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Containing group: Abralia

Introduction

A. heminuchalis is a small sized species, less than 40mm DML, endemic in the tropical Eastern Pacific. It is characterized by its proportionally short, robust mantle and photophore arrangement on the ventral mantle (i.e. large photophores with a space surrounding each organ).

Characteristics

1. Tentacle clubs
   1. Two or three hooks on ventral side.
   2. Two rows of large suckers on dorsal side of manus.
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2. Hectocotylus
   1. Left ventral arm of male hectocotylized.
   2. Hectocotylus with two different sized off-set flaps.
   image info
3. Eye Photophores
   1. Five, complex organs: two large terminal opaque organs and three intermediate silvery organs. Posterior opaque organ distinctly largest of all organs.
4. Integumental Photophores
   1. Ventral mantle and head with scattered arrangement of integumental organs.
   2. Large organs each surrounded by space lacking photophores.

Distribution

Geographical distribution

Distribution is restricted to the tropical East Pacific

References

Burgess, L. A. 1992.

Okutani, T. 1974.