go to the Tree of Life home page
advanced
Under Construction
This is an archived version of a Tree of Life page. For up-to-date information, please refer to the current version of this page.

Onykia knipovitchi (Filippova, 1972)

Michael Vecchione, Richard E. Young, and Kotaro Tsuchiya
Containing group: Onykia

Introduction

O. knipovitchi reaches a size of at least 450 mm ML (Kubodera, et al., 1998) and is found in circumpolar Antarctic waters.

Diagnosis

An Onykia ...

Characteristics

  1. Tentacles
    1. Club with 10-15 (Kubodera et al., 1998) or 13 (Filippova1972) pairs of slender hooks.
    2. Long, slender hooks of ventral series have asymmetrical bases (see drawing below).
       image info  image info

      Figure. Oral view of tentacular club and large club hook of O. knipovitchi. Drawings from Filippova, 1972.

       image info

      Figure. Oral view of tentacular club of O. knipovitchi, 295 mm ML, female. Photograph by R. Young.

      Scanning electron micrographs of the club hooks can be found here.

  2. Mantle
    1. Skin smooth (i,e, no welts or ridges)(photograph of anterolateral mantle skin at right).
       image info

      Figure. Portion of skin on anterodorsal mantle of O. knipovitchi, 295 mm ML, female. Photograph by R. Young.

  3. Fins
    1. Rhomboidal shape, not drawn out into a tail.
    2. Length 50-60% of ML.
    3. Width ca. 70% of ML.
       image info

      Figure. Ventral view of fin of O. knipovitchi with indication of rostrum length, 295 mm ML, female. Photograph by R. Young.

  4. Gladius
    1. Rostrum short, 1/12th of GL (measured from ventral edge of conus); triangular in cross-section (dorsal surface flat, ventral surface pointed).
    2. Keel thickened posteriorly.
       image info

      Figure. Ventral view of gladius O. knipovitchi with cross-sections. Drawings from Filippova, 1972.

Comments

Except where noted, this description is taken from Filippova (1972). The slender, asymmetrical hooks, smooth skin, homodont radula (see mext page) and the rhomboidal fins characterize this species.

Additional features of the description are found here.

Distribution

The type locality is near South Georgia Island. This species is found only in Antarctic waters. A map of its distribution can be found here.

References

Filippova, J. A. 1972. New data on the squids (Cephalopoda: Oegopsida) from the Scotia Sea (Antarctic). Malacologia, 11: 391-406.

Kubodera, T., U. Piatkowski, T. Okutani and M.R. Clarke. 1998. Taxonomy and Zoogeography of the Family Onychoteuthidae (Cephalopoda: Oegopsida). Smithsonian Contributions to Zoology, No. 586: 277-291.

Title Illustrations
Scientific Name Onykia knipovitchi
Location Near Elephant Island, Antarctic waters
View Dorsal
Copyright © Uwe Piatkowski
Scientific Name Onykia knipovitchi
Reference Kubodera, T., U. Piatkowski, T. Okutani and M.R. Clarke. 1998. Taxonomy and Zoogeography of the Family Onychoteuthidae (Cephalopoda: Oegopsida). Smithsonian Contributions to Zoology, No. 586: 277-291.
View Ventral, dorsal
Scientific Name Onykia knipovitchi
Reference Filippova, J. A. 1972. New data on the squids (Cephalopoda: Oegopsida) from the Scotia Sea (Antarctic). Malacologia, 11: 391-406.
View Dorsal
Copyright © J. Filippova
About This Page



National Marine Fisheries Service
Systematics Laboratory
National Museum of Natural History
Washington, D. C. 20560
USA

Richard E. Young

Dept of Oceanography
University of Hawaii
Honolulu, Hawaii 96822
USA



Tokyo University of Fisheries, Konan, Minato, Tokyo

Citing this page:

Vecchione, Michael, Young, Richard E., and Tsuchiya, Kotaro. 2003. Onykia knipovitchi (Filippova, 1972). Version 23 June 2003 (under construction). http://tolweb.org/Onykia_knipovitchi/19973/2003.06.23 in The Tree of Life Web Project, http://tolweb.org/

close box

This page is a Tree of Life Leaf Page.

Each ToL leaf page provides a synopsis of the characteristics of a group of organisms representing a leaf at the tip of the Tree of Life. The major distinction between a leaf and a branch of the Tree of Life is that a leaf cannot generally be further subdivided into subgroups representing distinct genetic lineages.

For a more detailed explanation of the different ToL page types, have a look at the Structure of the Tree of Life page.

close box

Onykia knipovitchi

Page Content

Articles

Notes

Treehouses

Explore Other Groups

random page

top