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Available in 25 languages" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-25" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">25 languages</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D9%82%D8%B4%D8%B1%D9%8A%D8%A7%D8%AA_%D8%A3%D8%B5%D9%84%D9%8A%D8%A9" title="قشريات أصلية – Arabic" lang="ar" hreflang="ar" data-title="قشريات أصلية" data-language-autonym="العربية" data-language-local-name="Arabic" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Euc%C3%A0rides" title="Eucàrides – Catalan" lang="ca" hreflang="ca" data-title="Eucàrides" data-language-autonym="Català" data-language-local-name="Catalan" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-ceb mw-list-item"><a href="https://ceb.wikipedia.org/wiki/Amphionidacea" title="Amphionidacea – Cebuano" lang="ceb" hreflang="ceb" data-title="Amphionidacea" data-language-autonym="Cebuano" data-language-local-name="Cebuano" class="interlanguage-link-target"><span>Cebuano</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Eucarida" title="Eucarida – German" lang="de" hreflang="de" data-title="Eucarida" 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/Eucarida" title="Eucarida – Spanish" lang="es" hreflang="es" data-title="Eucarida" 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/Eucarida" title="Eucarida – Basque" lang="eu" hreflang="eu" data-title="Eucarida" 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%87%D9%88%D9%85%DB%8C%DA%AF%D9%88%DB%8C%D8%A7%D9%86" title="هومیگویان – Persian" lang="fa" hreflang="fa" data-title="هومیگویان" 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/Eucarida" title="Eucarida – French" lang="fr" hreflang="fr" data-title="Eucarida" data-language-autonym="Français" data-language-local-name="French" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/Euc%C3%A1ridos" title="Eucáridos – Galician" lang="gl" hreflang="gl" data-title="Eucáridos" data-language-autonym="Galego" data-language-local-name="Galician" class="interlanguage-link-target"><span>Galego</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EC%A7%84%ED%95%98%EC%83%81%EB%AA%A9" title="진하상목 – Korean" lang="ko" hreflang="ko" data-title="진하상목" 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/Eucarida" title="Eucarida – Indonesian" lang="id" hreflang="id" data-title="Eucarida" 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-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Eucarida" title="Eucarida – Italian" lang="it" hreflang="it" data-title="Eucarida" data-language-autonym="Italiano" data-language-local-name="Italian" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-lv mw-list-item"><a href="https://lv.wikipedia.org/wiki/Eikar%C4%ABdi" title="Eikarīdi – Latvian" lang="lv" hreflang="lv" data-title="Eikarīdi" data-language-autonym="Latviešu" data-language-local-name="Latvian" class="interlanguage-link-target"><span>Latviešu</span></a></li><li class="interlanguage-link interwiki-arz mw-list-item"><a href="https://arz.wikipedia.org/wiki/%D9%82%D8%B4%D8%B1%D9%8A%D8%A7%D8%AA_%D8%A7%D8%B5%D9%84%D9%8A%D9%87" title="قشريات اصليه – Egyptian Arabic" lang="arz" hreflang="arz" data-title="قشريات اصليه" data-language-autonym="مصرى" data-language-local-name="Egyptian Arabic" class="interlanguage-link-target"><span>مصرى</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Eucarida" title="Eucarida – Dutch" lang="nl" hreflang="nl" data-title="Eucarida" data-language-autonym="Nederlands" data-language-local-name="Dutch" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E3%83%9B%E3%83%B3%E3%82%A8%E3%83%93%E4%B8%8A%E7%9B%AE" title="ホンエビ上目 – Japanese" lang="ja" hreflang="ja" data-title="ホンエビ上目" data-language-autonym="日本語" data-language-local-name="Japanese" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Eucarida" title="Eucarida – Norwegian Bokmål" lang="nb" hreflang="nb" data-title="Eucarida" data-language-autonym="Norsk bokmål" data-language-local-name="Norwegian Bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-uz mw-list-item"><a