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interwiki-az mw-list-item"><a href="https://az.wikipedia.org/wiki/Ambulacraria" title="Ambulacraria – Azerbaijani" lang="az" hreflang="az" data-title="Ambulacraria" data-language-autonym="Azərbaycanca" data-language-local-name="Azerbaijani" class="interlanguage-link-target"><span>Azərbaycanca</span></a></li><li class="interlanguage-link interwiki-bs mw-list-item"><a href="https://bs.wikipedia.org/wiki/Ambulacraria" title="Ambulacraria – Bosnian" lang="bs" hreflang="bs" data-title="Ambulacraria" data-language-autonym="Bosanski" data-language-local-name="Bosnian" class="interlanguage-link-target"><span>Bosanski</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Ambulacraris" title="Ambulacraris – Catalan" lang="ca" hreflang="ca" data-title="Ambulacraris" data-language-autonym="Català" data-language-local-name="Catalan" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Ambulacraria" title="Ambulacraria – Czech" lang="cs" hreflang="cs" data-title="Ambulacraria" data-language-autonym="Čeština" data-language-local-name="Czech" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Ambulacraria" title="Ambulacraria – German" lang="de" hreflang="de" data-title="Ambulacraria" data-language-autonym="Deutsch" data-language-local-name="German" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Ambulacraria" title="Ambulacraria – Spanish" lang="es" hreflang="es" data-title="Ambulacraria" data-language-autonym="Español" data-language-local-name="Spanish" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Ambulacraria" title="Ambulacraria – Basque" lang="eu" hreflang="eu" data-title="Ambulacraria" data-language-autonym="Euskara" data-language-local-name="Basque" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D9%BE%D8%A7%DA%AF%D8%B1%D8%AF%D8%AF%D8%A7%D8%B1%D8%A7%D9%86" title="پاگردداران – Persian" lang="fa" hreflang="fa" data-title="پاگردداران" data-language-autonym="فارسی" data-language-local-name="Persian" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Ambulacraria" title="Ambulacraria – French" lang="fr" hreflang="fr" data-title="Ambulacraria" data-language-autonym="Français" data-language-local-name="French" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EC%95%94%EB%B6%88%EB%9D%BC%ED%81%AC%EB%9D%BC%EB%A6%AC%EC%95%84" title="암불라크라리아 – Korean" lang="ko" hreflang="ko" data-title="암불라크라리아" data-language-autonym="한국어" data-language-local-name="Korean" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Ambulacraria" title="Ambulacraria – Indonesian" lang="id" hreflang="id" data-title="Ambulacraria" data-language-autonym="Bahasa Indonesia" data-language-local-name="Indonesian" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-arz mw-list-item"><a href="https://arz.wikipedia.org/wiki/%D9%82%D9%86%D8%A7%D8%A8%D9%8A%D8%A7%D8%AA_%D8%A7%D9%84%D8%AD%D8%B1%D9%83%D9%87" title="قنابيات الحركه – Egyptian Arabic" lang="arz" hreflang="arz" data-title="قنابيات الحركه" data-language-autonym="مصرى" data-language-local-name="Egyptian Arabic" class="interlanguage-link-target"><span>مصرى</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/Ambulacraria" title="Ambulacraria – Malay" lang="ms" hreflang="ms" data-title="Ambulacraria" data-language-autonym="Bahasa Melayu" data-language-local-name="Malay" class="interlanguage-link-target"><span>Bahasa Melayu</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Ambulacraria" title="Ambulacraria – Dutch" lang="nl" hreflang="nl" data-title="Ambulacraria" data-language-autonym="Nederlands" data-language-local-name="Dutch" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Ambulacraria" title="Ambulacraria – Polish" lang="pl" hreflang="pl" data-title="Ambulacraria" data-language-autonym="Polski" data-language-local-name="Polish" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Ambulacraria" title="Ambulacraria – Portuguese" lang="pt" hreflang="pt" data-title="Ambulacraria" data-language-autonym="Português" data-language-local-name="Portuguese" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ro mw-list-item"><a href="https://ro.wikipedia.org/wiki/Ambulacraria" title="Ambulacraria – Romanian" lang="ro" hreflang="ro" data-title="Ambulacraria" data-language-autonym="Română" data-language-local-name="Romanian" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/Ambulacraria" title="Ambulacraria – Russian" lang="ru" hreflang="ru" data-title="Ambulacraria" data-language-autonym="Русский" data-language-local-name="Russian" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/Ambulacraria" title="Ambulacraria – Ukrainian" lang="uk" hreflang="uk" data-title="Ambulacraria" data-language-autonym="Українська" data-language-local-name="Ukrainian" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E6%AD%A5%E5%B8%A6%E5%8A%A8%E7%89%A9" title="步带动物 – Chinese" lang="zh" hreflang="zh" data-title="步带动物" data-language-autonym="中文" data-language-local-name="Chinese" class="interlanguage-link-target"><span>中文</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q136956#sitelinks-wikipedia" title="Edit interlanguage links" class="wbc-editpage">Edit links</a></span></div> </div> </div> 