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This is an archived version of a Tree of Life page.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.

Mastigoteuthis magna Joubin, 1913

Michael Vecchione and Richard E. Young
Containing group: Mastigoteuthidae

Introduction

Joubin 1913 (as redescribed in 1920) based M. magna on a single specimen of 160 mm ML from the Sargasso Sea. It appears now to be one of the more common species of Mastigoteuthis in the North Atlantic (personal observations).


Diagnosis

A mastigoteuthid ...

Characteristics

 image info

Figure. Side view of a club sucker of M. magna, holotype. Drawing from Joubin (1920).

 image info

Figure. Ventral view of the funnel component of the funnel locking-apparatus of M. magna, holotype . Drawing from Joubin (1920).

  1. Arms
    1. Arm suckers with smooth inner rings.
  2. Tentacles
    1. Club length 80% of tentacle length (Joubin, 1920).
    2. Proximally suckers in narrow band that gradually broadens; at mid-club suckers cover 3/4 of tentacle (Joubin, 1920).
    3. Club suckers minute with smooth inner rings (Joubin, 1920).
  3. Funnel
    1. Mantle component of the funnel locking-apparatus a "rectilinear ridge narrow anteriorly and slightly wider posteriorly" (Joubin, 1920).
    2. Funnel component an "auricular-like groove" (Joubin, 1920). This is a flask-shaped groove.
  4. Mantle
    1. Skin tubecules absent from mantle and elsewhere.
  5. Fins (Joubin, 1920)
    1. Fin length (without tail) 66% of ML.
    2. Fin width 79% if ML (without tail); assumming a 20 mm tail the FW becomes 71% of ML
    3. Fin width 120% of fin length (without tail).
  6. Photophores
    1. Photophores absent.
  7. Measurements
    Source Joubin, 1920
    Sex ?
    Mantle length 160
    Mantle width 54
    Head length 42
    Head width 43
    Fin length 105 (without tail)
    Fin width 127
    Arm I, length 80
    Arm II, length 105
    Arm III, length 82
    Arm IV, length 172
    Arm I, sucker no. 135
    Arm II, sucker no. 120+
    Arm III, sucker no. 112
    Arm IV, sucker no. 109
    Tentacle length 480
    Club length 390

Comments

This description is taken from Joubin (1920). This species is very similar to M. inermis but differs in the greater width of the fins and the fewer arm suckers. The differences between these species, however, requires confirmation. The flask-shaped groove in the funnel organ, the tiny club suckers and absence of photophores distinguishes M. magna and M. inermis from all other members of the genus.

Distribution

Type locality: Sargasso Sea of the North Atlantic at 31°45'N, 42°39'W.

References

Joubin, L. 1920. Céphalopodes provenant des Campagnes de la Princesse Alice (1898-1910). 3e Serie. Monaco.

Title Illustrations
Scientific Name Mastigoteuthis magna
Comments Ventral view.
Reference Joubin, L. 1920. C?phalopodes provenant des Campagnes de la Princesse Alice (1898-1910). 3e Serie. Monaco.
Size 160 mm ML
Type Holotype
Scientific Name Mastigoteuthis magna
Comments Ventrolateral view of a squid thought to be M. magna that was taken from a submersible
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

Citing this page:

Vecchione, Michael and Young, Richard E. 2004. Mastigoteuthis magna Joubin, 1913. Version 18 July 2004 (under construction). http://tolweb.org/Mastigoteuthis_magna/19520/2004.07.18 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

Mastigoteuthis magna

Page Content

Articles

Notes

Treehouses

Explore Other Groups

random page

top