shell of <i>Oxymeris dimidiata</i> (synonym : <i>Acus dimidiata</i>)
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/87547772@N00">Anders Sandberg</a>
CC BY 2.0
originally posted to <b><a href="//commons.wikimedia.org/wiki/Flickr" class="mw-redirect" title="Flickr">Flickr</a></b> as <a rel="nofollow" class="external text" href="https://www.flickr.com/photos/87547772@N00/2767782830">Acus dimidiata</a>