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A. heminuchalis is a small sized species, less than 40mm DML, found in the tropical Pacific. It is very similar to A. siedleckyi 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.
An Abralia (Heterabralia) with ...
- anterior ocular photophore comparable in size to largest of 3 medial ocular photophores but much smaller than posterior ocular photophore.
- irregular photophore series on mid-region of arms IV.