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#apomorphies

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Stefan F. Wirth<p><a href="https://biologists.social/tags/colossalsquid" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>colossalsquid</span></a> <a href="https://biologists.social/tags/Mesonychoteuthis" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Mesonychoteuthis</span></a> <a href="https://biologists.social/tags/hamiltoni" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>hamiltoni</span></a> (<a href="https://biologists.social/tags/Oegopsida" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Oegopsida</span></a>) is a <a href="https://biologists.social/tags/deepsea" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>deepsea</span></a> fish predator sized up to 14 m long (<a href="https://biologists.social/tags/abyssalgigantism" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>abyssalgigantism</span></a>). Special features (<a href="https://biologists.social/tags/apomorphies" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>apomorphies</span></a>): <a href="https://biologists.social/tags/hooked" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>hooked</span></a> <a href="https://biologists.social/tags/arms" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>arms</span></a>/tentacles, largest known animal <a href="https://biologists.social/tags/eyes" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>eyes</span></a> (27–30 cm). The first <a href="https://biologists.social/tags/alive" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>alive</span></a> <a href="https://biologists.social/tags/filmed" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>filmed</span></a> evidence in April 2025 (link).</p><p>©<a href="https://biologists.social/tags/StefanFWirth" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>StefanFWirth</span></a> 2025</p><p>Reference</p><p><a href="https://youtu.be/lzPoG9H8Hlo?si=V8eDNUrJJT7RoDlP" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">youtu.be/lzPoG9H8Hlo?si=V8eDNU</span><span class="invisible">rJJT7RoDlP</span></a></p><p>Photos<br>1) illustration Citron/CC-BY-SA-3.0, free documentation license <br>2) specimen in Te Papa Museum, NZ, by Y23, 2009, cre. comm. <a href="https://creativecommons.org/licenses/by-sa/3.0/deed.en" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">creativecommons.org/licenses/b</span><span class="invisible">y-sa/3.0/deed.en</span></a></p>
Stefan F. Wirth<p><a href="https://biologists.social/tags/Histiostomatidae" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Histiostomatidae</span></a> <a href="https://biologists.social/tags/mites" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>mites</span></a> phoretically attach arthropods, having e.g. these <a href="https://biologists.social/tags/apomorphies" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>apomorphies</span></a> (newly evolved features): <a href="https://biologists.social/tags/filtermouth" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>filtermouth</span></a> in free stages and forward-facing <a href="https://biologists.social/tags/legs" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>legs</span></a> 3,4 of <a href="https://biologists.social/tags/deutonymphs" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>deutonymphs</span></a>, supporting <a href="https://biologists.social/tags/attaching" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>attaching</span></a>/#detaching <a href="https://biologists.social/tags/host" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>host</span></a>. <a href="https://biologists.social/tags/Images" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Images</span></a> = my current <a href="https://biologists.social/tags/research" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>research</span></a> </p><p>© <a href="https://biologists.social/tags/StefanFWirth" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>StefanFWirth</span></a> 2025</p><p>Related papers</p><p>S. F. Wirth 2016<br><a href="https://doi.org/10.21684/0132-8077-2016-24-2-97-111" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">doi.org/10.21684/0132-8077-201</span><span class="invisible">6-24-2-97-111</span></a></p><p>S. F. Wirth 2023, &nbsp;pp 102-103<br><a href="https://doi.org/10.4060/cc6728en" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="">doi.org/10.4060/cc6728en</span><span class="invisible"></span></a></p><p><a href="https://biologists.social/tags/Photos" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Photos</span></a><br>1) sideview mouth adult H. sp ex tree stump (2022) 2) deutonymph B. <a href="https://biologists.social/tags/sibirica" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>sibirica</span></a> (2016) © S. F. W.</p>
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