Grimpoteuthis boylei Description Continued

1. Eyes
   1. Moderate size; eye diameter - 33.9% of head width.
      
      
2. Funnel
   1. Funnel organ V-shaped.
      
      
3. Fins
   1. Anterior margin with lobe near attachment.
      
      
4. Gills
   1. Half-orange shape.
   2. 7-8 primary lamellae.
      
      

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      Figure. Ventral view of the mantle cavity of G. boylei, paratype, female, 115 mm ML. Drawing from Collins (2003).

5. Optic lobes and nerves
   1. Optic lobe spherical.
   2. Single optic nerve bundle passes through/by white body.
   
   
   

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   xxFigure. Optic lobe, optic nerve tract, white body and eye of G. boylei, paratype, male, 63 mm ML. Drawing from Collins (2003).

6. Digestive tract
   1. Radula present; poorly developed; homodont.
   2. Anterior salivary glands lie on buccal mass; posterior salivary glands present, small, located posterior to brain.
   3. Esophagus twice length of intestine.
   4. Intestine straight.
   5. Digestive gland unilobular.
   
   
   

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   Figure. Digestive tract of G. boylei. Top - Lateral view. Bottom - Dorsal view of brain, buccal mass, esophagus and posterior salivary glands, paratype, male, 63 mm ML. Drawings from Collins (2003).

7. Beaks
   1. Lower beak with rounded hood; wing with diagonal flexure; lateral walls without ridges or folds. Photographs of the beaks can be found here.
      
   
   
   

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   Figure. Upper (left) and lower (right) beaks of G. boylei, paratype, male, 63 mm ML. Drawings from Collins (2003).

8. Male reproductive tract
   1. Accessory gland I largest.
   2. Penis long.
   
   
   

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   Figure. Dorsal (bottom) and ventral (top) views of the male reproductive tract of G. boylei, paratype, 63 mm ML. Drawings from Collins (2003).

9. Female reproductive tract
   1. Proximal portion of oviducal gland one third, cream color; distal portion two thirds, green/brown.
   
   
   

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   Figure. Ventral view of the female reproductive tract of G. boylei, paratype, female, 115 mm ML. Drawing from Collins (2003).

10. Pigmentation
    1. Entire digestive tract darkly pigmented.
    2. Skin deep red in fresh specimens, reddish-brown in preservation.
    3. Pigmentation of oral and aboral surfaces of arms greater than mantle.
    4. Posterior margin of fin purple.
       
       
11. Measurements
    1. Measurements and counts can be found here.

Comments

References

Collins, M. A. 2003. The genus Grimpoteuthis (Octopoda: Grimpoteuthidae) in the North-east Atlantic, with descriptions of three new species. Zoological Journal of the Linnean Society, 139 (1): 93-127.