{"id":10802,"date":"2021-10-07T20:45:42","date_gmt":"2021-10-07T23:45:42","guid":{"rendered":"https:\/\/biologo.com.br\/bio\/?p=10802"},"modified":"2025-07-27T13:55:33","modified_gmt":"2025-07-27T16:55:33","slug":"a-origem-amazonica-dos-gambas","status":"publish","type":"post","link":"https:\/\/biologo.com.br\/bio\/a-origem-amazonica-dos-gambas\/","title":{"rendered":"A origem amaz\u00f4nica dos gamb\u00e1s"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\"><span style=\"font-size: 14pt; color: #000000;\"><span style=\"color: #3366ff;\"><strong>A origem amaz\u00f4nica: <\/strong><span style=\"color: #000000;\">estudo prop\u00f5e que gamb\u00e1s surgiram na Amaz\u00f4nia h\u00e1 cerca de 40 milh\u00f5es de anos.<\/span><\/span><\/span><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span style=\"font-family: 'courier new', courier, monospace; font-size: 24pt; color: #000000;\"><strong>A origem amaz\u00f4nica dos gamb\u00e1s<\/strong><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><span style=\"font-size: 8pt; color: #000000;\">7\/10\/2021 ::&nbsp; Por Eduardo Geraque\/Revista Pesquisa Fapesp<\/span><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><span style=\"color: #000000;\"><span style=\"font-family: georgia, palatino, serif; font-size: 24pt;\"><strong>A <\/strong><\/span>tese de que a regi\u00e3o amaz\u00f4nica, atualmente rica em biodiversidade, tamb\u00e9m serviu, no passado remoto, como geradora de v\u00e1rias formas de vida para outras \u00e1reas geogr\u00e1ficas ganhou mais um cap\u00edtulo. <\/span><\/p>\n\n\n\n<figure class=\"wp-block-image alignright\"><a href=\"https:\/\/biologo.com.br\/bio\/o-gamba-polinizador\/\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"167\" data-attachment-id=\"6658\" data-permalink=\"https:\/\/biologo.com.br\/bio\/o-gamba-polinizador\/o-gamba-polinizador\/\" data-orig-file=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2020\/03\/O-gamba-polinizador.jpg?fit=631%2C351&amp;ssl=1\" data-orig-size=\"631,351\" data-comments-opened=\"0\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"O-gamba-polinizador\" data-image-description=\"&lt;p&gt;Didelphis aurita no Rio de Janeiro, RJ, Brasil&lt;\/p&gt;\n\" data-image-caption=\"&lt;p&gt;Didelphis aurita. by \tChristian Roger Dockhorn&lt;\/p&gt;\n\" data-large-file=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2020\/03\/O-gamba-polinizador.jpg?fit=631%2C351&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2020\/03\/O-gamba-polinizador.jpg?resize=300%2C167&#038;ssl=1\" alt=\"O gamb\u00e1 polinizador - Didelphis aurita\" class=\"wp-image-6658\" srcset=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2020\/03\/O-gamba-polinizador.jpg?resize=300%2C167&amp;ssl=1 300w, https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2020\/03\/O-gamba-polinizador.jpg?w=631&amp;ssl=1 631w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><figcaption class=\"wp-element-caption\"><span style=\"font-size: 10pt;\"><a href=\"https:\/\/biologo.com.br\/bio\/o-gamba-polinizador\/\">O gamb\u00e1 polinizador<\/a> &#8211; <em>Didelphis aurita<\/em><\/span><\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><span style=\"color: #000000;\">A partir da an\u00e1lise de f\u00f3sseis e da distribui\u00e7\u00e3o geogr\u00e1fica ao longo do tempo geol\u00f3gico de esp\u00e9cies vivas e extintas da fam\u00edlia dos didelf\u00eddeos, popularmente conhecidos como gamb\u00e1s, a bi\u00f3loga Mariela Castro, da Universidade Federal de Catal\u00e3o (UFCAT), de Goi\u00e1s, e colaboradores apresentaram ind\u00edcios de que esse grupo de marsupiais teria surgido na Amaz\u00f4nia h\u00e1 aproximadamente 40 milh\u00f5es de anos.