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Note

Grimpoteuthis discoveryi: Description Continued

Martin Collins, Richard E. Young, and Michael Vecchione
  1. Eyes
    1. Medium size (mean eye diameter 33.4% of head width in males and 31.2% in females).

  2. Funnel
    1. Funnel organ V-shaped.

  3. Fins
    1. Moderately long, fin span 64% of total length, 105% of head width.

  4. Gills
    1. Half-orange shape with broad lamellae.
    2. 6-8 primary lamellae/gill.
    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. Ventral view of the viscera of G. discoveryi, female, 55 mm ML. Drawing from Collins (2003).

  5. Optic lobes and nerves
    1. Optic lobes spherical.
    2. Single optic nerve bundle passes through/by white body.
    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. Optic lobe, optic nerve tract, white body and eye of G. discoveryi, female, 55 mm ML. Drawings from Collins (2003).

  6. Digestive tract
    1. Radula absent.
    2. Anterior salivary glands on buccal mass; posterior salivary glands absent.
    3. Esophagus two times intestine in length.
    4. Digestive gland unilobular.
    5. 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. Top - lateral view of the digestive tract of G. discoveryi. Bottom - Dorsal view of brain, buccal mass, esophagus and posterior salivary glands (arrow) of G. discoveryi, female, 55 mm ML. Drawings from Collins (2003).

  7. Beaks
    1. Lower beak with rounded hood only slightly raised above crest; wings with diagonal flexure; lateral walls without ridges or folds.
    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. Upper (left) and lower (right) beaks of G. discoveryi, female, 55 mm ML. Drawings from Collins (2003).

  8. Male reproductive tract
    1. Accessory gland I largest.
    2. Penis of moderate length.
    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. Dorsal (bottom) and ventral (top) views of the male reproductive tract of G. discoveryi, 50 mm ML, holotype. Drawings from Collins (2003).

  9. Female reproductive tract
    1. Larger distal portion of oviducal gland green or red-brown depending on preservative; proximal portion cream color.
    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 female reproductive tract of G. discoveryi, 51 mm ML. Drawing from Collins (2003).

  10. Pigmentation
    1. Oral and aboral surfaces of arms with deep purple pigmentation; mantle less pigmented.
    2. Posterior margins of fins with purple color.

  11. Measurements
    1. Measurements and counts can be found here.

Comments

The above description is from Collins, in press.

References

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

About This Page

Martin Collins
Aberdeen University, Aberdeen, UK


University of Hawaii, Honolulu, HI, USA


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

All Rights Reserved.

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