{"id":8083,"date":"2020-11-03T18:57:03","date_gmt":"2020-11-03T21:57:03","guid":{"rendered":"https:\/\/biologo.com.br\/bio\/?p=8083"},"modified":"2025-04-02T16:02:57","modified_gmt":"2025-04-02T19:02:57","slug":"evolucao-dos-cetaceos","status":"publish","type":"post","link":"https:\/\/biologo.com.br\/bio\/evolucao-dos-cetaceos\/","title":{"rendered":"Evolu\u00e7\u00e3o dos Cet\u00e1ceos"},"content":{"rendered":"<p><span style=\"font-size: 14pt; color: #000000;\"><span style=\"color: #3366ff;\"><strong>Evolu\u00e7\u00e3o dos Cet\u00e1ceos: <\/strong><span style=\"color: #000000;\">Acredita-se que a evolu\u00e7\u00e3o dos cet\u00e1ceos tenha come\u00e7ado no subcontinente indiano, a partir de ungulados com dedos pares h\u00e1 50 milh\u00f5es de anos. Confira curiosidades sobre a origem dos Cet\u00e1ceos<b>.<\/b><\/span><\/span><\/span><\/p>\n<h2><span style=\"font-family: 'courier new', courier, monospace; font-size: 24pt; color: #000000;\"><strong>Evolu\u00e7\u00e3o dos Cet\u00e1ceos<\/strong><\/span><\/h2>\n<div class=\"jetpack-video-wrapper\"><iframe loading=\"lazy\" title=\"Evolu\u00e7\u00e3o dos Cet\u00e1ceos - Document\u00e1rio PBS\" width=\"800\" height=\"450\" src=\"https:\/\/www.youtube.com\/embed\/clsGL_a38H4?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen><\/iframe><\/div>\n<p><span style=\"font-size: 8pt; color: #000000;\">03\/11\/2020 ::\u00a0 Por Josu\u00e9 Fontana<\/span><\/p>\n<p><span style=\"color: #000000;\"><span style=\"font-family: georgia, palatino, serif; font-size: 24pt;\"><strong>O<\/strong><\/span>s cet\u00e1ceos s\u00e3o mam\u00edferos marinhos totalmente aqu\u00e1ticos pertencentes \u00e0 ordem Artiodactyla que se originaram de outros artiod\u00e1ctilos por volta de 50 milh\u00f5es de anos atr\u00e1s. <\/span><\/p>\n<figure id=\"attachment_6143\" aria-describedby=\"caption-attachment-6143\" style=\"width: 300px\" class=\"wp-caption alignright\"><a href=\"https:\/\/biologo.com.br\/bio\/oceano-aberto\/\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"6143\" data-permalink=\"https:\/\/biologo.com.br\/bio\/oceano-aberto\/oceano-aberto\/\" data-orig-file=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2019\/07\/Oceano-Aberto.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=\"Oceano-Aberto\" data-image-description=\"&lt;p&gt;Oceano Aberto. Baleia, whale, corcunda&lt;\/p&gt;\n\" data-image-caption=\"&lt;p&gt;Oceano Aberto&lt;\/p&gt;\n\" data-large-file=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2019\/07\/Oceano-Aberto.jpg?fit=631%2C351&amp;ssl=1\" class=\"wp-image-6143 size-medium\" src=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2019\/07\/Oceano-Aberto.jpg?resize=300%2C167&#038;ssl=1\" alt=\"Oceano Aberto\" width=\"300\" height=\"167\" srcset=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2019\/07\/Oceano-Aberto.jpg?resize=300%2C167&amp;ssl=1 300w, https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2019\/07\/Oceano-Aberto.jpg?w=631&amp;ssl=1 631w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><figcaption id=\"caption-attachment-6143\" class=\"wp-caption-text\"><span style=\"font-size: 10pt; color: #000000;\"><a href=\"https:\/\/biologo.com.br\/bio\/oceano-aberto\/\">Oceano Aberto<\/a>.\u00a0<\/span><\/figcaption><\/figure>\n<p><span style=\"color: #000000;\">Acredita-se que os cet\u00e1ceos tenham evolu\u00eddo durante o Eoceno ou antes, compartilhando um ancestral comum mais pr\u00f3ximo com os hipop\u00f3tamos. Sendo mam\u00edferos, eles emergem para respirar ar.