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class="firstHeading mw-first-heading"><span class="mw-page-title-main">Notum</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Go to an article in another language. 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href="https://de.wikipedia.org/wiki/Notum" title="Notum – German" lang="de" hreflang="de" data-title="Notum" 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/Notum" title="Notum – Spanish" lang="es" hreflang="es" data-title="Notum" data-language-autonym="Español" data-language-local-name="Spanish" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/Noto_(insectos)" title="Noto (insectos) – Galician" lang="gl" hreflang="gl" data-title="Noto (insectos)" data-language-autonym="Galego" data-language-local-name="Galician" class="interlanguage-link-target"><span>Galego</span></a></li><li class="interlanguage-link interwiki-nds mw-list-item"><a href="https://nds.wikipedia.org/wiki/Notum" title="Notum – Low German" lang="nds" hreflang="nds" data-title="Notum" data-language-autonym="Plattdüütsch" data-language-local-name="Low German" class="interlanguage-link-target"><span>Plattdüütsch</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Noto_(insetos)" title="Noto (insetos) – Portuguese" lang="pt" hreflang="pt" data-title="Noto (insetos)" 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%9D%D0%BE%D1%82%D1%83%D0%BC" title="Нотум – Russian" lang="ru" hreflang="ru" data-title="Нотум" 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/%D0%9D%D0%BE%D1%82%D1%83%D0%BC" title="Нотум – Ukrainian" lang="uk" hreflang="uk" data-title="Нотум" data-language-autonym="Українська" data-language-local-name="Ukrainian" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/Notum_(c%C3%B4n_tr%C3%B9ng)" title="Notum (côn trùng) – Vietnamese" lang="vi" hreflang="vi" data-title="Notum (côn trùng)" data-language-autonym="Tiếng Việt" data-language-local-name="Vietnamese" class="interlanguage-link-target"><span>Tiếng Việt</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/Q2002615#sitelinks-wikipedia" title="Edit interlanguage links" class="wbc-editpage">Edit links</a></span></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> <div class="vector-page-toolbar-container"> <div id="left-navigation"> <nav aria-label="Namespaces"> <div 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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">Anatomic term in insect and nudibranch anatomy</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">For the Notum protein, see <a href="/wiki/NOTUM_(gene)" title="NOTUM (gene)">NOTUM (gene)</a>.</div> <p>The <b>notum</b> (plural <b>nota</b>) is the <a href="/wiki/Dorsum_(biology)" class="mw-redirect" title="Dorsum (biology)">dorsal</a> portion of an <a href="/wiki/Insect" title="Insect">insect</a>'s <a href="/wiki/Thorax" title="Thorax">thoracic</a> segment, or the dorsal surface of the body of <a href="/wiki/Nudibranch" title="Nudibranch">nudibranch</a> gastropods. The word "notum" is always applied to dorsal structures; in other words structures that are part of the back of an animal, as opposed to being part of the animal's ventral surface, or underside. </p><p>This word is used in <a href="/wiki/Entomology" title="Entomology">entomology</a>, the study of insects, and in <a href="/wiki/Malacology" title="Malacology">malacology</a>, the study of mollusks. In malacology the word is used to describe the back of the body of the <a href="/wiki/Taxonomy_(biology)" title="Taxonomy (biology)">taxonomic</a> group of marine, shell-less gastropods that are known as <a href="/wiki/Nudibranchs" class="mw-redirect" title="Nudibranchs">nudibranchs</a>. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="In_insects">In insects</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Notum&action=edit&section=1" title="Edit section: In insects"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>In <a href="/wiki/Entomology" title="Entomology">entomology</a>, the <b>notum</b> is the <a href="/wiki/Dorsum_(biology)" class="mw-redirect" title="Dorsum (biology)">dorsal</a> portion of an <a href="/wiki/Insect" title="Insect">insect</a>'s <a href="/wiki/Thorax" title="Thorax">thoracic</a> segment. The pterothoracic nota (comprising the meso- and metathoracic segments) have two main divisions—the anterior wing-bearing alinotum and the posterior phragma-bearing postnotum.