un quelicerado, ni un crust\u00e1ceo, sino algo completamente distinto, un representante de un linaje de artr\u00f3podos muy primitivo y \u00fanico.<\/p>\n<p>Marrella forma parte de un conjunto de organismos extraordinarios y dif\u00edciles de clasificar encontrados en el esquisto de Burgess, criaturas que no encajan en los grupos modernos de artr\u00f3podos y que muestran combinaciones de rasgos anat\u00f3micos inesperados. Entre estos organismos se encuentran tambi\u00e9n Opabinia, con su trompa frontal y cinco ojos, y Yohoia, con sus ap\u00e9ndices prensiles. La diversidad morfol\u00f3gica de estas criaturas sorprendi\u00f3 profundamente a los cient\u00edficos en el momento de su descubrimiento, ya que revelaba que la fauna del C\u00e1mbrico medio era mucho m\u00e1s compleja, variada y experimental de lo que se hab\u00eda imaginado. Los f\u00f3siles de Burgess demostraron que los artr\u00f3podos tempranos exploraron una enorme variedad de planes corporales antes de que los linajes modernos se consolidaran, y Marrella es uno de los ejemplos m\u00e1s emblem\u00e1ticos de esta diversidad temprana.<\/p>\n<p>En cuanto a su anatom\u00eda, Marrella es un animal peque\u00f1o, que rara vez supera los 2 cent\u00edmetros de longitud. Su escudo cef\u00e1lico es una estructura distintiva, con dos pares de largas p\u00faas orientadas hacia atr\u00e1s, que probablemente cumpl\u00edan funciones defensivas o sensoriales, o incluso podr\u00edan haber ayudado a desviar sedimentos mientras el animal se desplazaba por el fondo marino. En la parte inferior de la cabeza se encuentran dos pares de antenas: un par largo y delgado, de funci\u00f3n probablemente sensorial, que habr\u00eda servido para explorar el entorno, detectar part\u00edculas y orientarse en el fondo marino; y un segundo par m\u00e1s corto y robusto, que podr\u00eda haber tenido funciones relacionadas con la manipulaci\u00f3n de alimento o la percepci\u00f3n t\u00e1ctil cercana.<\/p>\n<p>El cuerpo de Marrella est\u00e1 compuesto por entre 24 y 26 segmentos corporales, cada uno de los cuales lleva un par de ap\u00e9ndices birr\u00e1meos. La rama inferior de cada ap\u00e9ndice funciona como una pata locomotora, permitiendo al animal caminar o arrastrarse por el sustrato, mientras que la rama superior es una branquia larga y plumosa, especializada en el intercambio gaseoso. Esta combinaci\u00f3n de locomoci\u00f3n y respiraci\u00f3n en un mismo ap\u00e9ndice es caracter\u00edstica de muchos artr\u00f3podos primitivos y refleja un dise\u00f1o anat\u00f3mico eficiente para animales peque\u00f1os que viven en ambientes bent\u00f3nicos. En el extremo del t\u00f3rax, Marrella posee un peque\u00f1o telson en forma de bot\u00f3n, una estructura terminal que probablemente ayudaba a estabilizar el cuerpo o a dirigir el movimiento.<\/p>\n<p>Uno de los aspectos m\u00e1s intrigantes de Marrella es que no est\u00e1 claro c\u00f3mo se endurecieron la cabeza y las espinas, ya que no presentan mineralizaci\u00f3n. Esto sugiere que su exoesqueleto estaba compuesto de quitina u otro material org\u00e1nico flexible, lo que hace a\u00fan m\u00e1s sorprendente su preservaci\u00f3n en el esquisto de Burgess. La anatom\u00eda de Marrella presenta demasiadas antenas, muy pocas patas cef\u00e1licas y un n\u00famero insuficiente de segmentos por pata para ser considerado un trilobites. Adem\u00e1s, carece de los tres pares de patas detr\u00e1s de la boca que caracterizan a los crust\u00e1ceos modernos. Las patas de Marrella tambi\u00e9n difieren notablemente de las de los crust\u00e1ceos, ya que el primer par est\u00e1 modificado en un \u00fanico par de ple\u00f3podos con un abundante suministro de sangre, lo que sugiere una funci\u00f3n respiratoria o sensorial especializada.<\/p>\n<p>Un descubrimiento notable relacionado con Marrella es la identificaci\u00f3n de un patr\u00f3n de red de difracci\u00f3n en espec\u00edmenes excepcionalmente bien conservados. Este patr\u00f3n indica que el animal habr\u00eda tenido un brillo iridiscente en vida, lo que significa que su cuerpo habr\u00eda mostrado colores cambiantes y met\u00e1licos, similares a los de algunos insectos modernos como escarabajos o mariposas. Esta iridiscencia podr\u00eda haber tenido funciones relacionadas con la comunicaci\u00f3n, el camuflaje o simplemente ser un subproducto de la microestructura de su cut\u00edcula. Adem\u00e1s, muchas veces se observan manchas oscuras en las regiones posteriores de los f\u00f3siles, que probablemente representan materia de desecho extruida o restos de hemolinfa, lo que proporciona informaci\u00f3n adicional sobre su fisiolog\u00eda interna.<\/p>\n<p>En cuanto a su modo de vida, se cree que Marrella era un carro\u00f1ero bent\u00f3nico que viv\u00eda en el fondo marino y se alimentaba de material detrital y part\u00edculas org\u00e1nicas. Su combinaci\u00f3n de antenas sensoriales, patas locomotoras y branquias sugiere un animal activo que exploraba el sustrato en busca de alimento. Un ejemplar excepcional muestra a Marrella fosilizado en pleno proceso de muda, lo que proporciona una visi\u00f3n directa de su ciclo de vida y confirma que, como otros artr\u00f3podos, crec\u00eda mediante la muda peri\u00f3dica de su exoesqueleto.