<\/span><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><span style=\"font-size: 14pt; color: #0000ff;\"><a style=\"color: #0000ff;\" href=\"https:\/\/biologo.com.br\/bio\/indri-um-lemure-de-respeito\/\">Indri, um l\u00eamure de respeito<\/a><\/span><\/li>\n\n\n\n<li><span style=\"font-size: 14pt; color: #0000ff;\"><a style=\"color: #0000ff;\" href=\"https:\/\/biologo.com.br\/bio\/uma-mentira-sobre-o-pica-pau\/\" target=\"_blank\" rel=\"noopener\">Uma mentira sobre o Pica-pau<\/a><\/span><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><span style=\"color: #000000;\">Segundo estudo publicado em junho no Journal of Mammalian Evolution, os gamb\u00e1s teriam se originado no norte da Am\u00e9rica do Sul, onde foram se diversificando durante tr\u00eas quartos de sua hist\u00f3ria evolutiva. Apenas mais tarde, conquistaram outras partes do continente, inclusive a Am\u00e9rica do Norte.<\/span><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><span style=\"color: #000000;\">Os gamb\u00e1s s\u00e3o o principal grupo de marsupiais, mam\u00edferos que costumam ter um envolt\u00f3rio em forma de bolsa para carregar filhotes, surgidos fora da Austr\u00e1lia e da Nova Zel\u00e2ndia. Com exce\u00e7\u00e3o de uma esp\u00e9cie encontrada na Am\u00e9rica do Norte, todas as demais formas de didelf\u00eddeos, que est\u00e3o classificadas em 18 g\u00eaneros e cerca de 130 esp\u00e9cies, est\u00e3o presentes hoje apenas na Am\u00e9rica do Sul e, em menor escala, na Am\u00e9rica Central. Cerca de 70% dos marsupiais s\u00e3o end\u00eamicos da Oceania, continente associado a esse tipo de mam\u00edfero, e o restante est\u00e1 nas Am\u00e9ricas.<\/span><\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span style=\"font-family: 'courier new', courier, monospace; font-size: 12pt; color: #000000;\"><strong>Marsupiais da floresta<\/strong><\/span><\/h3>\n\n\n\n<figure class=\"wp-block-image aligncenter\"><a href=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2021\/10\/A-origem-amazonica-dos-gambas.jpg?ssl=1\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"631\" height=\"351\" data-attachment-id=\"10805\" data-permalink=\"https:\/\/biologo.com.br\/bio\/a-origem-amazonica-dos-gambas\/a-origem-amazonica-dos-gambas-2\/\" data-orig-file=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2021\/10\/A-origem-amazonica-dos-gambas.jpg?fit=631%2C351&amp;ssl=1\" data-orig-size=\"631,351\" data-comments-opened=\"0\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"A-origem-amaz\u00f4nica-dos-gamb\u00e1s\" data-image-description=\"&lt;p&gt;A origem amaz\u00f4nica dos gamb\u00e1s. Fam\u00edlia de Gamb\u00e1s-de-orelha-branca (Didelphis albiventris)&lt;\/p&gt;\n\" data-image-caption=\"&lt;p&gt;Fam\u00edlia de Gamb\u00e1s-de-orelha-branca (Didelphis albiventris)&lt;\/p&gt;\n\" data-large-file=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2021\/10\/A-origem-amazonica-dos-gambas.jpg?fit=631%2C351&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2021\/10\/A-origem-amazonica-dos-gambas.jpg?resize=631%2C351&#038;ssl=1\" alt=\"A origem amaz\u00f4nica dos gamb\u00e1s\" class=\"wp-image-10805\" srcset=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2021\/10\/A-origem-amazonica-dos-gambas.jpg?w=631&amp;ssl=1 631w, https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2021\/10\/A-origem-amazonica-dos-gambas.jpg?resize=300%2C167&amp;ssl=1 300w\" sizes=\"auto, (max-width: 631px) 100vw, 631px\" \/><\/a><figcaption class=\"wp-element-caption\"><span style=\"color: #000000;\"><span style=\"font-size: 10pt;\">Fam\u00edlia de Gamb\u00e1s-de-orelha-branca (<em>Didelphis albiventris<\/em>).