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Mastigoteuthis agassizii: Beak variation

Michael Vecchione and Richard E. Young

Return to Mastigoteuthis agassizii: Description of beaks

Here photographs of the beaks of four additional specimens of M. agassizii from the North Atlantic show some of the variability found in this species.

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Click on an image to view larger version & data in a new window

Figure. Two views of the lower beak of M. agassizii, sex unknown, 118 mm ML, 4.0 mm LRL, central North Atlantic, 50°N, 27°W. Left - Side view. Right - Side-oblique view. Photographs by R. Young.

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Click on an image to view larger version & data in a new window

Figure. Two views of the lower beak of M. agassizii, immature male, 62 mm ML, 3.3 mm LRL, central North Atlantic,  53°N, 36°W. Left - Side view. Right - Side-oblique view. Photographs 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. Side views of the upper beaks from two individuals of M. agassizii. Left - 118 mm ML, central North Atlantic, 50°N, 27°W. Right -  Immature male, 62 mm ML, central North Atlantic,  53°N, 36°W. Photographs 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. Two views of the lower beak of M. agassizii, immature female, 72 mm ML, 2.9 mm LRL, western North Atlantic. Left - Side view. Right - Side-oblique view. Photographs 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. Two views of the lower beak of M. agassizii, immature female, 85 mm ML, 3.1 mm LRL, western North Atlantic, 32°N, 79°W. Left - Side view. Right - Side-oblique view. Photographs 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. Side views of the upper beaks from two individuals of M. agassizii. Left - Immature female, 72 mm ML, western North Atlantic. Right - Immature female, 85 mm ML, western North Atlantic,  32°N, 79°W. Photographs by R. Young.

About This Page


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


University of Hawaii, Honolulu, HI, USA

Page: Tree of Life Mastigoteuthis agassizii: Beak variation 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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