href="https://uz.wikipedia.org/wiki/Evkaridlar" title="Evkaridlar – Uzbek" lang="uz" hreflang="uz" data-title="Evkaridlar" data-language-autonym="Oʻzbekcha / ўзбекча" data-language-local-name="Uzbek" class="interlanguage-link-target"><span>Oʻzbekcha / ўзбекча</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Raki_w%C5%82a%C5%9Bciwe" title="Raki właściwe – Polish" lang="pl" hreflang="pl" data-title="Raki właściwe" 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/Euc%C3%A1ridos" title="Eucáridos – Portuguese" lang="pt" hreflang="pt" data-title="Eucáridos" data-language-autonym="Português" data-language-local-name="Portuguese" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%AD%D0%B2%D0%BA%D0%B0%D1%80%D0%B8%D0%B4%D1%8B" title="Эвкариды – Russian" lang="ru" hreflang="ru" data-title="Эвкариды" data-language-autonym="Русский" data-language-local-name="Russian" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/Eucarida" title="Eucarida – Serbian" lang="sr" hreflang="sr" data-title="Eucarida" data-language-autonym="Српски / srpski" data-language-local-name="Serbian" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Eucarida" title="Eucarida – Swedish" lang="sv" hreflang="sv" data-title="Eucarida" data-language-autonym="Svenska" data-language-local-name="Swedish" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Eucarida" title="Eucarida – Turkish" lang="tr" hreflang="tr" data-title="Eucarida" data-language-autonym="Türkçe" data-language-local-name="Turkish" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E7%9C%9F%E8%9D%A6%E7%B8%BD%E7%9B%AE" title="真蝦總目 – Chinese" lang="zh" hreflang="zh" data-title="真蝦總目" data-language-autonym="中文" data-language-local-name="Chinese" 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<div class="vector-pinnable-header vector-appearance-pinnable-header vector-pinnable-header-pinned" data-feature-name="appearance-pinned" data-pinnable-element-id="vector-appearance" data-pinned-container-id="vector-appearance-pinned-container" data-unpinned-container-id="vector-appearance-unpinned-container" > <div class="vector-pinnable-header-label">Appearance</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">move to sidebar</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">hide</button> </div> </div> </div> </nav> </div> </div> <div id="bodyContent" class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">From Wikipedia, the free encyclopedia</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><div class="shortdescription nomobile noexcerpt noprint searchaux" style="display:none">Superorder of crustaceans</div> <p class="mw-empty-elt"> </p> <table 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)">Eucarida<br /><div style="font-size: 85%;">Temporal range: <span class="noprint"><span style="display:inline-block;"></span><span style="display:inline-block;">Upper Devonian–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:90.470769230769px; width:129.52923076923px; background-color:#360; opacity:0.42;"></div> <div style="position:absolute; height:8px; left:90.470769230769px; width:129.52923076923px; background-color:#360; opacity:1;"></div> <div style="position:absolute; height:6px; top:1px; left:91.470769230769px; width:127.52923076923px; 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:Meganyctiphanes_norvegica2.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/e/e3/Meganyctiphanes_norvegica2.jpg/220px-Meganyctiphanes_norvegica2.jpg" decoding="async" width="220" height="126" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/e/e3/Meganyctiphanes_norvegica2.jpg/330px-Meganyctiphanes_norvegica2.