<\/span> <span style=\"font-size: 8pt;\">Alexandre Toda Faitarone\u2009\/\u2009Wikimedia Commons<\/span><\/span><\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><span style=\"color: #000000;\">Os gamb\u00e1s derivariam de formas hoje extintas de mam\u00edferos que existiam nas Am\u00e9ricas cerca de 70 milh\u00f5es de anos atr\u00e1s. Esses antecessores dos primeiros gamb\u00e1s desapareceram da Am\u00e9rica do Norte, mas se preservaram na Am\u00e9rica do Sul. \u201cA evolu\u00e7\u00e3o do grupo dos didelf\u00eddeos permaneceu restrita exclusivamente \u00e0 regi\u00e3o amaz\u00f4nica por quase 30 milh\u00f5es de anos\u201d, afirma Castro. \u201cNesse per\u00edodo, a floresta tropical \u00famida j\u00e1 estava presente.\u201d<\/span><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><span style=\"color: #000000;\"> No modelo apresentado no artigo cient\u00edfico, 36 dos 43 eventos evolutivos que culminaram no surgimento das atuais subfam\u00edlias e tribos de gamb\u00e1s ocorreram na Amaz\u00f4nia h\u00e1 mais de 10 milh\u00f5es de anos. N\u00e3o que o per\u00edodo mais recente, entre 10 milh\u00f5es e 2,7 milh\u00f5es de anos atr\u00e1s, n\u00e3o tenha sido igualmente importante para os gamb\u00e1s. Na verdade, a diversifica\u00e7\u00e3o do grupo, de acordo com o trabalho do grupo brasileiro, deu-se em paralelo \u00e0s modifica\u00e7\u00f5es geol\u00f3gicas e clim\u00e1ticas que tamb\u00e9m ocorreram na Am\u00e9rica do Sul.<\/span><\/p>\n\n\n\n<figure class=\"wp-block-image alignright is-resized\"><a href=\"https:\/\/biologo.com.br\/bio\/proteger-a-floresta-salva-vidas\/\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"167\" data-attachment-id=\"10100\" data-permalink=\"https:\/\/biologo.com.br\/bio\/proteger-a-floresta-salva-vidas\/proteger-a-floresta-salva-vidas\/\" data-orig-file=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2021\/07\/Proteger-a-floresta-salva-vidas.jpg?fit=631%2C351&amp;ssl=1\" data-orig-size=\"631,351\" data-comments-opened=\"0\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"Proteger-a-floresta-salva-vidas\" data-image-description=\"&lt;p&gt;Proteger a floresta salva vidas. O Dia de Prote\u00e7\u00e3o \u00e0s Florestas, comemorado em 17 de julho, nos provoca \u00e0 reflex\u00e3o e nem tanto \u00e0 celebra\u00e7\u00e3o. A superf\u00edcie emersa do nosso planeta, o \u00fanico que temos para habitar, \u00e9 de aproximadamente 15 bilh\u00f5es de hectares, dos quais a metade (cerca de 7,5 bilh\u00f5es de hectares) j\u00e1 foi floresta, total que hoje est\u00e1 reduzido a cerca de 5,5 bilh\u00f5es de hectares.