{"id":9299,"date":"2025-11-26T13:36:29","date_gmt":"2025-11-26T12:36:29","guid":{"rendered":"https:\/\/clientes.munecarusa.com\/mp\/?p=9299"},"modified":"2026-02-18T14:36:16","modified_gmt":"2026-02-18T13:36:16","slug":"pentecopterus","status":"publish","type":"post","link":"https:\/\/clientes.munecarusa.com\/mp\/pentecopterus\/","title":{"rendered":"Pentecopterus"},"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; 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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 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=\"Pentecopterus\" width=\"30\" height=\"50\" \/><\/h2>\n<p>Pentecopterus es un g\u00e9nero de euript\u00e9ridos, un grupo extinto de artr\u00f3podos acu\u00e1ticos que domin\u00f3 los ecosistemas marinos del Paleozoico. Pentecopterus est\u00e1 registrado en rocas del Darriwiliense, en el Ordov\u00edcico Medio, hace aproximadamente 467,3 millones de a\u00f1os, lo que convierte a Pentecopterus en el euript\u00e9rido m\u00e1s antiguo conocido. Su antig\u00fcedad supera en casi nueve millones de a\u00f1os a otros euript\u00e9ridos ordov\u00edcicos como Brachypterus, lo que sit\u00faa a Pentecopterus en una posici\u00f3n clave para comprender el origen y la evoluci\u00f3n temprana de estos \u201cescorpiones marinos\u201d. El nombre Pentecopterus deriva del pentecontero, un buque de guerra de la antigua Grecia, y del sufijo -pterus, \u201cala\u201d, usado frecuentemente en otros g\u00e9neros de euript\u00e9ridos. El nombre espec\u00edfico decorahensis hace referencia a Decorah, Iowa, donde se descubrieron los f\u00f3siles de Pentecopterus.[\/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\/Pentecopterus.webp\u00bb alt=\u00bbPentecopterus\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 ORDOV\u00cdCICO<\/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; 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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;]Lamsdell, 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;]Grecia[\/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;]Megalograptidae[\/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; 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 theme_builder_area=\u00bbpost_content\u00bb sticky_enabled=\u00bb0&#8243;][et_pb_counter percent=\u00bb31&#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 sticky_enabled=\u00bb0&#8243;]Pentecopterus pertenece a la familia Megalograptidae, un grupo de euript\u00e9ridos que se distingue por poseer dos o m\u00e1s pares de espinas por pod\u00f3mero en el ap\u00e9ndice prosomal IV, una reducci\u00f3n notable de la mayor\u00eda de las espinas y exoesqueletos grandes ornamentados con escamas ovadas o triangulares. Pentecopterus alcanzaba una longitud estimada de 1,7 metros, lo que lo convierte en uno de los euript\u00e9ridos m\u00e1s grandes jam\u00e1s descubiertos. Aunque Pentecopterus era enorme, a\u00fan era superado por gigantes posteriores como Jaekelopterus rhenaniae, el mayor artr\u00f3podo conocido, que alcanzaba los 2,5 metros. Aun as\u00ed, dentro de Megalograptidae, Pentecopterus es el g\u00e9nero de mayor tama\u00f1o, superando claramente a otros miembros de la familia.<\/p>\n<p>Pentecopterus ha sido objeto de recreaciones cient\u00edficas y divulgativas. Para el programa \u201cLa Extra\u00f1a Verdad\u201d de National Geographic se cre\u00f3 una r\u00e9plica de Pentecopterus, con la colaboraci\u00f3n del paleont\u00f3logo James Lamsdell, uno de los autores que describi\u00f3 el g\u00e9nero. Lamsdell proporcion\u00f3 informaci\u00f3n detallada e ilustraciones que permitieron reconstruir con precisi\u00f3n la anatom\u00eda de Pentecopterus. Una vez terminada, la r\u00e9plica fue trasladada al lugar del impacto donde se hallaron los f\u00f3siles originales, reforzando la conexi\u00f3n entre la investigaci\u00f3n cient\u00edfica y la divulgaci\u00f3n p\u00fablica.