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Mastigoteuthis magna Joubin, 1913

Michael Vecchione and Richard E. Young
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Containing group: Mastigoteuthis magna group

Introduction

M. magna  appears to be one of the more common species of Mastigoteuthis in the temperate to tropical Atlantic. The description of the holotype by Joubin (1920) can be seen here.

Brief diagnosis:

A member of the M. magna group ...

Characteristics

  1. Arms
    1. Arm suckers with smooth inner rings.
    2. Largest suckers of arms IV larger than those of other arms.
    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. Oral views of large suckers from  arms of M. magna, Left - Dive 3750, immature female, 111 mm ML; light microscope. Right - DE011-003, arm III, sucker 6, 135 mm ML; scanning electron microscope. Photographs by R. Young.

  2. More scanning electron microscopy of arm and club suckers can be seen here.

  3. Head
    1. Beaks. Description of the beaks in 2D can be found here.
      Description of the beaks in 3D can be found here: Lower beak; upper beak..
  4. Funnel
    1. Mantle component of funnel locking-apparatus with straight, anterior groove and broad, posterior cup
    2. 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. Funnel locking-apparatus of M. magna. Left - Frontal view of funnel component, 111 mm ML. Middle - Frontal view of mantle component, 111 mm ML. Right -  Sta. WH512, 32°47'N, 16°24'W, head only. Photographs by R. Young.

  5. Photophores and pigmentation
    1. Skin, except oral surfaces, covered with dense packing of chromatophores containing a deep, brilliant red pigment.
    2. Photophores absent.
    3. No trace of ringed chromatophores or white spheres.
    4. 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
      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
      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. Left - Frontal view of the chromatophores of M. magna, off New England, fresh, showing numerous chromatophores. Region of squid unknown. Photograph by M. Vecchione. Right - Ventrolateral view of a damaged portion of the ventral head of M. magna, 40°N,67°W, 160 mm ML, showing dense packing of chromatophores and the subchromatophore layer (damaged region) but without any indication of photophores. Photograph by R. Young.

Comments

More details of the description of M. magna can be found here.

Distribution

Type locality: Sargasso Sea of the North Atlantic at 31°45'N, 42°39'W. Apparently M. magna occurs throughout the tropical and warm temperate Atlantic, At least from 50°N, 27°W (MARECO record) to 40°S, 26°W (FFS WALTHER HERWIG record). Reported from the Indian Ocean (Nesis, 1982/87) but this could a species of the M. magna-group that was not recognized at the time of this publication.

References

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

Title Illustrations
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Scientific Name Mastigoteuthis magna
Comments Ventrolateral view of a squid thought to be M. magna that was taken from a submersible
Scientific Name Mastigoteuthis magna
Location Off N. E. United States, 40N, 67W
Specimen Condition Preserved
Sex Male
Life Cycle Stage Immature
View Ventral
Size 160 mm ML
Image Use creative commons This media file is licensed under the Creative Commons Attribution-NonCommercial License - Version 3.0.
Copyright ©
About This Page


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


University of Hawaii, Honolulu, HI, USA

Page: Tree of Life Mastigoteuthis magna Joubin, 1913. Authored by Michael Vecchione and 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:

Vecchione, Michael and Richard E. Young. 2010. Mastigoteuthis magna Joubin, 1913. Version 15 August 2010 (under construction). http://tolweb.org/Mastigoteuthis_magna/19520/2010.08.15 in The Tree of Life Web Project, http://tolweb.org/

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