&lt;\/p&gt;\n\" data-image-caption=\"&lt;p&gt;Vista da Floresta Amaz\u00f4nica \/ Foto: Tamara Sar\u00e9\/Ag\u00eancia Par\u00e1&lt;\/p&gt;\n\" data-large-file=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2021\/07\/Proteger-a-floresta-salva-vidas.jpg?fit=631%2C351&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2021\/07\/Proteger-a-floresta-salva-vidas.jpg?resize=300%2C167&#038;ssl=1\" alt=\"Proteger a floresta salva vidas - A origem amaz\u00f4nica dos gamb\u00e1s\" class=\"wp-image-10100\" style=\"width:237px;height:auto\" srcset=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2021\/07\/Proteger-a-floresta-salva-vidas.jpg?resize=300%2C167&amp;ssl=1 300w, https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2021\/07\/Proteger-a-floresta-salva-vidas.jpg?w=631&amp;ssl=1 631w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><figcaption class=\"wp-element-caption\"><span style=\"font-size: 10pt; color: #000000;\">A origem amaz\u00f4nica dos gamb\u00e1s<\/span><\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><span style=\"color: #000000;\">A lista de eventos transformadores mais recentes no norte da Am\u00e9rica do Sul est\u00e1 longe de ser desprez\u00edvel. Enquanto os gamb\u00e1s ainda evolu\u00edam apenas dentro da Amaz\u00f4nia, j\u00e1 havia ocorrido as chamadas transgress\u00f5es marinhas (eleva\u00e7\u00f5es no n\u00edvel dos oceanos) na pr\u00f3pria regi\u00e3o e na bacia do Paran\u00e1. Outro evento geol\u00f3gico capital se daria logo depois. <\/span><span style=\"color: #000000;\">\u201cEntre aproximadamente 10 milh\u00f5es e 7 milh\u00f5es de anos atr\u00e1s, houve o aumento da eleva\u00e7\u00e3o da por\u00e7\u00e3o norte dos Andes e a pr\u00f3pria forma\u00e7\u00e3o do rio Amazonas como se conhece hoje\u201d, comenta Castro. <\/span><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><span style=\"color: #000000;\">Os registros paleoclim\u00e1ticos mostram que houve uma queda generalizada nas temperaturas m\u00e9dias globais e uma expans\u00e3o das \u00e1reas de savana mais ao sul, onde hoje ficam a Caatinga e o Cerrado, al\u00e9m das \u00e1reas secas entre o Paraguai e o norte da Argentina. Quase todos os g\u00eaneros atuais de gamb\u00e1s surgiram ap\u00f3s a ocorr\u00eancia dessas grandes transforma\u00e7\u00f5es.<\/span><\/p>\n\n\n\n<figure class=\"wp-block-image alignright wp-image-10806 size-full\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"111\" height=\"161\" data-attachment-id=\"10806\" data-permalink=\"https:\/\/biologo.com.br\/bio\/a-origem-amazonica-dos-gambas\/didelphis-albiventris\/\" data-orig-file=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2021\/10\/Didelphis-albiventris.jpg?fit=111%2C161&amp;ssl=1\" data-orig-size=\"111,161\" data-comments-opened=\"0\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"Didelphis-albiventris\" data-image-description=\"&lt;p&gt; O Gamb\u00e1-de-Orelha-Branca (Didelphis albiventris) \u00e9 um mam\u00edfero muito comum no nordeste do Brasil e em algumas outras regi\u00f5es do pa\u00eds. Didelphis albiventris&lt;\/p&gt;\n\" data-image-caption=\"&lt;p&gt;Magno Vianna&lt;\/p&gt;\n\" data-large-file=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2021\/10\/Didelphis-albiventris.jpg?fit=111%2C161&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2021\/10\/Didelphis-albiventris.jpg?resize=111%2C161&#038;ssl=1\" alt=\"Didelphis albiventris - gamb\u00e1 - A origem amaz\u00f4nica dos gamb\u00e1s\" class=\"wp-image-10806\"\/><figcaption class=\"wp-element-caption\"><span style=\"font-size: 8pt;\"><span style=\"color: #000000;\">\u00a9 <\/span>Magno Vianna<\/span><\/figcaption><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\"><span style=\"font-family: 'courier new', courier, monospace; font-size: 12pt;\"><strong><span style=\"color: #000000;\">&#8220;Os gamb\u00e1s conseguiram passar para a Am\u00e9rica do Norte\u201d.