<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><sup class="noprint Inline-Template" style="white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Citing_sources" title="Wikipedia:Citing sources"><span title="This citation requires a reference to the specific page or range of pages in which the material appears. (March 2025)">page needed</span></a></i>]</sup> The phragma, or endotergite, is a transverse infolding of the intersegmental sclerite, and its main function is to provide a reinforcing basis of attachment for the dorsal longitudinal muscles. Accordingly, phragmata tend to be best developed in actively flying insect species.<sup id="cite_ref-isbn0-412-61390-5_2-0" class="reference"><a href="#cite_note-isbn0-412-61390-5-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup><sup class="noprint Inline-Template" style="white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Citing_sources" title="Wikipedia:Citing sources"><span title="This citation requires a reference to the specific page or range of pages in which the material appears. (March 2025)">page needed</span></a></i>]</sup> </p><p>In most winged insects, the structure of each successive notum is quite variable; in the <a href="/wiki/Neoptera" title="Neoptera">Neoptera</a>, the main flight muscles insert on the notum, so the segment that bears the main pair of wings is typically the one with the most highly developed notum. For example, in <a href="/wiki/Diptera" class="mw-redirect" title="Diptera">Diptera</a>, <a href="/wiki/Hymenoptera" title="Hymenoptera">Hymenoptera</a>, and <a href="/wiki/Lepidoptera" title="Lepidoptera">Lepidoptera</a>, the <a href="/wiki/Mesonotum" class="mw-redirect" title="Mesonotum">mesonotum</a> is the most hypertrophied sclerite, and is commonly called the <b>scutum</b>. However, there are other groups of insects in which, for reasons other than flight, the <a href="/wiki/Pronotum" class="mw-redirect" title="Pronotum">pronotum</a> is hypertrophied, such as in all <a href="/wiki/Beetle" title="Beetle">beetles</a> (<a href="/wiki/Coleoptera" class="mw-redirect" title="Coleoptera">Coleoptera</a>), and most <a href="/wiki/Treehopper" title="Treehopper">treehoppers</a> (family <a href="/wiki/Membracidae" class="mw-redirect" title="Membracidae">Membracidae</a>, order <a href="/wiki/Hemiptera" title="Hemiptera">Hemiptera</a>).<sup class="noprint Inline-Template Template-Fact" style="white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Citation_needed" title="Wikipedia:Citation needed"><span title="This claim needs references to reliable sources. (January 2025)">citation needed</span></a></i>]</sup> </p><p>The notum on the first thoracic segment is called the <a href="/wiki/Pronotum" class="mw-redirect" title="Pronotum">pronotum</a>, that on the second the <a href="/wiki/Mesonotum" class="mw-redirect" title="Mesonotum">mesonotum</a>, and the third <a href="/wiki/Metanotum" class="mw-redirect" title="Metanotum">metanotum</a>. </p> <div class="mw-heading mw-heading2"><h2 id="In_nudibranch_gastropods">In nudibranch gastropods</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Notum&action=edit&section=2" title="Edit section: In nudibranch gastropods"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><a href="/wiki/Nudibranch" title="Nudibranch">Nudibranchs</a> are a large group of <a href="/wiki/Sea_slug" title="Sea slug">sea slugs</a>, shell-less <a href="/wiki/Marine_(ocean)" class="mw-redirect" title="Marine (ocean)">marine</a> <a href="/wiki/Gastropod" class="mw-redirect" title="Gastropod">gastropod</a> <a href="/wiki/Mollusk" class="mw-redirect" title="Mollusk">mollusks</a> in the clade <a href="/wiki/Nudibranchia" class="mw-redirect" title="Nudibranchia">Nudibranchia</a>. The <a href="/wiki/Anatomical_terms_of_location" title="Anatomical terms of location">dorsal</a> surface of the body of nudibranchs is known as the notum.<sup id="cite_ref-Gosliner_1987_3-0" class="reference"><a href="#cite_note-Gosliner_1987-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup><sup class="noprint Inline-Template" style="white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Citing_sources" title="Wikipedia:Citing sources"><span title="This citation requires a reference to the specific page or range of pages in which the material appears. (March 2025)">page needed</span></a></i>]</sup> </p> <div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Notum&action=edit&section=3" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Insect_morphology" title="Insect morphology">Insect morphology</a></li> <li><a href="/wiki/Tergum" title="Tergum">Tergum</a></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=Notum&action=edit&section=4" 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"><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="CITEREFCranstonGullan2014" class="citation book cs1">Cranston, P.S.; Gullan, P.J. (2014). <i>The Insects: An Outline Of Entomology</i> (5th ed.). Chichester: Wiley-Blackwell. