<p><em><strong>A. heminuchalis</strong></em> is a small sized species, less than 40mm DML, found in the tropical&nbsp; Pacific. It is very similar to <em><strong>A. siedleckyi</strong></em> from off South Africa and may prove to be a junior synonym of the latter. It is characterized by its proportionally short, robust mantle and a photophore arrangement on the ventral head and mantle in which large photophores have a space surrounding each organ.</p><h4>Brief diagnosis:</h4><p>An <em><strong>Abralia (Heterabralia)</strong></em> with ... </p><ul><li>anterior ocular photophore comparable in size to largest of 3 medial ocular photophores but much smaller than posterior ocular photophore.&nbsp;</li><li>irregular photophore series on mid-region of arms IV.<br /></li></ul>