<\/span><\/p>\n<ul>\n<li><span style=\"font-size: 14pt; color: #0000ff;\"><a style=\"color: #0000ff;\" href=\"https:\/\/biologo.com.br\/bio\/oceanos\/\">Oceanos<\/a><\/span><\/li>\n<li><span style=\"font-size: 14pt; color: #0000ff;\"><a style=\"color: #0000ff;\" href=\"https:\/\/biologo.com.br\/bio\/origem-dos-mamiferos\/\">Origem dos mam\u00edferos<\/a><\/span><\/li>\n<li><span style=\"font-size: 14pt; color: #0000ff;\"><a style=\"color: #0000ff;\" href=\"https:\/\/biologo.com.br\/bio\/mamiferos-marinhos\/\">Mam\u00edferos marinhos<\/a><\/span><\/li>\n<\/ul>\n<p><span style=\"color: #000000;\">Eles t\u00eam 5 ossos de dedos (dedos iguais) em suas nadadeiras; eles amamentam seus filhos; e, apesar de seu estilo de vida totalmente aqu\u00e1tico, eles ret\u00eam muitas caracter\u00edsticas esquel\u00e9ticas de seus ancestrais terrestres.\u00a0<\/span><\/p>\n<p><span style=\"color: #000000;\">As duas modernas ordens de cet\u00e1ceos &#8211; Mysticeti (baleias de barbatanas) e Odontoceti (baleias dentadas) &#8211; s\u00e3o consideradas separadas uma da outra por volta de 28-33 milh\u00f5es de anos atr\u00e1s.<\/span><\/p>\n<blockquote><p><span style=\"color: #ffffff; font-size: 12pt;\"><strong><span style=\"font-family: 'courier new', courier, monospace;\">Uma pesquisa realizada no final da d\u00e9cada de 1970 no Paquist\u00e3o revelou v\u00e1rios est\u00e1gios na transi\u00e7\u00e3o dos cet\u00e1ceos da terra para o mar.\u00a0<\/span><\/strong><\/span><\/p><\/blockquote>\n<figure id=\"attachment_2655\" aria-describedby=\"caption-attachment-2655\" style=\"width: 300px\" class=\"wp-caption alignleft\"><a href=\"https:\/\/biologo.com.br\/bio\/o-litoral-brasileiro\/\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"2655\" data-permalink=\"https:\/\/biologo.com.br\/bio\/o-litoral-brasileiro\/golfinhos-rotadores\/\" data-orig-file=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2017\/07\/golfinhos-rotadores.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=\"golfinhos-rotadores\" data-image-description=\"&lt;p&gt;O Golfinho-rotador (Stenella Longirostris)&lt;\/p&gt;\n\" data-image-caption=\"&lt;p&gt;O Golfinho-rotador (Stenella Longirostris) by Liisa Havukainen&lt;\/p&gt;\n\" data-large-file=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2017\/07\/golfinhos-rotadores.jpg?fit=631%2C351&amp;ssl=1\" class=\"wp-image-2655 size-medium\" src=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2017\/07\/golfinhos-rotadores.jpg?resize=300%2C167&#038;ssl=1\" alt=\"O Golfinho-rotador\" width=\"300\" height=\"167\" srcset=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2017\/07\/golfinhos-rotadores.jpg?resize=300%2C167&amp;ssl=1 300w, https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2017\/07\/golfinhos-rotadores.jpg?w=631&amp;ssl=1 631w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><figcaption id=\"caption-attachment-2655\" class=\"wp-caption-text\"><span style=\"font-size: 10pt; color: #000000;\">Golfinho-rotador <span style=\"font-size: 8pt;\">(<em>Stenella Longirostris<\/em>) \u00a9Liisa Havukainen<\/span><\/span><\/figcaption><\/figure>\n<p><span style=\"color: #000000;\">A adapta\u00e7\u00e3o da ecolocaliza\u00e7\u00e3o animal nas baleias com dentes as distingue dos arqueocetos totalmente aqu\u00e1ticos e das primeiras baleias de barbatanas. <\/span><\/p>\n<p><span style=\"color: #000000;\">A presen\u00e7a de barbatanas em baleias de barbatanas ocorreu gradualmente, com variedades anteriores tendo muito poucas barbatanas, e seu tamanho est\u00e1 ligado \u00e0 depend\u00eancia de barbatanas (e subsequente aumento na alimenta\u00e7\u00e3o do filtro).