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class="infobox biota" style="text-align: left; width: 200px; font-size: 100%"> <tbody><tr> <th colspan="2" style="color:inherit; text-align: center; background-color: rgb(235,235,210)">Ambulacrarians<br /><div style="font-size: 85%;">Temporal range: <span class="noprint"><span style="display:inline-block;"></span><span style="display:inline-block;">Early Cambrian–Recent</span> <span style="display:inline-block;"></span><div id="Timeline-row" style="margin: 4px auto 0; clear:both; width:220px; padding:0px; height:18px; overflow:visible; white-space:nowrap; border:1px #666; border-style:solid none; position:relative; z-index:0; font-size:97%;"> <div style="position:absolute; height:100%; left:0px; width:207.23076923077px; padding-left:5px; text-align:left; background-color:rgb(254,217,106); background-image: linear-gradient(to right, rgba(255,255,255,1), rgba(254,217,106,1) 15%, rgba(254,217,106,1));"><a href="/wiki/Precambrian" title="Precambrian">PreꞒ</a></div> <div style="position:absolute; height:100%; text-align:center; background-color:rgb(127,160,86); left:37.636923076923px; width:18.073846153846px;"><a href="/wiki/Cambrian" title="Cambrian">Ꞓ</a></div> <div style="position:absolute; height:100%; text-align:center; background-color:rgb(0,146,112); left:55.710769230769px; width:14.08px;"><a href="/wiki/Ordovician" title="Ordovician">O</a></div> <div style="position:absolute; height:100%; text-align:center; background-color:rgb(179,225,182); left:69.790769230769px; width:8.3261538461539px;"><a href="/wiki/Silurian" title="Silurian">S</a></div> <div style="position:absolute; height:100%; text-align:center; background-color:rgb(203,140,55); left:78.116923076923px; width:20.409230769231px;"><a href="/wiki/Devonian" title="Devonian">D</a></div> <div style="position:absolute; height:100%; text-align:center; background-color:rgb(103,165,153); left:98.526153846154px; width:20.307692307692px;"><a href="/wiki/Carboniferous" title="Carboniferous">C</a></div> <div style="position:absolute; height:100%; text-align:center; background-color:rgb(240,64,40); left:118.83384615385px; width:15.907015384615px;"><a href="/wiki/Permian" title="Permian">P</a></div> <div style="position:absolute; height:100%; text-align:center; background-color:rgb(129,43,146); left:134.74086153846px; width:17.092984615385px;"><a href="/wiki/Triassic" title="Triassic">T</a></div> <div style="position:absolute; height:100%; text-align:center; background-color:rgb(52,178,201); left:151.83384615385px; width:19.089230769231px;"><a href="/wiki/Jurassic" title="Jurassic">J</a></div> <div style="position:absolute; height:100%; text-align:center; background-color:rgb(127,198,78); left:170.92307692308px; width:26.738461538462px;"><a href="/wiki/Cretaceous" title="Cretaceous">K</a></div> <div style="position:absolute; height:100%; text-align:center; background-color:rgb(253,154,82); left:197.66153846154px; width:14.543692307692px;"><a href="/wiki/Paleogene" title="Paleogene">Pg</a></div> <div style="position:absolute; height:100%; text-align:center; background-color:rgb(255,230,25); left:212.20523076923px; width:6.9215384615385px;"><a href="/wiki/Neogene" title="Neogene">N</a></div> <div id="end-border" style="position:absolute; height:100%; background-color:#666; width:1px; left:219px"></div><div style="margin:0 auto; line-height:0; clear:both; width:220px; padding:0px; height:8px; overflow:visible; background-color:transparent; position:relative; top:-4px; z-index:100;"><div style="position:absolute; height:8px; left:37.636923076923px; width:182.36307692308px; background-color:#360; opacity:0.42;"></div> <div style="position:absolute; height:8px; left:37.636923076923px; width:182.36307692308px; background-color:#360; opacity:1;"></div> <div style="position:absolute; height:6px; top:1px; left:38.636923076923px; width:180.36307692308px; background-color:#6c3;"></div> </div> </div></span></div> </th></tr> <tr> <td colspan="2" style="text-align: center"><span class="mw-default-size" typeof="mw:File/Frameless"><a href="/wiki/File:Nerr0878.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/e/e9/Nerr0878.jpg/220px-Nerr0878.jpg" decoding="async" width="220" height="151" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/e/e9/Nerr0878.jpg/330px-Nerr0878.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/e/e9/Nerr0878.jpg/440px-Nerr0878.jpg 2x" data-file-width="1800" data-file-height="1236" /></a></span> </td></tr> <tr> <td colspan="2" style="text-align: center; font-size: 88%">Various <a href="/wiki/Sea_star" class="mw-redirect" title="Sea star">sea stars</a> and <a href="/wiki/Sea_urchin" title="Sea urchin">sea urchins</a> among mussel shells in the rocky <a href="/wiki/Intertidal_zone" title="Intertidal zone">intertidal zone</a> of <a href="/wiki/Kachemak_Bay" title="Kachemak Bay">Kachemak Bay</a>, southern Alaska, United States </td></tr> <tr> <th colspan="2" style="color:inherit; min-width:15em; text-align: center; background-color: rgb(235,235,210)"><a href="/wiki/Taxonomy_(biology)" title="Taxonomy (biology)">Scientific classification</a> <span class="plainlinks taxobox-edit-taxonomy skin-invert" style="font-size:smaller; float:right; padding-right:0.4em; margin-left:-3em;"><span typeof="mw:File"><a href="/wiki/Template:Taxonomy/Ambulacraria" title="Edit this classification"><img alt="Edit this classification" src="//upload.wikimedia.org/wikipedia/commons/thumb/8/8a/OOjs_UI_icon_edit-ltr.svg/15px-OOjs_UI_icon_edit-ltr.svg.png" decoding="async" width="15" height="15" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/8a/OOjs_UI_icon_edit-ltr.svg/23px-OOjs_UI_icon_edit-ltr.