Note

New Species B: Description continued

Richard E. Young, Caroline Sanchez, and Valerie Allain
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 view of New Species B. Photograph by R. Young.

Characteristics

  1. Arms
    1. Proximal sucker distinctly largest on all arms.
    2. Suckers biserial proximally (5-10 suckers on each arm), multiple (3-6) series of suckers on distal 60% (arms IV) to 70% (arms I-III) of arms. Arms IV appear to reach 5-6 series near end of distal 60% of club, 5 series on arm III, 3 or 4 series on arm I and about 4 series on arm II.
    3. Transition gradual to smaller suckers and more numerous series gradual.
    4. Low aboral web between arms I, arns I and II, and arms II and III; deep web between arms III and IV.
    5. Low oral web (about one quarter the depth of the aboral web) between arms III and IV.
      6. 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. Oral views of suckers of arms of New Species B. Left top - Arm I. Left bottom - Arm II. Right - Arms III (top) and IV. Photographs by R. Young.


      Figure. Arm bases of New Species B. Left - Arms II-IV. Right - Arms II-IV. Note the enlarged proximal sucker. 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. Oral view of the brachial crown of the second specimen of NewSpeciesA. Photograph by R. Young.

  2. Tentacles
    1. Club with approximately 14 suckers in two series on distal portion of club; proximal portion with folded, semilunar keel. Damaged right club appears to have 12 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. Tentacular club of New Species B. Left - Oral view. Right - Aboral view. Photographs by R. Young. 

  3. Buccal crown
    1. Buccal crown thin, low, delicate and unpigmented. Buccal crown appears to have two ventra supports but connectives to arms IV cannot be seen.

  4. Head
    1. Eyes with corneas.
    2. Eyes without secondary eyelids.
    3. Tentacle pocket extends to midline on head posterior to bases of arms IV.
    4. Anterior eye pore present.
    5. Anterior eye pocket (part of tentacle pocket) absent.
    6. Olfactory organ lies with a pocket.
      7. 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 the head of New Species B showing the presence of a cornea, absence of a secondary eyelid and a large, circular pit containing the olfactory organ at the posterolateral corner of the head (the pit on the other side of the head was much smaller). Head lightly stained with methylene blue stain. Photograph by R. Young. 

  5. Funnel
    1. Funnel without lateral funnel adductor muscles.
    2. Funnel without funnel valve.
    3. Funnel fused to head except for anterior 2-3 mm and lateral margins.
    4. Funnel with dorsal and ventral funnel organs.
    5. Funnle component of the funnel/mantle locking-apparatus with simple, straight groove.
    6. Mantle component of the funnel/mantle locking-apparatus with simple, straight ridge that extends to the mantle margin.
      7. 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 an opened funnel of New Species B. Note the absence of the funnel valve. The left arrow points to a ventral pad of the funnel organ and the right arrow points to the dorsal pad. Funnel and adjacent regions stained lightly with methylene blue stain. Photograph by R. Young.

  6. Fins
    1. Fins broadly separate from eacy other posteriorly.
    2. Fins with free anterior and posterior lobes; anterior lobe largest.
    3. Fins rounded laterally.
      4. 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 view of the fins of New Species B. Arrows point to the attachment sites of the fin lobes. Photograph by R. Young. 

  7. Pigmentation
    1. Numerous reddish brown chromatophores on mantle, head, across nuchal fusion, aboral surfaces of arms (oral surfaces with few, small, scattered chromatopores) and fins (ventral surface of fins without chromatophores on peripherial third).
    2. Chromatophores more numerous on dorsal surfaces.
    3. Tentacles with numerous, small and well-separated chromatophores on aboral surface.
    4. Funnel without chromatophores.

  8. Gladius
    1. Gladius with Y-shape.
    2. Gladius with central rhachis.
    3. Vanes diverge posteriorly into large lateral lobes. that Y-shape.
    4. Gladius extremely thin and fragile.
      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 view of the reconstructed gladius of New Species B. The rhachis is torn and bent at right angles to the gladius (left tip in photograph. The right lobe of the vane tore lose during extraction and has been photographically returned to its natural position. Part of the gladius is missing. Photograph by R. Young. 


      Figure. Dorsal view of portions of the gladius of New Species B. Left - The anterior tip of the rhachis. Richt - Anterior ends of the vanes. Photographs by R. Young. 


      Figure. Dorsal view of portions of the gladius of New Species B. Left - Lateral  lobe of the left vane. Right - Medial portion of the right vane and the posterior tip of the rhachis. Photographs by R. young.

  9. Viscera
    1. Penis appears to arise from open genital pocket or deep, circular fold in lining of mantle cavity.
    2. Ventral mantle adductor muscle very thin and weak.
    3. Large anal flaps present.
      4. 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 - Ventral view of the mantle cavity of New Species B. Arrow points to the penis. Bottom - Spermatangium removed from the penis of New Species B (presumably an aberrant discharge of the spermatophore). Photographs by R. Young.

  10. Measurements and counts
    Sex  Mature male 
    Mantle length  22 mm
    Mantle width  14 mm 
    Distance abetween stellate gang.  8 mm 
    Head width  14 mm 
    Head length  8.0 mm
    Nuchal fusion width  4.6 mm
    Eye diameter  ~ 5.7 mm
    Fin length  11.3 mm
    Fin width (single fin)
    		 7.2 mm
    Arm I, length  16 mm 
    Arm II, length
    		18 mm 
    Arm III, length
    		19 mm 
    Arm IV, length
    		19 mm 
    Tentacle length  50 mm 
    Club length  2.2 mm1, 1.3 mm2 
    Web depth, sector A  3.2
    Web depth, sector B
    		3.2 mm 
    Web depth, sector C
    		3.2 
    Web depth, sector D  5.3 mm 
    Oral web depth, sector D  1.4 mm 
    1Total length of club.
    2Length of sucker-bearing region of club.
About This Page


University of Hawaii, Honolulu, HI, USA


Secretariat of the Pacific Community


Secretariat of the Pacific Community, Noumea, New Caledonia

Page: Tree of Life New Species B: Description continued Authored by Richard E. Young, Caroline Sanchez, and Valerie Allain. 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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