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/e/e3/Meganyctiphanes_norvegica2.jpg/440px-Meganyctiphanes_norvegica2.jpg 2x" data-file-width="1750" data-file-height="1000" /></a></span> </td></tr> <tr> <td colspan="2" style="text-align: center; font-size: 88%"><i><a href="/wiki/Meganyctiphanes_norvegica" class="mw-redirect" title="Meganyctiphanes norvegica">Meganyctiphanes norvegica</a></i>, northern krill </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/Eucarida" 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>Phylum: </td> <td><a href="/wiki/Arthropod" title="Arthropod">Arthropoda</a> </td></tr> <tr> <td>Class: </td> <td><a href="/wiki/Malacostraca" title="Malacostraca">Malacostraca</a> </td></tr> <tr> <td>Subclass: </td> <td><a href="/wiki/Eumalacostraca" title="Eumalacostraca">Eumalacostraca</a> </td></tr> <tr> <td>Superorder: </td> <td><a class="mw-selflink selflink">Eucarida</a><br /><small><a href="/wiki/William_Thomas_Calman" title="William Thomas Calman">Calman</a>, 1904 <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></small> </td></tr> <tr> <th colspan="2" style="color:inherit; text-align: center; background-color: rgb(235,235,210)">Orders </th></tr> <tr> <td colspan="2" style="text-align: left"> <ul><li><a href="/wiki/Decapoda" class="mw-redirect" title="Decapoda">Decapoda</a></li> <li><a href="/wiki/Euphausiacea" class="mw-redirect" title="Euphausiacea">Euphausiacea</a></li> <li><a href="/wiki/Amphionidacea" class="mw-redirect" title="Amphionidacea">Amphionidacea</a></li> <li>†<a href="/wiki/Angustidontida" class="mw-redirect" title="Angustidontida">Angustidontida</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>Eucarida</b> is a <a href="/wiki/Superorder" class="mw-redirect" title="Superorder">superorder</a> of the <a href="/wiki/Malacostraca" title="Malacostraca">Malacostraca</a>, a class of the <a href="/wiki/Crustacea" class="mw-redirect" title="Crustacea">crustacean</a> subphylum, comprising the <a href="/wiki/Decapoda" class="mw-redirect" title="Decapoda">decapods</a>, <a href="/wiki/Krill" title="Krill">krill</a>, and <a href="/wiki/Angustidontida" class="mw-redirect" title="Angustidontida">Angustidontida</a>.<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> They are characterised by having the <a href="/wiki/Carapace" title="Carapace">carapace</a> fused to all <a href="/wiki/Thorax" title="Thorax">thoracic</a> segments, and by the possession of stalked <a href="/wiki/Crustacean_eye" class="mw-redirect" title="Crustacean eye">eyes</a>.<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Orders">Orders</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Eucarida&action=edit&section=1" title="Edit section: Orders"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Eucarida is a diverse and abundant group, comprising the following three orders: </p> <div class="mw-heading mw-heading3"><h3 id="Euphausiacea">Euphausiacea</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Eucarida&action=edit&section=2" title="Edit section: Euphausiacea"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1236090951">.mw-parser-output .hatnote{font-style:italic}.mw-parser-output div.hatnote{padding-left:1.6em;margin-bottom:0.5em}.mw-parser-output .hatnote i{font-style:normal}.mw-parser-output .hatnote+link+.hatnote{margin-top:-0.5em}@media print{body.ns-0 .mw-parser-output .hatnote{display:none!important}}</style><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="/wiki/Euphausiacea" class="mw-redirect" title="Euphausiacea">Euphausiacea</a></div> <p>The members of the Euphausiacea are commonly called <a href="/wiki/Krill" title="Krill">krill</a> and are all marine shrimp-like species whose <a href="/wiki/Pleopod" class="mw-redirect" title="Pleopod">pleopods</a> (abdominal appendages) function as swimmerets. They swarm and mostly feed on <a href="/wiki/Plankton" title="Plankton">plankton</a>. This group is composed of only 90 species, some of which are the most abundant species on the planet; in fact, it is estimated that the biomass of the <a href="/wiki/Antarctic_krill" title="Antarctic krill">Antarctic krill </a><i>Euphausia superba'</i> is 500 million tons.