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/8/8a/OOjs_UI_icon_edit-ltr.svg/30px-OOjs_UI_icon_edit-ltr.svg.png 2x" data-file-width="20" data-file-height="20" /></a></span></span> </th></tr> <tr> <td>Domain: </td> <td><a href="/wiki/Eukaryote" title="Eukaryote">Eukaryota</a> </td></tr> <tr> <td>Kingdom: </td> <td><a href="/wiki/Animal" title="Animal">Animalia</a> </td></tr> <tr> <td>Subkingdom: </td> <td><a href="/wiki/Eumetazoa" title="Eumetazoa">Eumetazoa</a> </td></tr> <tr> <td><i>Clade</i>: </td> <td><a href="/wiki/ParaHoxozoa" title="ParaHoxozoa">ParaHoxozoa</a> </td></tr> <tr> <td><i>Clade</i>: </td> <td><a href="/wiki/Bilateria" title="Bilateria">Bilateria</a> </td></tr> <tr> <td><i>Clade</i>: </td> <td><a href="/wiki/Nephrozoa" title="Nephrozoa">Nephrozoa</a> </td></tr> <tr> <td>Superphylum: </td> <td><a href="/wiki/Deuterostome" title="Deuterostome">Deuterostomia</a> </td></tr> <tr> <td><i>Clade</i>: </td> <td><a class="mw-selflink selflink">Ambulacraria</a><br /><small>Metschnikoff, 1881</small> </td></tr> <tr> <th colspan="2" style="color:inherit; text-align: center; background-color: rgb(235,235,210)">Phyla </th></tr> <tr> <td colspan="2" style="text-align: left"> <ul><li><a href="/wiki/Echinodermata" class="mw-redirect" title="Echinodermata">Echinodermata</a></li> <li><a href="/wiki/Hemichordata" class="mw-redirect" title="Hemichordata">Hemichordata</a></li></ul> </td></tr> </tbody></table><style data-mw-deduplicate="TemplateStyles:r1238732961">@media screen{html.skin-theme-clientpref-night .mw-parser-output .infobox.biota tr{background:transparent!important}html.skin-theme-clientpref-night .mw-parser-output .infobox.biota img{background:transparent}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .infobox.biota tr{background:transparent!important}html.skin-theme-clientpref-os .mw-parser-output .infobox.biota img{background:white}}.mw-parser-output .infobox.biota .taxobox-edit-taxonomy img{background:transparent!important}body.skin-vector .mw-parser-output table.biota.infobox{margin-top:0.5em}body.skin--responsive .mw-parser-output table.biota.infobox tr.taxonrow td{padding:2px 10px}</style> <p><b>Ambulacraria</b> <span class="rt-commentedText nowrap"><span class="IPA nopopups noexcerpt" lang="en-fonipa"><a href="/wiki/Help:IPA/English" title="Help:IPA/English">/<span style="border-bottom:1px dotted"><span title="/ˌ/: secondary stress follows">ˌ</span><span title="/æ/: 'a' in 'bad'">æ</span><span title="'m' in 'my'">m</span><span title="'b' in 'buy'">b</span><span title="/j/: 'y' in 'yes'">j</span><span title="/uː/: 'oo' in 'goose'">uː</span><span title="'l' in 'lie'">l</span><span title="/ə/: 'a' in 'about'">ə</span><span title="/ˈ/: primary stress follows">ˈ</span><span title="'k' in 'kind'">k</span><span title="'r' in 'rye'">r</span><span title="/ɛər/: 'are' in 'bare'">ɛər</span><span title="/i/: 'y' in 'happy'">i</span><span title="/ə/: 'a' in 'about'">ə</span></span>/</a></span></span>, or <b>Coelomopora</b> <span class="rt-commentedText nowrap"><span class="IPA nopopups noexcerpt" lang="en-fonipa"><a href="/wiki/Help:IPA/English" title="Help:IPA/English">/<span style="border-bottom:1px dotted"><span title="'s' in 'sigh'">s</span><span title="/iː/: 'ee' in 'fleece'">iː</span><span title="'l' in 'lie'">l</span><span title="/ə/: 'a' in 'about'">ə</span><span title="/ˈ/: primary stress follows">ˈ</span><span title="'m' in 'my'">m</span><span title="/ɒ/: 'o' in 'body'">ɒ</span><span title="'p' in 'pie'">p</span><span title="/ə/: 'a' in 'about'">ə</span><span title="'r' in 'rye'">r</span><span title="/ə/: 'a' in 'about'">ə</span></span>/</a></span></span>, is a clade of <a href="/wiki/Invertebrate" title="Invertebrate">invertebrate</a> phyla that includes <a href="/wiki/Echinoderm" title="Echinoderm">echinoderms</a> and <a href="/wiki/Hemichordate" title="Hemichordate">hemichordates</a>;<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> a member of this group is called an <b>ambulacrarian</b>. <a href="/wiki/Phylogenetic" class="mw-redirect" title="Phylogenetic">Phylogenetic</a> analysis suggests the echinoderms and hemichordates separated around 533 million years ago.<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> The Ambulacraria are part of the <a href="/wiki/Deuterostome" title="Deuterostome">deuterostomes</a>, a clade that also includes the many <a href="/wiki/Chordata" class="mw-redirect" title="Chordata">Chordata</a>, and the few extinct species belonging to the <a href="/wiki/Vetulicolia" title="Vetulicolia">Vetulicolia</a>. </p><p>The two living clades with representative organisms are: </p> <ul><li><a href="/wiki/Echinodermata" class="mw-redirect" title="Echinodermata">Echinodermata</a> (<a href="/wiki/Sea_star" class="mw-redirect" title="Sea star">sea stars</a>, <a href="/wiki/Sea_urchin" title="Sea urchin">sea urchins</a>, <a href="/wiki/Brittle_star" title="Brittle star">brittle stars</a>, <a href="/wiki/Holothuroidea" class="mw-redirect" title="Holothuroidea">sea cucumbers</a>, <a href="/wiki/Feather_star" class="mw-redirect" title="Feather star">feather stars</a>, sea lilies, etc.)