<\/span><\/strong><\/span><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\"><span style=\"color: #000000;\">O modelo proposto pelo estudo considera nove zonas biogeogr\u00e1ficas na Am\u00e9rica do Sul para testar a hip\u00f3tese de em quais delas os didelf\u00eddeos teriam se originado e por onde expandiram seus h\u00e1bitats. As \u00faltimas \u00e1reas conquistadas pelos gamb\u00e1s teriam sido os Pampas e a Am\u00e9rica do Norte. \u201cH\u00e1 3 milh\u00f5es de anos, em raz\u00e3o do soerguimento do istmo do Panam\u00e1, que conectou as tr\u00eas partes do continente, os gamb\u00e1s conseguiram passar para a Am\u00e9rica do Norte\u201d, comenta Castro. Essa chegada tardia a terras mais setentrionais provavelmente explica por que hoje existe apenas uma esp\u00e9cie desse grupo nos Estados Unidos e no Canad\u00e1, o gamb\u00e1-da-virg\u00ednia (<em>Didelphis virginiana<\/em>).&nbsp;<\/span><\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span style=\"font-family: 'courier new', courier, monospace; font-size: 12pt;\"><strong><span style=\"color: #000000;\">A Amaz\u00f4nia como local de origem dos gamb\u00e1s <\/span><\/strong><\/span><\/h3>\n\n\n\n<figure class=\"wp-block-image aligncenter\"><a href=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2021\/10\/gamba-da-virginia.jpg?ssl=1\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"631\" height=\"351\" data-attachment-id=\"10807\" data-permalink=\"https:\/\/biologo.com.br\/bio\/a-origem-amazonica-dos-gambas\/gamba-da-virginia\/\" data-orig-file=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2021\/10\/gamba-da-virginia.jpg?fit=631%2C351&amp;ssl=1\" data-orig-size=\"631,351\" data-comments-opened=\"0\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"gamb\u00e1-da-virg\u00ednia\" data-image-description=\"&lt;p&gt;Gamb\u00e1-da-virg\u00ednia, \u00fanica esp\u00e9cie que ocorre na Am\u00e9rica do Norte. Didelphis virginiana&lt;\/p&gt;\n\" data-image-caption=\"&lt;p&gt;Gamb\u00e1-da-virg\u00ednia (Didelphis virginiana), \u00fanica esp\u00e9cie que ocorre na Am\u00e9rica do Norte&lt;\/p&gt;\n\" data-large-file=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2021\/10\/gamba-da-virginia.jpg?fit=631%2C351&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2021\/10\/gamba-da-virginia.jpg?resize=631%2C351&#038;ssl=1\" alt=\"gamb\u00e1-da-virg\u00ednia - A origem amaz\u00f4nica dos gamb\u00e1s\" class=\"wp-image-10807\" srcset=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2021\/10\/gamba-da-virginia.jpg?w=631&amp;ssl=1 631w, https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2021\/10\/gamba-da-virginia.jpg?resize=300%2C167&amp;ssl=1 300w\" sizes=\"auto, (max-width: 631px) 100vw, 631px\" \/><\/a><figcaption class=\"wp-element-caption\"><span style=\"font-size: 10pt; color: #000000;\">Gamb\u00e1-da-virg\u00ednia (<em>Didelphis virginiana<\/em>), \u00fanica esp\u00e9cie que ocorre na Am\u00e9rica do Norte.