Stefan F. Wirth<p>The <a href="https://biologists.social/tags/terrestrial" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>terrestrial</span></a> <a href="https://biologists.social/tags/pulmonate" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>pulmonate</span></a> <a href="https://biologists.social/tags/gastropods" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>gastropods</span></a> (<a href="https://biologists.social/tags/Stylommatophora" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Stylommatophora</span></a>, Gastropoda) have two pairs of <a href="https://biologists.social/tags/retractile" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>retractile</span></a> <a href="https://biologists.social/tags/tentacles" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>tentacles</span></a>, an <a href="https://biologists.social/tags/apomorphy" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>apomorphy</span></a> (<a href="https://biologists.social/tags/evolutionary" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>evolutionary</span></a> innovation of the stem species) of the higher taxon Euthyneura. The rear pair of tentacles is elongated and has <a href="https://biologists.social/tags/eyes" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>eyes</span></a> at its tips.<br>My photos show them in a close <a href="https://biologists.social/tags/macro" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>macro</span></a> shot using the Mediterranean <a href="https://biologists.social/tags/snail" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>snail</span></a> <a href="https://biologists.social/tags/species" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>species</span></a> <a href="https://biologists.social/tags/Cornu" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Cornu</span></a> <a href="https://biologists.social/tags/aspersum" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>aspersum</span></a> (<a href="https://biologists.social/tags/Helicidae" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Helicidae</span></a>). <br><a href="https://biologists.social/tags/biodiversity" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>biodiversity</span></a> <a href="https://biologists.social/tags/evolution" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>evolution</span></a><br>© <a href="https://biologists.social/tags/StefanFWirth" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>StefanFWirth</span></a> Berlin 2024</p><p>Photos<br>C. aspersum, 2020, New edit 2024 © S. F. Wirth</p>