Under Construction

Filippovia Bolstad, 2010

Filippovia knipovitchi (Filippova, 1972)

K.S.R. Bolstad, Michael Vecchione, and Richard E. Young
Click on an image to view larger version & data in a new window
Click on an image to view larger version & data in a new window
Containing group: Onychoteuthidae

Introduction

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

Diagnosis

An onychoteuthid ...

Characteristics

  1. Tentacles
    1. Club with 10-15 (Kubodera et al., 1998) or 13 (Filippova, 1972) pairs of hooks.
    2. Long, slender hooks of ventral series have asymmetrical bases (see drawing below).
      Click on an image to view larger version & data in a new window
      Click on an image to view larger version & data in a new window

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

      Click on an image to view larger version & data in a new window
      Click on an image to view larger version & data in a new window

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

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

  2. Head
    1. Beaks: Descriptions can be found here: Lower beak; upper beak.

  3. Mantle
    1. Skin smooth (i.e., no welts or ridges) (photograph of anterolateral mantle skin at right).
      Click on an image to view larger version & data in a new window
      Click on an image to view larger version & data in a new window

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

  4. Fins
    1. Rhomboidal shape, not drawn out into a tail.
    2. Length 50-60% of ML.
    3. Width ~70% of ML.
      Click on an image to view larger version & data in a new window
      Click on an image to view larger version & data in a new window

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

  5. 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.
      Click on an image to view larger version & data in a new window
      Click on an image to view larger version & data in a new window

      Figure. Ventral view of gladius F. 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 next page) and the rhomboidal fins characterize this species.

Additional features of the description are found here.

Nomenclature

F. knipovitchi was originally attributed to the genus Moroteuthis (= Onykia) due to its lack of photophores and secondary occipital folds, the proportions of the gladius, and the rounded funnel groove. However, it also possesses other character states more closely allied with the genera Onychoteuthis, Ancistroteuthis and Notonykia (smooth mantle epidermis, large fins, asymmetrical ventral tentacular hook bases, unicuspid rachidian tooth).  These morphological characters, combined with two recent molecular studies (Bonnaud et al., 1998; Wakabayashi et al., 2007) placing F. knipovitchi outside the genus Onykia, caused Bolstad (2010) to separate 'M.' knipovitchi from the true Onykia species, and place it into the new genus Filippovia.

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.

Other Names for Filippovia knipovitchi (Filippova, 1972)

References

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

Bonnaud, L., P. G. Rodhouse and R. Boucher-Rodoni. 1998. A phylogenetic study of the squid family Onychoteuthidae (Cephalopoda: Oegopsida). Proc. R. Soc. Lond. B 265:1761-1770.

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.

Wakabayashi, T., Kubodera, T., Sakai, M., Ichii, T. & Chow, S. 2007. Molecular evidence for synonymy in the genera Moroteuthis and Onykia and identification of their paralarvae from northern Hawaiian waters. Journal of the Marine Biological Association of the United Kingdom, 87: 959965.

Title Illustrations
Click on an image to view larger version & data in a new window
Click on an image to view larger version & data in a new window
Scientific Name Filippovia 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


EOS Research Institute, Auckland University of Technology, New Zealand


National Museum of Natural History, Washington, D. C. , USA


University of Hawaii, Honolulu, HI, USA

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

Page: Tree of Life Filippovia Bolstad, 2010. Filippovia knipovitchi (Filippova, 1972). Authored by K.S.R. Bolstad, Michael Vecchione, and Richard E. Young. 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., Michael Vecchione, and Richard E. Young. 2010. Filippovia Bolstad, 2010. Filippovia knipovitchi (Filippova, 1972). Version 23 December 2010 (under construction). http://tolweb.org/Filippovia_knipovitchi/19973/2010.12.23 in The Tree of Life Web Project, http://tolweb.org/

edit this page
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

Filippovia knipovitchi

Page Content

articles & notes

collections

people

Explore Other Groups

random page

  go to the Tree of Life home page
top