<sup id="cite_ref-M&D_4-0" class="reference"><a href="#cite_note-M&D-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Decapoda">Decapoda</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Eucarida&action=edit&section=3" title="Edit section: Decapoda"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="/wiki/Decapoda" class="mw-redirect" title="Decapoda">Decapoda</a></div> <p>Decapoda is a group with 15,000 species<sup id="cite_ref-Grave_5-0" class="reference"><a href="#cite_note-Grave-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> which have 5 pairs of thoracopods and a well-developed carapace that covers the <a href="/wiki/Gill" title="Gill">gills</a> (which are exposed in krill). They include <a href="/wiki/Lobster" title="Lobster">lobsters</a>, <a href="/wiki/Crab" title="Crab">crabs</a>, <a href="/wiki/Caridea" title="Caridea">shrimp</a> and <a href="/wiki/Dendrobranchiata" title="Dendrobranchiata">prawns</a>. The decapods are further subdivided on the basis of the gill structure into two suborders <a href="/wiki/Dendrobranchiata" title="Dendrobranchiata">Dendrobranchiata</a> (prawns) and <a href="/wiki/Pleocyemata" title="Pleocyemata">Pleocyemata</a>, which is further subdivided into several infraorders, such as the <a href="/wiki/Caridea" title="Caridea">Caridea</a> (true shrimp), the <a href="/wiki/Stenopodidea" title="Stenopodidea">Stenopodidea</a> (boxer shrimp) and the <a href="/wiki/Anomura" title="Anomura">Anomura</a> and the Brachyura (<a href="/wiki/Crab" title="Crab">crabs</a>) and so forth.<sup id="cite_ref-Schram_6-0" class="reference"><a href="#cite_note-Schram-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-wills98_7-0" class="reference"><a href="#cite_note-wills98-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Angustidontida">Angustidontida</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Eucarida&action=edit&section=4" title="Edit section: Angustidontida"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="/wiki/Angustidontida" class="mw-redirect" title="Angustidontida">Angustidontida</a></div> <p>Lastly, there is an extinct order that contains only one family, <a href="/wiki/Angustidontidae" title="Angustidontidae">Angustidontidae</a>, which in turn contains two genera, <i><a href="/wiki/Angustidontus" title="Angustidontus">Angustidontus</a></i> and <i><a href="/wiki/Schramidontus" title="Schramidontus">Schramidontus</a></i>.<sup id="cite_ref-Gueriau_2014_8-0" class="reference"><a href="#cite_note-Gueriau_2014-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> They were originally considered <a href="/wiki/Eurypterids" class="mw-redirect" title="Eurypterids">eurypterids</a>, but later their possible relationship with decapods was established.<sup id="cite_ref-Gueriau_2014_8-1" class="reference"><a href="#cite_note-Gueriau_2014-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-9" class="reference"><a href="#cite_note-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Phylogeny">Phylogeny</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Eucarida&action=edit&section=5" title="Edit section: Phylogeny"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="/wiki/Phylogeny_of_Malacostraca" title="Phylogeny of Malacostraca">Phylogeny of Malacostraca</a></div> <p>The <a href="/wiki/Phylogeny" class="mw-redirect" title="Phylogeny">phylogeny</a> of the Malacostraca is debated.<sup id="cite_ref-Schram_6-1" class="reference"><a href="#cite_note-Schram-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> In particular, the <a href="/wiki/Monophyly" title="Monophyly">monophyly</a> of Eucarida is also under question: </p> <ul><li><b>Monophyletic</b>: many argue that the Eucarida group is a <a href="/wiki/Clade" title="Clade">clade</a>, sister to the Peracarida clade<sup id="cite_ref-Schram_6-2" class="reference"><a href="#cite_note-Schram-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-10" class="reference"><a href="#cite_note-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup> or to the basal Malacostraca.<sup id="cite_ref-wills98_7-1" class="reference"><a href="#cite_note-wills98-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-Spears,_T._2005_11-0" class="reference"><a href="#cite_note-Spears,_T._2005-11"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup> or to Mysida (paraphyletic Schizopoda)<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></li> <li><b>Paraphyletic</b>: some have proposed a paraphyletic Eucarida forming a clade with a nested Peracarida.