Note

Magnapinna atlantica: Description of paratype

Michael Vecchione and Richard E. Young
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Figure. Dorsal (left) and ventral (right) views of M. atlantica, paratype, immature male, 53 mm ML. A glass slide is placed over the fins to hold them flat. The ridges on the fins is an artifact resulting from shipment of the squid. Photographs by R. Young.

  1. Arms
    1. Arm suckers in two series.
    2. Inner rings of arm suckers with smooth rings.
    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. Side view of a portion of arm IV of M. atlantica, paratype, showing suckers with smooth sucker rings. Photograph by R. Young.

  2. Tentacles
    1. Tentacle bases approximately the same thickness as adjacent arms.
    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. Ventral view of the brachial crown of M. atlantica, paratype showing relative thickness of arms and tentacles. Photograph by R. 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

      FigureM. Oral views of the tentacles of M. atlantica, paratype. Top - Right tentacle. Note that two suckers are present, one at the broken tip and the other midway along the tentacle. Insect pins holding the tentacle in position. Bottom -  Left tentacle.  Note that two suckers are present, a small one near the base of the glandular region and a larger one midway from the first sucker to the broken tip. Tentacles have been stained with methylene blue to enhance the surface structure. Photographs by R. Young.

  3. Head
    1. Beaks are described here.

  4. Funnel
    1. Funnel locking-apparatus oval without tragus or antitragus.
    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. Frontal view of the funnel component of the funnel locking-apparatus of M. atlantica, paratype. Apparatus slightly distorted. Photograph by R. Young.

  5. Viscera
    1. Nuchal cartilage thin.
    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. Dorsolateral view of the nuchal region of M. atlantica, paratype, showing nuchal cartilage (arrow). Photograph by R. 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

      Figure. Ventral view of the mantle cavity of M. atlantica, paratype, showing the viscera. Insert shows an expanded view of the squid for orientation. Photograph by R. Young.

  6. Measurements
    1. ML - 53, FL - 41, FW - ca. 52, Tail Length - 2+, Eye Diameter -
      ca. 4.5, Lens Diameter - 1.7, HW - 7, Arm I length (right) - 9, Arm I length
      (left) - 8.5, Arm II length (right) - ca. 8.5, Arm II length (left) - 10,
      Arm III length (right) - 8.5, Arm III (left) - 9, Arm IV length (right) -
      10, Arm IV length (left) - ca. 10.

References

Vecchione, M. and R. E. Young. 2006. The squid family Magnapinnidae (Mollusca; Cephalopoda) in the North Atlantic with a description of Magnapinna atlantica, n. sp.. Proc. Biol. Soc. Wash. 119 (3): 365-372.

About This Page
We thank Annie Lindgren for locating and borrowing this squid for our examination.


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


University of Hawaii, Honolulu, HI, USA

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

Page: Tree of Life Magnapinna atlantica: Description of paratype 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.

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