Note

Magnoteuthis type beta: Description continued

Richard E. Young and Michael Vecchione
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 Mg. "type beta", preserved. Photograph by R. Young.

  1. Arms
    1. Arms short. Arms II ca. 50% ML; arms III 30% ML.
    2. Largest arm suckers ....
    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 right arm II suckers of Mg. "type beta". The largest suckers are well out on the arm. The tip of the left arm II points toward the camera immediately below the right arm II and shows how rapidly the suckers size drops near the arm tip. Photograph by R. Young.

  2. Tentacles
    1. Base of club appears only slightly attenuated proximally but tentacle strongly abraided.
    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. Tentacular club of Mg. "type beta", preserved, blue color from methylene blue stain. Top - Oral view of the base of the club. The club is abraided so  boundaries may not be accurate. Bottom - Tracing over the club to aid in visualizing the club-base boundaries. Photograph and drawing by R. Young.

  3. Fins
    1. Fin length nearly equals fin width.

  4. Tail
    1. Tail broken off.

  5. Tubercules
    1. No tubercules found.


  6. Pigmentation
    1. Pigmentation apparently absent except for possibly epithelial pigmentation aroung the eyelids, funnel orifice and arms (see title photograph on first page).
    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. Dorsal and ventral views of Mg. "type beta". Photographs by R. Young.

  7. Measurements
    Specimen NMNH No. 817315 Measure as % ML 
    Sex Immature female  
    Mantle length 71 without tail  100
    Tail length missing  
    Mantle width 20  28
    Fin length 49  69
    Fin width 53  75
    Head width 22  31
    Head length 17*  24
    Eye diameter 16** 23 
    Arm I, length, L/R
    25 / 23  35/32
    Arm II, length 33 / 35  46/49
    Arm III, length 20 / 22  28/31
    Arm IV, length 61 / -  86
    Tentacle length 98 
     138
    Club length 70  99
    Measurements in mm.
    *Measured laterally from olfactory organ to tentacle.
    **Calculated from lens diameter (= 6 mm).
About This Page


University of Hawaii, Honolulu, HI, USA


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

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

Page: Tree of Life Magnoteuthis type beta: Description continued Authored by Richard E. Young and Michael Vecchione. 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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