<sup id="cite_ref-Richter,_S._2001_13-0" class="reference"><a href="#cite_note-Richter,_S._2001-13"><span class="cite-bracket">[</span>13<span class="cite-bracket">]</span></a></sup></li> <li><b>Polyphyletic</b>: some have grouped Euphausiacea with Mysida to form the <a href="/wiki/Schizopoda" title="Schizopoda">Schizopoda</a>,<sup id="cite_ref-14" class="reference"><a href="#cite_note-14"><span class="cite-bracket">[</span>14<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-Jarman_15-0" class="reference"><a href="#cite_note-Jarman-15"><span class="cite-bracket">[</span>15<span class="cite-bracket">]</span></a></sup> or the Euphausiacea with the Hoplocarida,<sup id="cite_ref-Meland_16-0" class="reference"><a href="#cite_note-Meland-16"><span class="cite-bracket">[</span>16<span class="cite-bracket">]</span></a></sup> with Decapoda basal to the Peracarida.<sup id="cite_ref-Jarman_15-1" class="reference"><a href="#cite_note-Jarman-15"><span class="cite-bracket">[</span>15<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-Meland_16-1" class="reference"><a href="#cite_note-Meland-16"><span class="cite-bracket">[</span>16<span class="cite-bracket">]</span></a></sup></li></ul> <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=Eucarida&action=edit&section=6" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1235681985">.mw-parser-output .side-box{margin:4px 0;box-sizing:border-box;border:1px solid #aaa;font-size:88%;line-height:1.25em;background-color:var(--background-color-interactive-subtle,#f8f9fa);display:flow-root}.mw-parser-output .side-box-abovebelow,.mw-parser-output .side-box-text{padding:0.25em 0.9em}.mw-parser-output .side-box-image{padding:2px 0 2px 0.9em;text-align:center}.mw-parser-output .side-box-imageright{padding:2px 0.9em 2px 0;text-align:center}@media(min-width:500px){.mw-parser-output .side-box-flex{display:flex;align-items:center}.mw-parser-output .side-box-text{flex:1;min-width:0}}@media(min-width:720px){.mw-parser-output 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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 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Willassen (2007). <a rel="nofollow" class="external text" href="http://decapoda.nhm.org/pdfs/31293/31293.pdf">"The disunity of "Mysidacea" (Crustacea)"</a> <span class="cs1-format">(PDF)</span>. <i><a href="/wiki/Molecular_Phylogenetics_and_Evolution" title="Molecular Phylogenetics and Evolution">Molecular Phylogenetics and Evolution</a></i>. <b>44</b> (3): 1083–1104. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1016%2Fj.ympev.2007.02.009">10.1016/j.ympev.2007.02.009</a>. <a href="/wiki/PMID_(identifier)" class="mw-redirect" title="PMID (identifier)">PMID</a> <a rel="nofollow" class="external text" href="https://pubmed.ncbi.nlm.nih.gov/17398121">17398121</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Molecular+Phylogenetics+and+Evolution&rft.atitle=The+disunity+of+%22Mysidacea%22+%28Crustacea%29&rft.volume=44&rft.issue=3&rft.pages=1083-1104&rft.date=2007&rft_id=info%3Adoi%2F10.1016%2Fj.ympev.2007.02.009&rft_id=info%3Apmid%2F17398121&rft.au=K.+Meland&rft.au=E.+Willassen&rft_id=http%3A%2F%2Fdecapoda.nhm.org%2Fpdfs%2F31293%2F31293.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3AEucarida" class="Z3988"></span></span> </li> </ol></div></div> <div class="navbox-styles"><style data-mw-deduplicate="TemplateStyles:r1129693374">.mw-parser-output .hlist dl,.mw-parser-output .hlist ol,.mw-parser-output .hlist ul{margin:0;padding:0}.mw-parser-output .hlist dd,.mw-parser-output .hlist dt,.mw-parser-output .hlist li{margin:0;display:inline}.mw-parser-output .hlist.inline,.mw-parser-output .hlist.inline dl,.mw-parser-output .hlist.inline ol,.mw-parser-output .hlist.inline ul,.mw-parser-output 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template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Malacostraca" title="Template