Note

Pterygioteuthis hoylei: description continued

Annie Lindgren
  1. Arms
    1. Arms I - with globular suckers distal to hooks.
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      Click on an image to view larger version & data in a new window


      Figure. Oral view of arm I from P. hoyleiTop - female, right arm, distal region (with globular suckers).  Bottom - male, left arm. ©

    2. Arms II - males can have enlarged hooks and hook sheaths.
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      Click on an image to view larger version & data in a new window


      Figure.  Right arm II of a male P. hoylei. Top - 4 hooks with sheaths intact.  Bottom - 4 hooks with sheaths removed.  ©

    3. Arm IV - right.
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      Click on an image to view larger version & data in a new window


      Figure.  A female P. giardi (with no suckers or hooks).  Stained faintly with methylene bllue (green color). ©

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


      Figure.  Oral view of male for P. hoyleiTop - 1 sucker and 2 hooks visible.  Bottom - a recently preserved specimen with hooks, protective membranes, and chromatophores between membranes still visible. ©

    4. Arm IV - hectcotylus
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      Click on an image to view larger version & data in a new window

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

      Figure. Hectocotylus (left arm IV) from a male P. hoylei. Top/Left - close-up view of hectocotyus teeth.  Bottom/Right - complete view of hectocotylized arm.  ©

    5. Close-up of hectocotylus membrane (with numerous ridges and 2 large teeth)
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      Click on an image to view larger version & data in a new window

      Figure. Lateral side view of the hectocotylus plate and surrounding membranes from P. hoylei. ©

  2. Tentacle club suckers in 4 even series.
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    Click on an image to view larger version & data in a new window

    Figure.  Oral view of tentacle club for a female P. hoylei. ©

  3. Head
    1. Buccal crown with ridges only.
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      Click on an image to view larger version & data in a new window

      Figure.  Oral view of the buccal membrane of a male P. hoylei. Note ridges that run along buccal membrane.  ©

  4. Photophores
    1. Visceral photophores
      1. 1 abdominal organ (with 3 additional small organs anterior - posteriormost not visible in picture below).
      2. 2 branchial organs.
      3. 2 anal organs (smaller than branchial).
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      Click on an image to view larger version & data in a new window

      Figure.  Ventral view of visceral photophores in a female P. hoylei. ©

    2. Eye photophores with 10 large and 5 minute organs.
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      Click on an image to view larger version & data in a new window

      Figure.  Ventral view of the small eye photophores of P. hoylei. © n

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Ohio State University, Columbus, Ohio, USA

Correspondence regarding this page should be directed to Annie Lindgren at

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