Onychoteuthis horstkottei
K.S.R. Bolstad
Introduction
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).
Diagnosis
An Onychoteuthis species...
- with tentacle club length ~24% ML.
- with spikes on the distal ventral hooks.
- with subequal-sized visceral photophores.
- with two separate ventral photophores one each eye.
Characteristics
- Photophores
- Posterior intestinal photophore circular, well defined, subequal in diameter.
- Two ocular photophores present on ventral surface of each eyeball, together spanning ~30% eye circumference.
- Posterior intestinal photophore circular, well defined, subequal in diameter.
- Body indices
- Arm lengths - Arms 1 ~38% ML, II-IV ~53% ML
- Fin length ~ 54% ML
- Fin width ~92% ML
- Club length ~24% ML
- Club hook numbers 20-22
- Largest hooks - Hooks V5 or V6
- Arm lengths - Arms 1 ~38% ML, II-IV ~53% ML
- Tentacle club
- Length ~24% ML, with 20–22 long, robust, strongly recurved hooks.
- Bases of hooks V7 or V8 through distal-most produced into pronounced ventral spike by ML 54 mm.
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©
References
Bolstad, K.S.R. 2010. Systematics of the Onychoteuthidae Gray, 1847 (Cephalopoda: Oegopsida). Zootaxa, 2696: 186 pp.
Title Illustrations
| 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 copyright © 2019 K.S.R. Bolstad
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Onychoteuthis horstkottei .
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- First online 23 December 2010
- Content changed 23 December 2010
Citing this page:
Bolstad, K.S.R. 2010. Onychoteuthis horstkottei . 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/