talk:Malacostraca"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Malacostraca" title="Special:EditPage/Template:Malacostraca"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Orders_of_Malacostraca" style="font-size:114%;margin:0 4em">Orders of <a href="/wiki/Malacostraca" title="Malacostraca">Malacostraca</a></div></th></tr><tr><td class="navbox-abovebelow" colspan="2"><div> <ul><li>Kingdom <a href="/wiki/Animal" title="Animal">Animalia</a></li> <li>Phylum: <a href="/wiki/Arthropod" title="Arthropod">Arthropoda</a></li> <li>Subphylum: <a href="/wiki/Crustacean" title="Crustacean">Crustacea</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Phyllocarida" title="Phyllocarida">Phyllocarida</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="/w/index.php?title=Archaeostraca&action=edit&redlink=1" class="new" title="Archaeostraca (page does not exist)">Archaeostraca</a></li> <li>†<a href="/w/index.php?title=Hoplostraca&action=edit&redlink=1" class="new" title="Hoplostraca (page does not exist)">Hoplostraca</a></li> <li><a href="/wiki/Leptostraca" title="Leptostraca">Leptostraca</a></li> <li>†<a href="/wiki/Hymenocaris" title="Hymenocaris">Hymenostraca</a>?</li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Hoplocarida" title="Hoplocarida">Hoplocarida</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/Aeschronectida" title="Aeschronectida">Aeschronectida</a></li> <li>†<a href="/w/index.php?title=Archaeostomatopoda&action=edit&redlink=1" class="new" title="Archaeostomatopoda (page does not exist)">Archaeostomatopoda</a></li> <li><a href="/wiki/Mantis_shrimp" title="Mantis shrimp">Stomatopoda (mantis shrimp)</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Eumalacostraca" title="Eumalacostraca">Eumalacostraca</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%"><a href="/wiki/Syncarida" title="Syncarida">Syncarida</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/Anaspidacea" title="Anaspidacea">Anaspidacea</a></li> <li><a href="/wiki/Bathynellacea" title="Bathynellacea">Bathynellacea</a></li> <li>†<a href="/w/index.php?title=Palaeocaridacea&action=edit&redlink=1" class="new" title="Palaeocaridacea (page does not exist)">Palaeocaridacea</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Peracarida" title="Peracarida">Peracarida</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/Spelaeogriphacea" title="Spelaeogriphacea">Spelaeogriphacea</a></li> <li><a href="/wiki/Thermosbaenacea" title="Thermosbaenacea">Thermosbaenacea</a></li> <li><a href="/wiki/Lophogastrida" title="Lophogastrida">Lophogastrida</a></li> <li><b><a href="/wiki/Mysida" title="Mysida">Mysida</a></b> (opossum shrimp)</li> <li><a href="/wiki/Stygiomysida" title="Stygiomysida">Stygiomysida</a></li> <li><a href="/wiki/Mictacea" title="Mictacea">Mictacea</a></li> <li><a href="/wiki/Bochusacea" class="mw-redirect" title="Bochusacea">Bochusacea</a></li> <li><b><a href="/wiki/Amphipoda" title="Amphipoda">Amphipoda</a></b></li> <li><a href="/w/index.php?title=Ingolfiellida&action=edit&redlink=1" class="new" title="Ingolfiellida (page does not exist)">Ingolfiellida</a></li> <li><b><a href="/wiki/Isopoda" title="Isopoda">Isopoda</a></b></li> <li>†<a href="/wiki/Pygocephalomorpha" title="Pygocephalomorpha">Pygocephalomorpha</a></li> <li><a href="/wiki/Tanaidacea" title="Tanaidacea">Tanaidacea</a></li> <li><a href="/wiki/Cumacea" title="Cumacea">Cumacea (hooded shrimp)</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a class="mw-selflink selflink">Eucarida</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/Angustidontidae" title="Angustidontidae">Angustidontida</a></li> <li><a href="/wiki/Krill" title="Krill">Euphausiacea (krill)</a></li> <li><a href="/wiki/Decapoda" class="mw-redirect" title="Decapoda"><b>Decapoda</b> (shrimp, prawns, crayfish, lobsters, crabs, etc.)</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><td class="navbox-abovebelow" colspan="2"><div> <ul><li><small>The three most speciose orders are marked in <b>bold</b>; obelisks (†) mark extinct orders.