<\/span><\/p>\n<h3><strong><span style=\"font-family: 'courier new', courier, monospace; font-size: 12pt;\">Origem<\/span><\/strong><\/h3>\n<p><span style=\"color: #000000;\">A teoria tradicional quanto \u00e0 evolu\u00e7\u00e3o dos cet\u00e1ceos propunha que as baleias estivessem relacionadas com os mesoniqu\u00eddeos, uma ordem extinta de ungulados carn\u00edvoros que se assemelhariam a lobos com cascos e que constitu\u00eda um grupo irm\u00e3o dos artiod\u00e1tilos. <\/span><\/p>\n<p><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"8087\" data-permalink=\"https:\/\/biologo.com.br\/bio\/evolucao-dos-cetaceos\/evolucao-dos-cetaceos-2\/\" data-orig-file=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2020\/11\/Evolucao-dos-Cetaceos.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=\"Evolu\u00e7\u00e3o-dos-Cet\u00e1ceos\" data-image-description=\"&lt;p&gt;A teoria tradicional quanto \u00e0 evolu\u00e7\u00e3o dos cet\u00e1ceos propunha que as baleias estivessem relacionadas com os mesoniqu\u00eddeos, uma ordem extinta de ungulados carn\u00edvoros que se assemelhariam a lobos com cascos e que constitu\u00eda um grupo irm\u00e3o dos artiod\u00e1tilos. Esta teoria fundamentou-se inicialmente nas semelhan\u00e7as entre os dentes triangulares pouco usuais dos mesoniqu\u00eddeos e os das baleias. Contudo, estudos mais recentes de filogenia molecular indicam que as baleias est\u00e3o mais proximamente relacionadas com os artiod\u00e1tilos, tendo os hipop\u00f3tamos como grupo n\u00e3o extinto mais proximamente aparentado.[2] Contudo, os primeiros antracoter\u00eddeos, antepassados dos hipop\u00f3tamos, n\u00e3o aparecem no registo f\u00f3ssil at\u00e9 ao Eoceno M\u00e9dio, milh\u00f5es de anos depois do aparecimento do g\u00e9nero Pakicetus, o primeiro antepassado &amp;#8220;exclusivo&amp;#8221; dos cet\u00e1ceos, que aparece no in\u00edcio do Eoceno, o que significa que os dois grupos ter\u00e3o divergido muito antes do Eoceno.&lt;\/p&gt;\n&lt;p&gt;Os dados moleculares s\u00e3o apoiados pela recente descoberta de f\u00f3sseis de Pakicetus, a mais antiga das protobaleias. Os esqueletos de Pakicetus mostram que as baleias n\u00e3o tiveram origem direta nos mesoniqu\u00eddeos. Pelo contr\u00e1rio, as baleias eram artiod\u00e1tilos que passaram a viver em meio aqu\u00e1tico pouco depois dos artiod\u00e1tilos terem divergido dos mesoniqu\u00eddeos.&lt;\/p&gt;\n\" data-image-caption=\"&lt;p&gt;Evolu\u00e7\u00e3o dos Cet\u00e1ceos&lt;\/p&gt;\n\" data-large-file=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2020\/11\/Evolucao-dos-Cetaceos.jpg?fit=631%2C351&amp;ssl=1\" class=\"alignright wp-image-8087 size-medium\" src=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2020\/11\/Evolucao-dos-Cetaceos.jpg?resize=300%2C167&#038;ssl=1\" alt=\"Evolu\u00e7\u00e3o dos Cet\u00e1ceos\" width=\"300\" height=\"167\" srcset=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2020\/11\/Evolucao-dos-Cetaceos.jpg?resize=300%2C167&amp;ssl=1 300w, https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2020\/11\/Evolucao-dos-Cetaceos.jpg?w=631&amp;ssl=1 631w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/p>\n<p><span style=\"color: #000000;\">Esta teoria fundamentou-se inicialmente nas semelhan\u00e7as entre os dentes triangulares pouco usuais dos mesoniqu\u00eddeos e os das baleias. Contudo, estudos mais recentes de filogenia molecular indicam que as baleias est\u00e3o mais proximamente relacionadas com os artiod\u00e1tilos, tendo os hipop\u00f3tamos como grupo n\u00e3o extinto mais proximamente aparentado.