</li> <li><a href="/wiki/Hemichordata" class="mw-redirect" title="Hemichordata">Hemichordata</a> (<a href="/wiki/Acorn_worm" title="Acorn worm">acorn worms</a>, <a href="/wiki/Pterobranchia" title="Pterobranchia">Pterobranchia</a>, and possibly <a href="/wiki/Graptolite" title="Graptolite">graptolites</a>)</li></ul> <p>(These together sometimes are called the <i>lower <a href="/wiki/Deuterostome" title="Deuterostome">deuterostomes</a></i>.<sup id="cite_ref-Lacalli_3-0" class="reference"><a href="#cite_note-Lacalli-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup>) </p><p>Whether the <a href="/wiki/Xenacoelomorpha" title="Xenacoelomorpha">Xenacoelomorpha</a> clade is the sister group to the Ambulacraria remains a contentious issue, with some authors arguing that the former should be placed more basally among <a href="/wiki/Metazoan" class="mw-redirect" title="Metazoan">metazoans</a>,<sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> and other authors asserting that the best choices of phylogenetic methods support the position of Xenacoelomorpha as the sister group to Ambulacraria.<sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-8" class="reference"><a href="#cite_note-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Fossil_ambulacrarians">Fossil ambulacrarians</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Ambulacraria&action=edit&section=1" title="Edit section: Fossil ambulacrarians"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Fossil taxa that may lie on the stem lineage: </p> <ul><li>Superphylum Ambulacraria (<a href="/wiki/Total_group" class="mw-redirect" title="Total group">total group</a>) <ul><li><a href="/wiki/Cambroernida" class="mw-redirect" title="Cambroernida">Cambroernida</a> (unranked clade)<sup id="cite_ref-Caron_2010_9-0" class="reference"><a href="#cite_note-Caron_2010-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-li2023_10-0" class="reference"><a href="#cite_note-li2023-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup> <ul><li><i><a href="/wiki/Herpetogaster" title="Herpetogaster">Herpetogaster</a></i></li> <li><i><a href="/wiki/Phlogites" title="Phlogites">Phlogites</a></i></li> <li>Superfamily <a href="/wiki/Eldoniidae" class="mw-redirect" title="Eldoniidae">Eldonioidea</a> <ul><li>Family <a href="/wiki/Eldoniidae" class="mw-redirect" title="Eldoniidae">Eldoniidae</a></li> <li>Family <a href="/wiki/Rotadiscidae" class="mw-redirect" title="Rotadiscidae">Rotadiscidae</a></li> <li><i><a href="/wiki/Paropsonema" title="Paropsonema">Paropsonema</a></i></li></ul></li></ul></li> <li><i><a href="/wiki/Yanjiahella" title="Yanjiahella">Yanjiahella</a></i><sup id="cite_ref-zamora_11-0" class="reference"><a href="#cite_note-zamora-11"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup></li></ul></li></ul> <div class="mw-heading mw-heading2"><h2 id="Ontogeny">Ontogeny</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Ambulacraria&action=edit&section=2" title="Edit section: Ontogeny"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>As for many animals, the <a href="/wiki/Egg_cell" title="Egg cell">egg cell</a> of any <a href="/wiki/Extant_taxon" class="mw-redirect" title="Extant taxon">extant</a> ambulacrarian divides and develops into a <a href="/wiki/Blastula" class="mw-redirect" title="Blastula">blastula</a> ("cell ball"), which develops into a <a href="/wiki/Triploblast" class="mw-redirect" title="Triploblast">triploblast</a> ("three-layered") <a href="/wiki/Gastrula" class="mw-redirect" title="Gastrula">gastrula</a>. The gastrula then develops into a <a href="/wiki/Dipleurula" title="Dipleurula">dipleurula</a> larva form in the Asteroidea, Holothuroidea, Crinoidea, and Hemichordata, and into a <a href="/wiki/Echinoderm#Larval_development" title="Echinoderm">pluteus</a> larva form in the Echinoidea and Ophiuroidea.<sup id="cite_ref-Lacalli_3-1" class="reference"><a href="#cite_note-Lacalli-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-12" class="reference"><a href="#cite_note-12"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup> This, in its turn, is developed in various different kinds of larvae for different taxa of ambulacrarians. </p><p>It has been suggested that the adult form of the <a href="/wiki/Last_common_ancestor" class="mw-redirect" title="Last common ancestor">last common ancestor</a> of the ambulacrarians was <a href="/wiki/Anatomy" title="Anatomy">anatomically</a> similar to the dipleurula larva; this hypothetic ancestor sometimes also is called dipleurula.