<\/p>\n<p>Actualmente, Marrella se considera un artr\u00f3podo troncal, es decir, un miembro de un linaje que desciende de un ancestro com\u00fan a \u00e9l y a la mayor\u00eda o a todos los grupos principales de artr\u00f3podos posteriores, pero que no pertenece a ninguno de los grupos modernos. Esto significa que Marrella representa una etapa temprana en la evoluci\u00f3n de los artr\u00f3podos, antes de que los linajes modernos como los quelicerados, los crust\u00e1ceos o los hex\u00e1podos se diversificaran plenamente. A pesar de su similitud superficial con los trilobites, no est\u00e1 m\u00e1s estrechamente relacionado con ellos que con cualquier otro grupo de artr\u00f3podos, lo que demuestra que la diversidad temprana de los artr\u00f3podos inclu\u00eda formas que no encajan en las categor\u00edas actuales.<\/p>\n<p>Marrella es tambi\u00e9n el g\u00e9nero m\u00e1s abundante del esquisto de Burgess. La mayor\u00eda de sus espec\u00edmenes provienen del llamado \u201clecho de Marrella\u201d, un horizonte delgado dentro del yacimiento, aunque tambi\u00e9n es com\u00fan en otros afloramientos del esquisto. Se han recogido m\u00e1s de 25.000 ejemplares, lo que proporciona una base excepcionalmente s\u00f3lida para estudiar su anatom\u00eda, variaci\u00f3n y ecolog\u00eda. En el Lecho de Fil\u00f3podos Mayor se conocen 5028 ejemplares de Marrella, donde constituyen el 9,56% de la comunidad, lo que indica que era uno de los organismos m\u00e1s representativos del ecosistema.<\/p>\n<p>Los marrellomorfos, organismos similares a Marrella, est\u00e1n bien distribuidos en otros dep\u00f3sitos del C\u00e1mbrico y se conocen incluso en sedimentos tan tard\u00edos como el Dev\u00f3nico, lo que sugiere que este linaje persisti\u00f3 durante decenas de millones de a\u00f1os y ocup\u00f3 una variedad de ambientes marinos. Su presencia en distintos yacimientos demuestra que los artr\u00f3podos tempranos experimentaron con una amplia gama de formas corporales antes de que los grupos modernos se establecieran definitivamente.[\/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||||false|false\u00bb custom_padding=\u00bb||||false|false\u00bb global_colors_info=\u00bb{}\u00bb][\/et_pb_divider][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=\u00bb1&#8243; custom_padding_last_edited=\u00bboff|desktop\u00bb admin_label=\u00bbApartados\u00bb _builder_version=\u00bb4.27.0&#8243; custom_margin=\u00bb||||false|false\u00bb custom_padding=\u00bb0px||0px||true|false\u00bb custom_padding_tablet=\u00bb||||false|false\u00bb custom_padding_phone=\u00bb||||false|false\u00bb collapsed=\u00bbon\u00bb global_colors_info=\u00bb{}\u00bb][et_pb_row column_structure=\u00bb1_2,1_2&#8243; 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global_colors_info=\u00bb{}\u00bb]Paleozoico o tambi\u00e9n era Primaria es una divisi\u00f3n de la escala temporal geol\u00f3gica de m\u00e1s de 290 millones de a\u00f1os de duraci\u00f3n, que se inici\u00f3 hace 542 millones de a\u00f1os. y acab\u00f3 hace unos 251 millones de a\u00f1os.[\/et_pb_blurb][et_pb_button button_url=\u00bbhttps:\/\/clientes.munecarusa.com\/mp\/era-paleozoica\/\u00bb button_text=\u00bbLeer M\u00e1s&#8230;\u00bb _builder_version=\u00bb4.27.2&#8243; _module_preset=\u00bbdefault\u00bb custom_button=\u00bbon\u00bb button_text_size=\u00bb18px\u00bb button_text_color=\u00bb#FFFFFF\u00bb button_bg_color=\u00bb#006633&#8243; button_letter_spacing=\u00bb1px\u00bb button_font=\u00bb|600|||||||\u00bb button_icon=\u00bb&#x24;||divi||400&#8243; button_icon_color=\u00bb#FFFFFF\u00bb custom_margin=\u00bb|||45px|false|false\u00bb button_text_size_tablet=\u00bb16px\u00bb button_text_size_phone=\u00bb14px\u00bb button_text_size_last_edited=\u00bbon|phone\u00bb box_shadow_style=\u00bbpreset3&#8243; 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header_font_size=\u00bb28px\u00bb body_text_align=\u00bbjustify\u00bb body_text_color=\u00bb#444444&#8243; custom_margin=\u00bb||10px||false|false\u00bb header_font_size_tablet=\u00bb22px\u00bb header_font_size_phone=\u00bb15px\u00bb header_font_size_last_edited=\u00bbon|desktop\u00bb header_line_height_tablet=\u00bb\u00bb header_line_height_phone=\u00bb1.2em\u00bb header_line_height_last_edited=\u00bbon|phone\u00bb body_font_size_tablet=\u00bb16px\u00bb body_font_size_phone=\u00bb14px\u00bb body_font_size_last_edited=\u00bbon|tablet\u00bb body_line_height_tablet=\u00bb1.7em\u00bb body_line_height_phone=\u00bb1.6em\u00bb body_line_height_last_edited=\u00bbon|tablet\u00bb header_text_shadow_style=\u00bbpreset1&#8243; global_colors_info=\u00bb{}\u00bb]Un gran s\u00faper continente Gondwana, se localiza al sur del planeta con tres \u00fanicos continentes, Siberia, B\u00e1ltica y Laurentia, se desplazan hacia el norte. 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