<\/span><\/p>\n<p><span style=\"color: #000000;\"> Por\u00e9m, os primeiros antracoter\u00eddeos, antepassados dos hipop\u00f3tamos, n\u00e3o aparecem no registo f\u00f3ssil at\u00e9 ao Eoceno M\u00e9dio, milh\u00f5es de anos depois do aparecimento do g\u00eanero Pakicetus, o primeiro antepassado &#8220;exclusivo&#8221; dos cet\u00e1ceos, que aparece no in\u00edcio do Eoceno, o que significa que os dois grupos ter\u00e3o divergido muito antes do Eoceno.<\/span><\/p>\n<p><span style=\"color: #000000;\">Os dados moleculares s\u00e3o apoiados pela recente descoberta de f\u00f3sseis de Pakicetus, a mais antiga das protobaleias. Os esqueletos de Pakicetus mostram que as baleias n\u00e3o tiveram origem direta nos mesoniqu\u00eddeos. Pelo contr\u00e1rio, as baleias eram artiod\u00e1tilos que passaram a viver em meio aqu\u00e1tico pouco depois dos artiod\u00e1tilos terem divergido dos mesoniqu\u00eddeos.<\/span><\/p>\n<h4><span style=\"color: #000000; font-family: 'courier new', courier, monospace; font-size: 8pt;\">Estudos e refer\u00eancias:<\/span><\/h4>\n<ul>\n<li><span style=\"font-size: 8pt;\">\u00a0L. Fenton, Carroll; V. Rich, Pat; A. Fenton, Mildred; H. V. Rich, Thomas (1996).\u00a0&#8220;The Early Mammals&#8221;.\u00a0<a href=\"https:\/\/books.google.com.br\/books\/about\/The_Fossil_Book.html?id=_ntSspji0LYC&amp;redir_esc=y\" target=\"_blank\" rel=\"noopener\">The Fossil Book: A Record of Prehistoric Life<\/a>. Dover Publishing.\u00a0<\/span><\/li>\n<li><span style=\"font-size: 8pt;\">Uhen, (2010).\u00a0<a class=\"external text\" href=\"http:\/\/www.annualreviews.org\/doi\/abs\/10.1146\/annurev-earth-040809-152453\" rel=\"nofollow\">The Origin(s) of Whales. Annual Review of Earth and Planetary Sciences.<\/a>\u00a038: 189\u2013219.<\/span><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Evolu\u00e7\u00e3o dos Cet\u00e1ceos: Acredita-se que a evolu\u00e7\u00e3o dos cet\u00e1ceos tenha come\u00e7ado no subcontinente indiano, a partir de ungulados com dedos<\/p>\n","protected":false},"author":1,"featured_media":8087,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"video","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_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"Acredita-se que a evolu\u00e7\u00e3o dos cet\u00e1ceos tenha come\u00e7ado no subcontinente indiano, a partir de ungulados com dedos pares h\u00e1 50 milh\u00f5es de anos. Confira curiosidades sobre a origem desses mam\u00edferos marinhos no document\u00e1rio Evolu\u00e7\u00e3o dos Cet\u00e1ceos.","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":[4,121,25,126],"tags":[],"class_list":["post-8083","post","type-post","status-publish","format-video","has-post-thumbnail","hentry","category-biologiamarinha","category-evolucao","category-mamiferos","category-videos","post_format-post-format-video"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Evolu\u00e7\u00e3o dos Cet\u00e1ceos: Document\u00e1rio - Biologia Marinha - Bi\u00f3logo<\/title>\n<meta name=\"description\" content=\"Curiosidades sobre a origem e evolu\u00e7\u00e3o dos Cet\u00e1ceos. 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