<sup id="cite_ref-13" class="reference"><a href="#cite_note-13"><span class="cite-bracket">[</span>13<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Ambulacraria&action=edit&section=3" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist"> <div class="mw-references-wrap mw-references-columns"><ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-1">^</a></b></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite id="CITEREFCannonVellutiniSmithRonquist2016" class="citation journal cs1">Cannon, Johanna Taylor; 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navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Animalia" title="Template:Animalia"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Animalia" title="Template talk:Animalia"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Animalia" title="Special:EditPage/Template:Animalia"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Extant_animal_phyla" style="font-size:114%;margin:0 4em">Extant <a href="/wiki/Animal" title="Animal">animal</a> <a href="/wiki/Phylum" title="Phylum">phyla</a></div></th></tr><tr><td class="navbox-abovebelow" colspan="2" style="background:rgb(235,235,210)"><div><div class="hlist"> <dl><dt><span class="nobold"><a href="/wiki/Domain_(biology)" title="Domain (biology)">Domain</a></span></dt> <dd><a href="/wiki/Template:Archaea_classification" title="Template:Archaea classification">Archaea</a></dd> <dd><a href="/wiki/Template:Bacteria_classification" title="Template:Bacteria classification">Bacteria</a></dd> <dd><a href="/wiki/Template:Eukaryota" title="Template:Eukaryota">Eukaryota</a></dd> <dt><span class="nobold">(major groups</span></dt> <dd><a href="/wiki/Template:Excavata" title="Template:Excavata">Excavata</a></dd> <dd><a href="/wiki/Diaphoretickes" title="Diaphoretickes">Diaphoretickes</a> <dl><dd><a href="/wiki/Template:Hacrobia" title="Template:Hacrobia">Hacrobia</a> <dl><dd><a href="/wiki/Template:Cryptista" title="Template:Cryptista">Cryptista</a></dd></dl></dd> <dd><a href="/wiki/Template:Rhizaria" title="Template:Rhizaria">Rhizaria</a></dd> <dd><a href="/wiki/Template:Alveolata" title="Template:Alveolata">Alveolata</a></dd> <dd><a href="/wiki/Template:Stramenopile" title="Template:Stramenopile">Stramenopiles</a></dd> <dd><a href="/wiki/Template:Plant_classification" title="Template:Plant classification">Plants</a></dd></dl></dd> <dd><a href="/wiki/Amorphea" title="Amorphea">Amorphea</a> <dl><dd><a href="/wiki/Template:Amoebozoa" title="Template:Amoebozoa">Amoebozoa</a></dd> <dd><a href="/wiki/Template:Opisthokont_protists" title="Template:Opisthokont protists">Opisthokonta</a> <dl><dd><a href="/wiki/Template:Animalia" title="Template:Animalia">Animals</a></dd> <dd><a href="/wiki/Template:Fungi_classification" title="Template:Fungi classification">Fungi</a></dd> <dd><a href="/wiki/Template:Mesomycetozoea" title="Template:Mesomycetozoea">Mesomycetozoea</a>)</dd></dl></dd></dl></dd></dl> </div></div></td></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Animalia" scope="row" class="navbox-group" style="background:rgb(245,245,232);width:1%;background:rgb(235,235,210)"><span style="margin: -25px; display: inline-block; -webkit-transform: rotate(270deg); -moz-transform: rotate(270deg); -ms-transform: rotate(270deg); -o-transform: rotate(270deg); transform: rotate(270deg);"><a href="/wiki/Animal" title="Animal">Animalia</a></span></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Sponge" title="Sponge"><b>Porifera (sponges)</b></a></li> <li><a href="/wiki/Ctenophora" title="Ctenophora">Ctenophora (comb jellies)</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background:rgb(235,235,210)"><a href="/wiki/ParaHoxozoa" title="ParaHoxozoa">ParaHoxozoa</a><br />(<a href="/wiki/Planulozoa" title="Planulozoa">Planulozoa</a>)</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><td colspan="2" class="navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Placozoa" title="Placozoa">Placozoa (<i>Trichoplax</i> and relatives)</a></li> <li><a href="/wiki/Cnidaria" title="Cnidaria"><b>Cnidaria (jellyfish and relatives)</b></a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background:rgb(235,235,210)"><a href="/wiki/Bilateria" title="Bilateria">Bilateria</a> (Triploblasts)</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li>(see below↓)</li></ul> </div></td></tr></tbody></table><div></div></td></tr></tbody></table><div></div></td></tr><tr><td class="navbox-abovebelow" colspan="2" style="background:rgb(245,245,232)"><div> <dl><dt><span class="nobold">The <a href="/wiki/Phylogenetic_tree" title="Phylogenetic tree">phylogeny</a> of the animal root <a href="/wiki/Animal#Internal_phylogeny" title="Animal">is disputed</a>; see also</span></dt> <dd><a href="/wiki/Eumetazoa" title="Eumetazoa">Eumetazoa</a></dd> <dd><a href="/wiki/Benthozoa" title="Benthozoa">Benthozoa</a></dd></dl> </div></td></tr></tbody></table><div></div></td></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks mw-collapsible uncollapsed navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="col" class="navbox-title" colspan="2" style="background:rgb(235,235,210)"><div id="Bilateria" style="font-size:114%;margin:0 4em"><a