<\/p>\n<p>Los espec\u00edmenes de Pentecopterus muestran que este euript\u00e9rido pod\u00eda alcanzar longitudes de hasta 1,7 metros, aunque la mayor\u00eda de los individuos med\u00edan entre 75 y 100 cent\u00edmetros. Algunos tergitos fragmentarios de Megalograptus shideleri hab\u00edan sido interpretados como evidencia de un tama\u00f1o de dos metros, pero estudios posteriores demostraron que en realidad correspond\u00edan a un animal de apenas 56 cent\u00edmetros. Esto confirma que Pentecopterus era, con diferencia, el mayor megalogr\u00e1ptido conocido.<\/p>\n<p>La abundancia de f\u00f3siles fragmentarios de Pentecopterus, incluyendo juveniles y restos de mudas (exuvias), ha permitido reconstruir casi por completo su morfolog\u00eda externa. Pentecopterus se diagnostica como un megalogr\u00e1ptido que conserva un solo par de espinas en el tercer pod\u00f3mero del tercer ap\u00e9ndice prosomal, un ap\u00e9ndice corto en forma de V con un margen distal serrado, placas ventrales prosomales que se ensanchan hacia adelante, un pretelson sin expansi\u00f3n posterolateral y un telson con forma de xifo, ornamentado lateralmente con escamas. La placa ventral prosomal de Pentecopterus es del tipo Erieopterus, es decir, una \u00fanica placa que cubre la porci\u00f3n anterior y lateral del caparaz\u00f3n ventral, a la cual se articulan los ap\u00e9ndices mediante un tegumento ventral blando. El caparaz\u00f3n de Pentecopterus ten\u00eda un contorno cuadrado con una forma trapezoidal alargada, lo que le daba un aspecto robusto y distintivo.<\/p>\n<p>Los f\u00f3siles de Pentecopterus proceden principalmente de la Winneshiek Shale en Decorah, Iowa. La mayor\u00eda fueron recuperados en 2010 de la secci\u00f3n superior de cuatro metros del yacimiento, aunque tambi\u00e9n se recogieron bloques erosionados durante inundaciones, probablemente procedentes de los dos o tres metros superiores. En total se han encontrado m\u00e1s de 5000 f\u00f3siles en el yacimiento, de los cuales alrededor del 6,6 % pertenecen a euript\u00e9ridos. Entre ellos se encuentra el holotipo de Pentecopterus, SUI 139941, compuesto por una placa ventral prosomal y pod\u00f3meros proximales del ap\u00e9ndice prosomal II, adem\u00e1s de numerosos paratipos y material adicional, todos ellos conservados en el Repositorio de Paleontolog\u00eda de la Universidad de Iowa.<\/p>\n<p>Pentecopterus fue descrito formalmente en 2015 por James C. Lamsdell, Derek E. G. Briggs, Huaibao P. Liu, Brian J. Witzke y Robert M. McKay. La especie tipo es Pentecopterus decorahensis. Pentecopterus es el \u00fanico euript\u00e9rido descubierto en Iowa, aparte de Mycterops whitei, cuya asignaci\u00f3n al g\u00e9nero Mycterops es dudosa. El nombre Pentecopterus, inspirado en un antiguo barco de guerra griego, refleja tanto la forma hidrodin\u00e1mica del animal como su papel como depredador primitivo en los mares ordov\u00edcicos.<\/p>\n<p>Pentecopterus se clasifica dentro de la familia Megalograptidae, en la superfamilia monot\u00edpica Megalograptoidea. Pentecopterus comparte con otros megalogr\u00e1ptidos caracter\u00edsticas como la armadura orientada aleatoriamente en los pod\u00f3meros hinchados del ap\u00e9ndice IV y la gnatobase estrecha con m\u00faltiples filas de dientes peque\u00f1os en la coxa del ap\u00e9ndice V. Tambi\u00e9n comparte con Megalograptus las filas de escamas agrandadas que recorren el centro de los tergitos opistos\u00f3micos, aunque en Pentecopterus estas escamas no se sit\u00faan sobre crestas pronunciadas. Pentecopterus se distingue de otros megalogr\u00e1ptidos por poseer un solo par de espinas en el tercer pod\u00f3mero del ap\u00e9ndice III, una \u00fanica espina terminal en cada ap\u00e9ndice prosomal y la ausencia de ornamentaci\u00f3n cuticular densa.<\/p>\n<p>Pentecopterus carece de las l\u00e1minas cercales presentes en Megalograptus, estructuras que probablemente funcionaban como timones biol\u00f3gicos, similares al telson de los pterig\u00f3tidos. Esta ausencia sugiere que Pentecopterus era menos eficiente nadando que Megalograptus. Adem\u00e1s, Pentecopterus presenta caracter\u00edsticas \u00fanicas entre los euript\u00e9ridos, como la forma particular de su caparaz\u00f3n y la morfolog\u00eda inusual del sexto pod\u00f3mero del ap\u00e9ndice VI. 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