</small></li></ul> </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>Eucarida</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/Q127341" class="extiw" title="wikidata:Q127341">Q127341</a></span></span></span></li> <li><span style="white-space:nowrap;"><a href="/wiki/Wikispecies" title="Wikispecies">Wikispecies</a>: <span class="uid"><span class="external"><a href="https://species.wikimedia.org/wiki/Eucarida" class="extiw" title="wikispecies:Eucarida">Eucarida</a></span></span></span></li> <li><span style="white-space:nowrap;"><a href="/wiki/Animal_Diversity_Web" title="Animal Diversity Web">ADW</a>: <span class="uid"><a rel="nofollow" class="external text" href="https://animaldiversity.org/accounts/Eucarida/">Eucarida</a></span></span></li> <li><span style="white-space:nowrap;"><a href="/wiki/Australian_Faunal_Directory" title="Australian Faunal Directory">AFD</a>: <span class="uid"><a rel="nofollow" class="external text" href="https://biodiversity.org.au/afd/taxa/Eucarida">Eucarida</a></span></span></li> <li><span style="white-space:nowrap;"><a href="/wiki/BugGuide" title="BugGuide">BugGuide</a>: <span class="uid"><a rel="nofollow" class="external text" href="https://bugguide.net/node/view/350322">350322</a></span></span></li> <li><span style="white-space:nowrap;"><a href="/wiki/Encyclopedia_of_Life" title="Encyclopedia of Life">EoL</a>: <span class="uid"><a rel="nofollow" class="external text" href="https://eol.org/pages/2601798">2601798</a></span></span></li> <li><span style="white-space:nowrap;"><a href="/wiki/Fauna_Europaea" title="Fauna Europaea">Fauna Europaea</a>: <span class="uid"><a rel="nofollow" class="external text" href="http://www.eu-nomen.eu/portal/taxon.php?GUID=urn:lsid:faunaeur.org:taxname:13299">13299</a></span></span></li> <li><span style="white-space:nowrap;"><a href="/wiki/Fauna_Europaea" title="Fauna Europaea">Fauna Europaea (new)</a>: <span class="uid"><a rel="nofollow" class="external text" href="https://fauna-eu.org/cdm_dataportal/taxon/26987f7d-e6af-4e4e-810e-609f7cefc167">26987f7d-e6af-4e4e-810e-609f7cefc167</a></span></span></li> <li><span style="white-space:nowrap;"><a href="/wiki/INaturalist" title="INaturalist">iNaturalist</a>: <span class="uid"><a rel="nofollow" class="external text" href="https://inaturalist.org/taxa/144113">144113</a></span></span></li> <li><span style="white-space:nowrap;"><a href="/wiki/Integrated_Taxonomic_Information_System" title="Integrated Taxonomic Information System">ITIS</a>: <span class="uid"><a rel="nofollow" class="external text" href="https://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=95495">95495</a></span></span></li> <li><span style="white-space:nowrap;"><a href="/wiki/National_Biodiversity_Network" title="National Biodiversity Network">NBN</a>: <span class="uid"><a rel="nofollow" class="external text" href="https://data.nbn.org.uk/Taxa/NHMSYS0021049527">NHMSYS0021049527</a></span></span></li> <li><span style="white-space:nowrap;"><a href="/wiki/National_Center_for_Biotechnology_Information" title="National Center for Biotechnology Information">NCBI</a>: <span class="uid"><a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&id=6682">6682</a></span></span></li> <li><span style="white-space:nowrap;"><a href="/wiki/Open_Tree_of_Life" title="Open Tree of Life">Open Tree of Life</a>: <span class="uid"><a rel="nofollow" class="external text" href="https://tree.opentreeoflife.org/taxonomy/browse?id=169204">169204</a></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=133226">133226</a></span></span></li> <li><span style="white-space:nowrap;"><a href="/wiki/World_Register_of_Marine_Species" title="World Register of Marine Species">WoRMS</a>: <span class="uid"><a rel="nofollow" class="external text" href="https://www.marinespecies.org/aphia.php?p=taxdetails&id=1089">1089</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=Eucarida&oldid=1259386623">https://en.wikipedia.org/w/index.php?title=Eucarida&oldid=1259386623</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" 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