href="/wiki/Bilateria" title="Bilateria">Bilateria</a></div></th></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Bilateria" scope="row" class="navbox-group" style="background:rgb(245,245,232);width:1%;background:rgb(235,235,210)"><span style="margin: -24px; display: inline-block; -webkit-transform: rotate(270deg); -moz-transform: rotate(270deg); -ms-transform: rotate(270deg); -o-transform: rotate(270deg); transform: rotate(270deg);"><a href="/wiki/Bilateria" title="Bilateria">Bilateria</a></span></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Xenacoelomorpha" title="Xenacoelomorpha">Xenacoelomorpha (acoels and relatives)</a></li> <li><b><a href="/wiki/Chordate" title="Chordate">Chordata (chordates)</a></b></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background:rgb(235,235,210)"><a class="mw-selflink selflink">Ambulacraria</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><td colspan="2" class="navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Echinoderm" title="Echinoderm"><b>Echinodermata (starfish and relatives)</b></a></li> <li><a href="/wiki/Hemichordate" title="Hemichordate">Hemichordata (acorn worms and relatives)</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Protostomia" scope="row" class="navbox-group" style="width:1%;background:rgb(235,235,210)"><span style="margin: -35px; display: inline-block; -webkit-transform: rotate(270deg); -moz-transform: rotate(270deg); -ms-transform: rotate(270deg); -o-transform: rotate(270deg); transform: rotate(270deg);"><a href="/wiki/Protostome" title="Protostome">Protostomia</a></span></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%;background:rgb(235,235,210)"><span style="margin: -30px; display: inline-block; -webkit-transform: rotate(270deg); -moz-transform: rotate(270deg); -ms-transform: rotate(270deg); -o-transform: rotate(270deg); transform: rotate(270deg);"><a href="/wiki/Ecdysozoa" title="Ecdysozoa">Ecdysozoa</a></span></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Scalidophora" scope="row" class="navbox-group" style="width:1%;background:rgb(235,235,210)"><a href="/wiki/Scalidophora" title="Scalidophora">Scalidophora</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Kinorhyncha" title="Kinorhyncha">Kinorhyncha (mud dragons)</a></li> <li><a href="/wiki/Priapulida" title="Priapulida">Priapulida (penis worms)</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background:rgb(235,235,210)">N+L+P</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Nematoida" scope="row" class="navbox-group" style="width:1%;background:rgb(235,235,210)"><a href="/wiki/Nematoida" title="Nematoida">Nematoida</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Nematode" title="Nematode"><b>Nematoda (roundworms)</b></a></li> <li><a href="/wiki/Nematomorpha" title="Nematomorpha">Nematomorpha (horsehair worms)</a></li></ul> </div></td></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="L+P" scope="row" class="navbox-group" style="width:1%;background:rgb(235,235,210)">L+P</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Loricifera" title="Loricifera">Loricifera (corset animals)</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background:rgb(235,235,210)"><a href="/wiki/Panarthropoda" title="Panarthropoda">Panarthropoda</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><td colspan="2" class="navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Onychophora" title="Onychophora">Onychophora (velvet worms)</a></li> <li><a href="/wiki/Arthropod" title="Arthropod"><b>Arthropoda (arthropods)</b></a></li> <li><a href="/wiki/Tardigrade" title="Tardigrade"><b>Tardigrada (waterbears)</b></a></li></ul> </div></td></tr></tbody></table><div></div></td></tr></tbody></table><div></div></td></tr></tbody></table><div></div></td></tr></tbody></table><div></div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background:rgb(235,235,210)"><span style="margin: -20px; display: inline-block; -webkit-transform: rotate(270deg); -moz-transform: rotate(270deg); -ms-transform: rotate(270deg); -o-transform: rotate(270deg); transform: rotate(270deg);"><a href="/wiki/Spiralia" title="Spiralia">Spiralia</a></span></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Gnathifera" scope="row" class="navbox-group" style="width:1%;background:rgb(235,235,210)"><a href="/wiki/Gnathifera_(Spiralia)" title="Gnathifera (Spiralia)">Gnathifera</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Chaetognatha" title="Chaetognatha">Chaetognatha (arrow worms)</a></li> <li><a href="/wiki/Gnathostomulid" title="Gnathostomulid">Gnathostomulida (jaw worms)</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background:rgb(235,235,210)">M+S</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Limnognathia" title="Limnognathia">Micrognathozoa <i>(Limnognathia)</i></a></li> <li><a href="/wiki/Syndermata" title="Syndermata">Syndermata</a> <ul><li><b><a href="/wiki/Rotifer" title="Rotifer">Rotifera (wheel animals)</a></b></li> <li><b><a href="/wiki/Acanthocephala" title="Acanthocephala">Acanthocephala (thorny-headed worms)</a></b></li></ul></li></ul> </div></td></tr></tbody></table><div></div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background:rgb(235,235,210)"><span style="margin: -41px; display: inline-block; -webkit-transform: rotate(270deg); -moz-transform: rotate(270deg); -ms-transform: rotate(270deg); -o-transform: rotate(270deg); transform: rotate(270deg);"><a href="/wiki/Platytrochozoa" title="Platytrochozoa">Platytrochozoa</a></span></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="R+M" scope="row" class="navbox-group" style="width:1%;background:rgb(235,235,210)">R+M</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%;background:rgb(235,235,210)"><a href="/wiki/Rouphozoa" class="mw-redirect" title="Rouphozoa">Rouphozoa</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Flatworm" title="Flatworm"><b>Platyhelminthes (flatworms)</b></a></li> <li><a href="/wiki/Gastrotrich" title="Gastrotrich">Gastrotricha (hairybacks)</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background:rgb(235,235,210)"><a href="/wiki/Mesozoa" title="Mesozoa">Mesozoa</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Orthonectida" title="Orthonectida">Orthonectida</a></li> <li><a href="/wiki/Dicyemida" title="Dicyemida">Dicyemida or Rhombozoa</a></li> <li><a href="/wiki/Salinella" title="Salinella">Monoblastozoa (<i>Salinella</i>)</a>†</li></ul> </div></td></tr></tbody></table><div></div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background:rgb(235,235,210)"><span style="margin: -44px; display: inline-block; -webkit-transform: rotate(270deg); -moz-transform: rotate(270deg); -ms-transform: rotate(270deg); -o-transform: rotate(270deg); transform: rotate(270deg);"><a href="/wiki/Lophotrochozoa" title="Lophotrochozoa">Lophotrochozoa</a></span></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Symbion" title="Symbion">Cycliophora (<i>Symbion</i>)</a></li> <li><a href="/wiki/Annelid" title="Annelid"><b>Annelida (segmented worms)</b></a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background:rgb(235,235,210)">M+K</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><td colspan="2" class="navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Mollusca" title="Mollusca"><b>Mollusca (molluscs)</b></a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background:rgb(235,235,210)"><a href="/wiki/Kryptotrochozoa" title="Kryptotrochozoa">Kryptotrochozoa</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Nemertea" title="Nemertea"><b>Nemertea (ribbon worms)</b></a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background:rgb(235,235,210)"><a href="/wiki/Lophophorata" title="Lophophorata">Lophophorata</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%;background:rgb(235,235,210)"><a href="/wiki/Bryozoa" title="Bryozoa">Bryozoa s.l.</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Entoprocta" title="Entoprocta">Entoprocta or Kamptozoa</a></li> <li><a href="/wiki/Bryozoa" title="Bryozoa"><b>Ectoprocta (moss animals)</b></a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background:rgb(235,235,210)"><a href="/wiki/Brachiozoa" title="Brachiozoa">Brachiozoa</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Brachiopod" title="Brachiopod">Brachiopoda (lamp shells)</a></li> <li><a href="/wiki/Phoronid" title="Phoronid">Phoronida (horseshoe worms)</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr></tbody></table><div></div></td></tr></tbody></table><div></div></td></tr></tbody></table><div></div></td></tr></tbody></table><div></div></td></tr></tbody></table><div></div></td></tr></tbody></table><div></div></td></tr></tbody></table><div></div></td></tr></tbody></table><div></div></td></tr><tr><td class="navbox-abovebelow" colspan="2" style="background:rgb(245,245,232)"><div> <dl><dt><span class="nobold">The <a href="/wiki/Phylogenetic_tree" title="Phylogenetic tree">phylogeny</a> of Bilateria <a href="/wiki/Bilateria#Phylogeny" title="Bilateria">is disputed</a>; see also</span></dt> <dd><a href="/wiki/Nephrozoa" title="Nephrozoa">Nephrozoa</a></dd> <dd><a href="/wiki/Deuterostome" title="Deuterostome">Deuterostomia</a></dd> <dd><a href="/wiki/Xenambulacraria" title="Xenambulacraria">Xenambulacraria</a></dd> <dd><a href="/wiki/Centroneuralia" title="Centroneuralia">Centroneuralia</a></dd></dl> </div></td></tr></tbody></table><div></div></td></tr></tbody></table><div></div></td></tr><tr><td colspan="2" class="navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"><hr /></div></td></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Major_groupswithin_phyla" scope="row" class="navbox-group" style="width:1%;background-color: #f0f0f0;">Major groups<br />within phyla</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><b><a href="/wiki/Sponge" title="Sponge">Sponges</a></b> <ul><li><a href="/wiki/Demosponge" title="Demosponge">Demosponges</a></li> <li><a href="/wiki/Hexactinellid" title="Hexactinellid">Glass sponges</a></li> <li><a href="/wiki/Calcareous_sponge" title="Calcareous sponge">Calcareous sponges</a></li></ul></li> <li><b><a href="/wiki/Cnidaria" title="Cnidaria">Cnidarians</a></b> <ul><li><a href="/wiki/Anthozoa" title="Anthozoa">Anthozoans inc. corals</a></li> <li><a href="/wiki/Medusozoa" title="Medusozoa">Medusozoans inc. jellyfish</a></li> <li><a href="/wiki/Myxozoa" title="Myxozoa">Myxozoans</a></li></ul></li> <li><b><a