Under Construction

Todarodes pacificus (Steenstrup, 1880)

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: Todarodes

Introduction

Todarodes pacificus is one of the most abundant of the commercially valuable squid in the world and occupies waters of the eastern North Atlantic. Commonly reaches 300 mm ML off Japan (Roper, et al., 2010).

Characteristics


  1. Arms
    1. Right arm IV hectocotylized. Distal third modified (see drawing).
      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 the distal end of the hectocotylized right arm IV of T. pacificus. Drawing from Dunning (1998, redrawn from Sasaki, 1929: 255 mm ML).

    2. Largrest arm suckers with 9-11 pointed teeth on distal 2/3 of ring.
    3. 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. Arm suckers from male T. pacificus. Drawings from Sasaki (1929).

  2. Tentacles
    1. Club small, narrow.
    2. Largest club suckers with 16-20 subequal teeth on rings.
    3. Carpus with 8-11 small, nearly uniform suckers in oblique rows with: 1, 3, 4; 2,3, 4; 3, 4, 4 or 1, 2, 3, 4 suckers.
    4. Manus with about 40 suckers in 4 series, two medial sucker series about 3 times diameter of marginal suckers.
    5. Dactylus with about 70 suckers in 4 series.
      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 the tentacular club of T. pacificus, 255 mm ML, showing the alignment of suckers in the carpal region. Drawing from Sasaki (1929).

       

      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 views of tentacular club suckers of T. pacificus. Drawing from Sasaki (1929).

Distribution

Type locality: off Hakodate, Japan.  Occurs primarily in the far eastern North Pacific including the Sea of Okhotsk, Sea of Japan and the East China Sea. A map of its distribution can be found here.

References

Dunning, M. C. 1998. Ommastrephidae. In: Carpenter, K. E., Niem, V. H. (eds.). FAO species identification guide for fishery purposes. The living marine resources of the Western Central Pacific. Vol. 2. Cephalopods, crustaceans, holothurians and sharks. FAO, Rome. p. 687-1396.

Roper, C.F.E., Nigmatullin C. & and Jereb P. 2010. Family Ommastrephidae. In P. Jereb & C.F.E. Roper, eds. Cephalopods of the world. An annotated and illustrated catalogue of species known to date. Volume 2. Myopsid and Oegopsid Squids. FAO Species Catalogue for Fishery Purposes. No. 4, Vol. 2. Rome, FAO. pp. 269347.

Sasaki, M. 1929. A Monograph of the Dibranchiate Cephalopods of the Japanese and Adjacent Waters. Journal of the College of Agriculture, Hokkaido Imperial University, 20(supplement):357 pages.

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 Todarodes pacificus
Reference Roper, C.F.E., Nigmatullin C. & and Jereb P. 2010. Family Ommastrephidae. In P. Jereb & C.F.E. Roper, eds. Cephalopods of the world. An annotated and illustrated catalogue of species known to date. Volume 2. Myopsid and Oegopsid Squids. FAO Species Catalogue for Fishery Purposes. No. 4, Vol. 2. Rome, FAO. pp. 269347.
Copyright © FAO
About This Page


University of Hawaii, Honolulu, HI, USA

Correspondence regarding this page should be directed to Richard E. Young at

Page: Tree of Life Todarodes pacificus (Steenstrup, 1880). Authored by Richard E. Young. The TEXT of this page is licensed under the Creative Commons Attribution-NonCommercial 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:

Young, Richard E. 2012. Todarodes pacificus (Steenstrup, 1880). Version 10 November 2012 (under construction). http://tolweb.org/Todarodes_pacificus/77454/2012.11.10 in The Tree of Life Web Project, http://tolweb.org/

edit this page
close box

This page is a Tree of Life Branch Page.

Each ToL branch page provides a synopsis of the characteristics of a group of organisms representing a branch of the Tree of Life. The major distinction between a branch and a leaf of the Tree of Life is that each branch can be further subdivided into descendent branches, that is, 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

Todarodes pacificus

Page Content

articles & notes

collections

people

Explore Other Groups

random page

  go to the Tree of Life home page
top