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/978-1-118-84615-5" title="Special:BookSources/978-1-118-84615-5"><bdi>978-1-118-84615-5</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=The+Insects%3A+An+Outline+Of+Entomology&rft.place=Chichester&rft.edition=5th&rft.pub=Wiley-Blackwell&rft.date=2014&rft.isbn=978-1-118-84615-5&rft.aulast=Cranston&rft.aufirst=P.S.&rft.au=Gullan%2C+P.J.&rfr_id=info%3Asid%2Fen.wikipedia.org%3ANotum" class="Z3988"></span></span> </li> <li id="cite_note-isbn0-412-61390-5-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-isbn0-412-61390-5_2-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite id="CITEREFRichards,_O._W.Davies,_R.G.1977" class="citation book cs1">Richards, O. W.; Davies, R.G. (1977). <i>Imms' General Textbook of Entomology: Volume 1: Structure, Physiology and Development Volume 2: Classification and Biology</i>. Berlin: Springer. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/0-412-61390-5" title="Special:BookSources/0-412-61390-5"><bdi>0-412-61390-5</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Imms%27+General+Textbook+of+Entomology%3A+Volume+1%3A+Structure%2C+Physiology+and+Development+Volume+2%3A+Classification+and+Biology&rft.place=Berlin&rft.pub=Springer&rft.date=1977&rft.isbn=0-412-61390-5&rft.au=Richards%2C+O.+W.&rft.au=Davies%2C+R.G.&rfr_id=info%3Asid%2Fen.wikipedia.org%3ANotum" class="Z3988"></span></span> </li> <li id="cite_note-Gosliner_1987-3"><span class="mw-cite-backlink"><b><a href="#cite_ref-Gosliner_1987_3-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite id="CITEREFGosliner1987" class="citation book cs1">Gosliner, T.M. (1987). <i>Nudibranchs of Southern Africa</i>. Sea Challengers. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/0-930118-13-8" title="Special:BookSources/0-930118-13-8"><bdi>0-930118-13-8</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Nudibranchs+of+Southern+Africa&rft.pub=Sea+Challengers&rft.date=1987&rft.isbn=0-930118-13-8&rft.aulast=Gosliner&rft.aufirst=T.M.&rfr_id=info%3Asid%2Fen.wikipedia.org%3ANotum" 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 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template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Gastropod_anatomy" title="Template talk:Gastropod anatomy"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Gastropod_anatomy" title="Special:EditPage/Template:Gastropod anatomy"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Gastropod_anatomy116" style="font-size:114%;margin:0 4em"><a href="/wiki/Gastropoda" title="Gastropoda">Gastropod</a> anatomy</div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Gastropod_shell" title="Gastropod shell">Shell</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0;padding: 0.25em 0; line-height: 1.4em;"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Aperture_(mollusc)" title="Aperture (mollusc)">Aperture</a></li> <li><a href="/wiki/Apex_(mollusc)" title="Apex (mollusc)">Apex</a></li> <li><a href="/wiki/Body_whorl" title="Body whorl">Body whorl</a></li> <li><a href="/wiki/Callus_(mollusc)" title="Callus (mollusc)">Callus</a></li> <li><a href="/wiki/Columella_(gastropod)" title="Columella (gastropod)">Columella</a></li> <li><a href="/wiki/Lip_(gastropod)" title="Lip (gastropod)">Lip</a></li> <li><a href="/wiki/Lira_(mollusc)" title="Lira (mollusc)">Lira</a></li> <li><a href="/wiki/Nacre" title="Nacre">Nacre</a></li> <li><a href="/wiki/Periostracum" title="Periostracum">Periostracum</a></li> <li><a href="/wiki/Peristome" title="Peristome">Peristome</a></li> <li><a href="/wiki/Planispiral" title="Planispiral">Planispiral</a></li> <li><a href="/wiki/Plait_(gastropod)" title="Plait (gastropod)">Plait</a></li> <li><a href="/wiki/Protoconch" title="Protoconch">Protoconch</a></li> <li><a href="/wiki/Sculpture_(mollusc)" title="Sculpture (mollusc)">Sculpture</a></li> <li><a href="/wiki/Selenizone" title="Selenizone">Selenizone</a></li> <li><a href="/wiki/Siphonal_canal" title="Siphonal canal">Siphonal canal</a></li> <li><a href="/wiki/Siphonal_notch" title="Siphonal notch">Siphonal notch</a></li> <li><a href="/wiki/Spire_(mollusc)" title="Spire (mollusc)">Spire</a></li> <li><a href="/wiki/Stromboid_notch" title="Stromboid notch">Stromboid notch</a></li> <li><a href="/wiki/Suture_(anatomy)" title="Suture (anatomy)">Suture</a></li> <li><a href="/wiki/Umbilicus_(mollusc)" title="Umbilicus (mollusc)">Umbilicus</a></li> <li><a href="/wiki/Valve_(mollusc)" title="Valve (mollusc)">Valve</a></li> <li><a href="/wiki/Varix_(mollusc)" title="Varix (mollusc)">Varix</a></li> <li><a href="/wiki/Whorl_(mollusc)" title="Whorl (mollusc)">Whorl</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Other hard parts</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0;padding: 0.25em 0; line-height: 1.4em;"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Clausilium" title="Clausilium">Clausilium</a></li> <li><a href="/wiki/Love_dart" title="Love dart">Love dart</a></li> <li><a href="/wiki/Operculum_(gastropod)" title="Operculum (gastropod)">Operculum</a></li> <li><a href="/wiki/Pearl" title="Pearl">Pearl</a></li> <li><a href="/wiki/Radula" title="Radula">Radula</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">External soft parts</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0;padding: 0.25em 0; line-height: 1.4em;"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Caryophyllidia" title="Caryophyllidia">Caryophyllidia</a></li> <li><a href="/wiki/Caudal_mucous_pit" title="Caudal mucous pit">Caudal mucous pit</a></li> <li><a href="/wiki/Cerata" title="Cerata">Cerata</a></li> <li><a href="/wiki/Cnidosac" title="Cnidosac">Cnidosac</a></li> <li><a href="/wiki/Mantle_(mollusc)" title="Mantle (mollusc)">Mantle</a></li> <li><a href="/wiki/Mentum" title="Mentum">Mentum</a></li> <li><a class="mw-selflink selflink">Notum</a></li> <li><a href="/wiki/Parapodium" title="Parapodium">Parapodium</a></li> <li><a href="/wiki/Pneumostome" title="Pneumostome">Pneumostome</a></li> <li><a href="/wiki/Rhinophore" title="Rhinophore">Rhinophore</a></li> <li><a href="/wiki/Semper%27s_organ" title="Semper's organ">Semper's organ</a></li> <li><a href="/wiki/Siphon_(mollusc)" title="Siphon (mollusc)">Siphon</a></li> <li><a href="/wiki/Suprapedal_gland" title="Suprapedal gland">Suprapedal gland</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Internal soft parts</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0;padding: 0.25em 0; line-height: 1.4em;"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Circulatory_system_of_gastropods" title="Circulatory system of gastropods">Circulatory system of gastropods</a></li> <li><a href="/wiki/Crop_(anatomy)" title="Crop (anatomy)">Crop</a></li> <li><a href="/wiki/Ctenidium_(mollusc)" title="Ctenidium (mollusc)">Ctenidium</a></li> <li><a href="/wiki/Digestive_system_of_gastropods" title="Digestive system of gastropods">Digestive system of gastropods</a></li> <li><a href="/wiki/Diverticulum_(mollusc)" class="mw-redirect" title="Diverticulum (mollusc)">Diverticula</a></li> <li><a href="/wiki/Excretory_system_of_gastropods" title="Excretory system of gastropods">Excretory system of gastropods</a></li> <li><a href="/wiki/Gastric_shield" title="Gastric shield">Gastric shield</a></li> <li><a href="/wiki/Hancock%27s_organ" title="Hancock's organ">Hancock's organ</a></li> <li><a href="/wiki/Hepatopancreas" title="Hepatopancreas">Hepatopancreas</a></li> <li><a href="/wiki/Hypobranchial_gland" title="Hypobranchial gland">Hypobranchial gland</a></li> <li><a href="/wiki/Nephridium" title="Nephridium">Nephridium</a></li> <li><a href="/wiki/Nervous_system_of_gastropods" title="Nervous system of gastropods">Nervous system of gastropods</a></li> <li><a href="/wiki/Nidamental_gland" title="Nidamental gland">Nidamental gland</a></li> <li><a href="/wiki/Odontophore" title="Odontophore">Odontophore</a></li> <li><a href="/wiki/Oesophageal_pouch" title="Oesophageal pouch">Oesophageal pouch</a></li> <li><a href="/wiki/Osphradium" title="Osphradium">Osphradium</a></li> <li><a href="/wiki/Reproductive_system_of_gastropods" title="Reproductive system of gastropods">Reproductive system of gastropods</a></li> <li><a href="/wiki/Respiratory_system_of_gastropods" title="Respiratory system of gastropods">Respiratory system of gastropods</a></li> <li><a href="/wiki/Sensory_organs_of_gastropods" title="Sensory organs of gastropods">Sensory organs of gastropods</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Other</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0;padding: 0.25em 0; line-height: 1.4em;"><div style="padding:0 0.25em"> 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