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Onychoteuthis horstkottei Bolstad, 2010

K.S.R. Bolstad
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Containing group: Onychoteuthis


Onychoteuthis horstkottei is the most recently described Onychoteuthis species.  It is distinguished from congeners by having two separate smaller photophores on the ventral surface of the eyeball (where all other Onychoteuthis species have a single elongate photophore).


An Onychoteuthis species...



  1. Photophores
    1. Posterior intestinal photophore circular, well defined, subequal in diameter.
    2. Two ocular photophores present on ventral surface of each eyeball, together spanning ~30% eye circumference.

  2. Body indices
    1. Arm lengths - Arms 1 ~38% ML, II-IV ~53% ML
    2. Fin length ~ 54% ML
    3. Fin width ~92% ML
    4. Club length ~24% ML
    5. Club hook numbers 20-22
    6. Largest hooks - Hooks V5 or V6

  3. Tentacle club
    1. Length ~24% ML, with 20–22 long, robust, strongly recurved hooks.
    2. Bases of hooks V7 or V8 through distal-most produced into pronounced ventral spike by ML 54 mm.

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Eastern equatorial Pacific, depth unknown (most specimens collected at surface).


Bolstad, K.S.R. 2010. Systematics of the Onychoteuthidae Gray, 1847 (Cephalopoda: Oegopsida). Zootaxa, 2696: 186 pp.

Title Illustrations
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Scientific Name Onychoteuthis horstkottei
Specimen Condition Dead Specimen
Sex Female
View Dorsal
Size ML 79 mm
Collection SBMNH
Copyright © K.S.R. Bolstad
About This Page

K.S.R. Bolstad
Auckland University of Technology

Correspondence regarding this page should be directed to K.S.R. Bolstad at

Page: Tree of Life Onychoteuthis horstkottei Bolstad, 2010. Authored by K.S.R. Bolstad. The TEXT of this page is licensed under the Creative Commons Attribution License - Version 3.0. Note that images and other media featured on this page are each governed by their own license, and they may or may not be available for reuse. Click on an image or a media link to access the media data window, which provides the relevant licensing information. For the general terms and conditions of ToL material reuse and redistribution, please see the Tree of Life Copyright Policies.

Citing this page:

Bolstad, K.S.R. 2010. Onychoteuthis horstkottei Bolstad, 2010. Version 23 December 2010 (under construction). http://tolweb.org/Onychoteuthis_horstkottei/145221/2010.12.23 in The Tree of Life Web Project, http://tolweb.org/

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