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Heteoteuthis nordopacifica Kubodera, T. and T. Okutani 2011

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Containing group: Heteroteuthis

Introduction


Figure. Oral view of the arm crown
of H. nordopacifica. Note the small size
of the webs (small arrows). Drawing
modified from Kubodera and Okutani (1911).

 

H. nordopacifica is based on a single specimen, a mature female, taken in a bottom trawl at 1000m off northeastern Honshu, Japan. This is a typical Heteroteuthis species.

Characteristics

H. nordopacifica differs from females of typical Heteroteuthis species (i.e., H. dispar, H. dagamensis and H. hawaiiensis) in just a few features:

  1. Presence of 2 series of suckers rather than 3-4 series of small suckers at the tips of arms IV. Arms I with 14-15 suckers; arms II with 18-20 suckers; arms III "similar to arms II in number of suckers;" arms IV with 18-20 suckers.
  2. Very low webs between arms I, I and II, II and III.
  3. Apparent absence of the tentacle organ (see "Characteristics" on Heteroteuthinae page).
  4. Possible differences in the shape of the large visceral photophore.

Comments.

Confirmation of these characters on additional specimens in needed as characters 2 and 4 could be affected by muscular contraction and the tentacle organ could be overlooked as its absence was not stated. Character 1, however, is diagnostic for this species.

Distribution

Type locality: Northwest Pacific off Honshu, Japan at 36°50.28´N, 141°44.49'E.

References

Kubodera, T. and T. Okutani. 2011. New additions of luminous bobtail squids to the Japanese cephalopod fauna (Sepiolida: Sepiolidae: Heteroteuthinae). Venus, 69 (3-4): 145-161.

Title Illustrations
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Click on an image to view larger version & data in a new window
Scientific Name Heteoteuthis nordopacifica
Location trawl, off the Pacific coast of northeastern Honshu at 36°50.28īN, 141°44.49'E, 1000 m depth.
Reference Kubodera, T. and T. Okutani. 2011. New additions of luminous bobtail squids to the Japanese cephalopod fauna (Sepiolida: Sepiolidae: Heteroteuthinae). Venus, 69 (3-4): 145-161.
Specimen Condition Preserved
Identified By T. Kubodera
Sex Female
Life Cycle Stage Mature
View Dorsal, Ventral
Size 21 mm ML
Collection the National Museum of Nature and Science, Tokyo
Type Holotype
Copyright ©
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Citing this page:

Tree of Life Web Project. 2014. Heteoteuthis nordopacifica Kubodera, T. and T. Okutani 2011. Version 21 January 2014 (under construction). http://tolweb.org/Heteoteuthis_nordopacifica/149600/2014.01.21 in The Tree of Life Web Project, http://tolweb.org/

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