<\/span><\/figcaption><\/figure>\n\n\n\n<h4 class=\"wp-block-heading has-medium-font-size\"><span style=\"color: #000000;\">Reconstru\u00e7\u00e3o biogeogr\u00e1fica da hist\u00f3ria evolutiva dos didelf\u00eddeos<\/span><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\"><span style=\"color: #000000;\">\u201cO artigo \u00e9 uma contribui\u00e7\u00e3o interessante\u201d, afirma a bi\u00f3loga Ana Paula Carmignotto, da Universidade Federal de S\u00e3o Carlos (UFSCar), que n\u00e3o fez parte do grupo que assina o estudo. Segundo ela, trabalhos anteriores sobre a reconstru\u00e7\u00e3o biogeogr\u00e1fica da hist\u00f3ria evolutiva dos didelf\u00eddeos apontavam como seu ber\u00e7o as florestas da Am\u00e9rica do Sul, mas sem discriminar exatamente em qual ou quais biomas sua g\u00eanese teria ocorrido. \u201cO ponto alto do trabalho, al\u00e9m da hist\u00f3ria evolutiva, \u00e9 a identifica\u00e7\u00e3o, pela primeira vez, da Amaz\u00f4nia como local de origem desse grupo\u201d, afirma Carmignotto.<\/span><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><span style=\"color: #000000;\">O trabalho que prop\u00f5e a Amaz\u00f4nia como local de origem dos gamb\u00e1s est\u00e1 longe de esgotar as ideias para novos estudos. Para quem trabalha com esse tema, um dos grandes desafios \u00e9 conseguir unir os resultados biogeogr\u00e1ficos aos registros paleontol\u00f3gicos. No&nbsp;<em>paper<\/em>&nbsp;publicado agora, os autores fizeram esse cruzamento. Na maioria dos casos, as informa\u00e7\u00f5es coincidiram, ou seja, as idades dos f\u00f3sseis se encaixaram nas idades apresentadas pela biogeografia. Mesmo assim, existem lacunas a serem preenchidas.<\/span><\/p>\n\n\n\n<figure class=\"wp-block-image alignleft\"><a href=\"https:\/\/biologo.com.br\/bio\/floresta-amazonica-e-mudancas-climaticas\/\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" data-attachment-id=\"6246\" data-permalink=\"https:\/\/biologo.com.br\/bio\/floresta-amazonica-e-mudancas-climaticas\/floresta-amazonica-e-mudanc\/\" data-orig-file=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2019\/08\/Floresta-amazonica-e-mudan%C3%A7.jpg?fit=631%2C351&amp;ssl=1\" data-orig-size=\"631,351\" data-comments-opened=\"0\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"Floresta-amazonica-e-mudancas-climaticas\" data-image-description=\"&lt;p&gt;Floresta amaz\u00f4nica e mudan\u00e7as clim\u00e1ticas. NASA.gov &lt;\/p&gt;\n\" data-image-caption=\"&lt;p&gt;Floresta amaz\u00f4nica e mudan\u00e7as clim\u00e1ticas. by NASA.gov &lt;\/p&gt;\n\" data-large-file=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2019\/08\/Floresta-amazonica-e-mudan%C3%A7.jpg?fit=631%2C351&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2019\/08\/Floresta-amazonica-e-mudan%C3%A7.jpg?resize=150%2C150&#038;ssl=1\" alt=\"Floresta amaz\u00f4nica e mudan\u00e7as clim\u00e1ticas\" class=\"wp-image-6246\" title=\"Floresta amaz\u00f4nica e mudan\u00e7as clim\u00e1ticas\" srcset=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2019\/08\/Floresta-amazonica-e-mudan%C3%A7.jpg?resize=150%2C150&amp;ssl=1 150w, https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2019\/08\/Floresta-amazonica-e-mudan%C3%A7.jpg?zoom=2&amp;resize=150%2C150&amp;ssl=1 300w, https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2019\/08\/Floresta-amazonica-e-mudan%C3%A7.jpg?zoom=3&amp;resize=150%2C150&amp;ssl=1 450w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><\/a><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><span style=\"color: #000000;\">H\u00e1 poucos f\u00f3sseis preservados de gamb\u00e1s no norte da Am\u00e9rica do Sul, limita\u00e7\u00e3o que dificulta ainda mais fazer a compara\u00e7\u00e3o dos dados paleontol\u00f3gicos com a hist\u00f3ria evolutiva impressa em partes do material gen\u00e9tico. \u201c\u00c9 dif\u00edcil ocorrer o processo de fossiliza\u00e7\u00e3o na Amaz\u00f4nia e na Mata Atl\u00e2ntica, que s\u00e3o ambientes muito \u00famidos\u201d, afirma a bi\u00f3loga da UFCAT. No caso dos gamb\u00e1s, existe uma dificuldade a mais. <\/span><span style=\"color: #000000;\">Os primeiros exemplares do grupo, muito provavelmente, n\u00e3o passavam dos 30 gramas.