href="/wiki/Chordate" title="Chordate">Chordates</a></b> <ul><li><a href="/wiki/Cephalochordate" class="mw-redirect" title="Cephalochordate">Lancelets</a></li> <li><a href="/wiki/Tunicate" title="Tunicate">Tunicates</a></li> <li><a href="/wiki/Vertebrate" title="Vertebrate">Vertebrates</a></li></ul></li> <li><b><a href="/wiki/Echinoderm" title="Echinoderm">Echinoderms</a></b> <ul><li><a href="/wiki/Crinozoa" title="Crinozoa">Sea lilies</a></li> <li><a href="/wiki/Asterozoa" title="Asterozoa">Asterozoans inc. starfish</a></li> <li><a href="/wiki/Echinozoa" title="Echinozoa">Echinozoans inc. sea urchins</a></li></ul></li> <li><b><a href="/wiki/Hemichordate" title="Hemichordate">Hemichordates</a></b> <ul><li><a href="/wiki/Acorn_worm" title="Acorn worm">Acorn worms</a></li> <li><a href="/wiki/Pterobranchia" title="Pterobranchia">Pterobranchs</a></li></ul></li> <li><b><a href="/wiki/Nematode" title="Nematode">Nematodes</a></b> <ul><li><a href="/wiki/Chromadorea" title="Chromadorea">Chromadorea</a></li> <li><a href="/wiki/Enoplea" title="Enoplea">Enoplea</a></li> <li><a href="/wiki/Secernentea" title="Secernentea">Secernentea</a></li></ul></li> <li><b><a href="/wiki/Arthropod" title="Arthropod">Arthropods</a></b> <ul><li><a href="/wiki/Chelicerata" title="Chelicerata">Chelicerates inc. arachnids</a></li> <li><a href="/wiki/Myriapoda" title="Myriapoda">Myriapods</a></li> <li><a href="/wiki/Crustacean" title="Crustacean">Crustaceans</a></li> <li><a href="/wiki/Hexapoda" title="Hexapoda">Hexapods inc. insects</a></li></ul></li> <li><b><a href="/wiki/Flatworm" title="Flatworm">Platyhelminths</a></b> <ul><li><a href="/wiki/Turbellaria" title="Turbellaria">Turbellaria</a></li> <li><a href="/wiki/Trematoda" title="Trematoda">Trematoda</a></li> <li><a href="/wiki/Monogenea" title="Monogenea">Monogenea</a></li> <li><a href="/wiki/Cestoda" title="Cestoda">Cestoda</a></li></ul></li> <li><b><a href="/wiki/Bryozoa" title="Bryozoa">Ectoproctans</a></b> <ul><li><a href="/wiki/Phylactolaemata" title="Phylactolaemata">Phylactolaemata</a></li> <li><a href="/wiki/Stenolaemata" title="Stenolaemata">Stenolaemata</a></li> <li><a href="/wiki/Gymnolaemata" title="Gymnolaemata">Gymnolaemata</a></li></ul></li> <li><b><a href="/wiki/Annelid" title="Annelid">Annelids</a></b> <ul><li><a href="/wiki/Polychaete" title="Polychaete">Polychaetes</a></li> <li><a href="/wiki/Clitellata" title="Clitellata">Clitellata</a></li> <li><a href="/wiki/Sipuncula" title="Sipuncula">Sipuncula</a></li></ul></li> <li><b><a href="/wiki/Mollusca" title="Mollusca">Molluscs</a></b> <ul><li><a href="/wiki/Gastropoda" title="Gastropoda">Gastropods</a></li> <li><a href="/wiki/Cephalopod" title="Cephalopod">Cephalopods</a></li> <li><a href="/wiki/Bivalvia" title="Bivalvia">Bivalves</a></li> <li><a href="/wiki/Chiton" title="Chiton">Chitons</a></li> <li><a href="/wiki/Tusk_shell" title="Tusk shell">Tusk shells</a></li></ul></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><td class="navbox-abovebelow" colspan="2" style="background:rgb(235,235,210)"><div> <dl><dd>Phyla with ≥1000 extant species <b>bolded</b></dd> <dd>Potentially <a href="/wiki/Dubious_species" class="mw-redirect" title="Dubious species">dubious phyla</a> †</dd></dl> </div></td></tr></tbody></table></div> <div class="navbox-styles"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236075235"></div><div role="navigation" class="navbox" aria-labelledby="Taxon_identifiers" style="padding:3px"><table class="nowraplinks hlist navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><div id="Taxon_identifiers" style="font-size:114%;margin:0 4em"><a href="/wiki/Help:Taxon_identifiers" title="Help:Taxon identifiers">Taxon identifiers</a></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%;text-align: left;"><i>Ambulacraria</i></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><span style="white-space:nowrap;"><a href="/wiki/Wikidata" title="Wikidata">Wikidata</a>: <span class="uid"><span class="external"><a href="https://www.wikidata.org/wiki/Q136956" class="extiw" title="wikidata:Q136956">Q136956</a></span></span></span></li> <li><span style="white-space:nowrap;"><a href="/wiki/Paleobiology_Database" title="Paleobiology Database">Paleobiology Database</a>: <span class="uid"><a rel="nofollow" class="external text" href="https://paleobiodb.org/classic/basicTaxonInfo?taxon_no=272400">272400</a></span></span></li></ul> </div></td></tr></tbody></table></div>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Retrieved from "<a dir="ltr" href="https://en.wikipedia.org/w/index.php?title=Ambulacraria&oldid=1241201162">https://en.wikipedia.org/w/index.php?title=Ambulacraria&oldid=1241201162</a>"</div></div> <div id="catlinks" class="catlinks" data-mw="interface"><div id="mw-normal-catlinks" class="mw-normal-catlinks"><a href="/wiki/Help:Category" title="Help:Category">Categories</a>: <ul><li><a href="/wiki/Category:Ambulacrarians" title="Category:Ambulacrarians">Ambulacrarians</a></li><li><a href="/wiki/Category:Ediacaran_first_appearances" title="Category:Ediacaran first appearances">Ediacaran first appearances</a></li><li><a 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