<\/span><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><span style=\"color: #000000;\"> Se preservado, seu registro f\u00f3ssil, de pequenas dimens\u00f5es, pode passar facilmente despercebido em uma coleta de campo. Para aumentar a chance de encontrar restos das primeiras linhagens de gamb\u00e1s, \u00e9 preciso mais investimento em trabalhos paleontol\u00f3gicos na regi\u00e3o norte da Am\u00e9rica do Sul \u2013 e de uma boa dose de sorte.<\/span><\/p>\n\n\n\n<h6 class=\"wp-block-heading\"><span style=\"font-size: 10pt; color: #000000; font-family: 'courier new', courier, monospace;\"><strong>Artigo cient\u00edfico:<\/strong><\/span><\/h6>\n\n\n\n<p class=\"wp-block-paragraph\"><span style=\"font-size: 8pt; color: #000000;\">CASTRO, M. C. <em>et al.<\/em>&nbsp;<em><a style=\"color: #000000;\" href=\"https:\/\/link.springer.com\/article\/10.1007\/s10914-021-09548-7\" target=\"_blank\" rel=\"noopener\">Amazonia as the origin and diversification area of didelphidae (Mammalia: Metatheria), and a review of the fossil record of the clade<\/a><\/em>.&nbsp;<strong>Journal of Mammalian Evolution<\/strong>. 23 jun. 2021.<\/span><\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><span style=\"font-size: 8pt;\"><span style=\"color: #000000;\"><span style=\"color: #333333;\">Fonte:<\/span> <a style=\"color: #000000;\" title=\"Marsupiais da floresta\" href=\"https:\/\/revistapesquisa.fapesp.br\/marsupiais-da-floresta\/\" target=\"_blank\" rel=\"noopener\">Marsupiais da floresta<\/a>\/<a style=\"color: #000000;\" href=\"https:\/\/revistapesquisa.fapesp.br\/\" target=\"_blank\" rel=\"noopener noreferrer\">Revista Pesquisa Fapesp<\/a> <\/span><a style=\"color: #999999;\" href=\"https:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/\" target=\"_blank\" rel=\"noopener noreferrer\">CC BY-ND 4.0<\/a><\/span><\/h4>\n","protected":false},"excerpt":{"rendered":"<p>A origem amaz\u00f4nica: estudo prop\u00f5e que gamb\u00e1s surgiram na Amaz\u00f4nia h\u00e1 cerca de 40 milh\u00f5es de anos. A origem amaz\u00f4nica<\/p>\n","protected":false},"author":1,"featured_media":10805,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"colormag_page_container_layout":"default_layout","colormag_page_sidebar_layout":"default_layout","_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"Estudo prop\u00f5e que gamb\u00e1s surgiram na Amaz\u00f4nia h\u00e1 cerca de 40 milh\u00f5es de anos.","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[121,25,9,27],"tags":[],"class_list":["post-10802","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-evolucao","category-mamiferos","category-mastozoologia","category-zoologia"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>A origem amaz\u00f4nica dos gamb\u00e1s - Marsupiais da floresta - Bi\u00f3logo<\/title>\n<meta name=\"description\" content=\"Estudo prop\u00f5e que gamb\u00e1s surgiram na Amaz\u00f4nia h\u00e1 cerca de 40 milh\u00f5es de anos. 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