Under Construction

Abraliopsis sp. NC4

Richard E. Young
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Containing group: Abraliopsis (Abraliopsis)

Introduction

Abraliopsis sp. NC4 is known only from the vicinity of New Caledonia. The largest female examined was 32 mm ML and the largest male was 21 mm ML (the smallest male examined was 16.5 mm ML and fully mature).

Brief diagnosis:

An Abraliopsis (abraliopsis) ...

Characteristics

 In addition to familial characters (listed on the Enoploteuthidae page) and generic characters (listed on the Abraliopsis page), Abraliopsis sp. NC4 has:
  1. Arms
    1. Arms IV moderately long. Arm IV length index - 81-100 (x̅ = 90.3, n = 12). Number of arm IV hooks - 16-20 (x̅ = 17.7,n= 12)
    2. Hectocotylus with long, low ventral flap; short, very low, distally-offset dorsal flap. The squid must be in very good condition in order to detect the dorsal flap; in most males examined (maximum size 21 mm ML) the dorsal flap could not be detected.
      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 distal portion of the hectocotylus of Abraliopsis sp. NC4, male, 19 mm ML. Arrows mark the endpoints of the dorsal and ventral flaps.

  2. Tentacle
    1. Club with large keel and carpal flap.
    2. Largest club hooks from ventral series about 3.5 times height of counterparts of dorsal series.
      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 same tentacular club of Abraliopsis sp. NC4, male, 19 mm ML. Top - Dorso-oral view. Bottom - Oral view. Photographs by R. Young.

  3. Head
    1. Head-width index not determined due to distortion from initial freezing.

  4. Fins
    1. Fin length index - 72; Fin width index - 92-114 (x̅ = 100.3, n = 6).

  5. Photophores
    1. Ocular photophores: 5; end members <2X larger than adjacent members.
    2. Integumental photophores: Head and mantle with scattered photophores.
      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. Abraliopsis sp. NC4 showing photophore arrangement. Left - Photograph of the ventral view of the preserved squid. Right- Same view, same squid, drawing from photograph with colored dots representing photophores. Red dots - Complex photophores. Blue dots - non-complex photophores. Images by R. Young.

      More information on the integumental photophores can be found here.

  6. Viscera
    1. Female: Spermatangia receptacles - Dorsal-collar pocket present on either side of nuchal cartilage. No posterior pocket between stellate ganglia.
      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. Abraliopsis NC4, mature female, 26 mmm ML showing spermatangia receptacles. Top - Dorsal view. Bottom - Dorsolateral view with mantle folded posteriorly. White arrows point to pigmented receptacles within collar.

  7. Measurements and counts:
      NEC-1008,  M011-40 NEC-1008,  M011-40
    NEC-1008,  M011-40
    NEC-1008,  M011-40
    NEC-1008,  M011-40
    NEC-1008, M011-42
    Sex
    Male
    Male (mature) Male (mature)
    Male
    Male (mature) Male
    Mantle length
    19
    21
    21
    19
    21
    19
    Head width index
    42.1
    38.1
    -
    -
    -
    46.3
    Fin Length index
    68.4 
    76.2
    73.8
    73.7
    71.9
    68.4
    Fin width index
    100
    104.8 91.9
    113.7
    96.7
    93.7
    Arm Length index (R/L):
    I
    73.7/-
    71.4/66.7
    61.9/57.1
    63.7/63.7
    65.2/60.5
    57.9/63.7
    II
    78.9/78.9
    71.4/-
    69/75.7
    74.7/66.8
    63.3/66.6
    70/72.1 
    III
    73.7/78.9
    81.0/76.2
    69.5/76.2
    73.7/70
    69.5/75.7
    73.7/-
    IV
    94.7/94.7
    100/95.2
    87.7/87.6
    86.8/92.1
    81.4/81.4
    89.5/91.1
    No. arm hooks (R/L):
    I
    -/20 16/17
    18/18
    18/18
    18/16
    18/18
    II
    21/23
    22/-
    20/17
    -/22
    19/17
    21/20
    III
    19/19
    16/18
    18/18
    20/20
    19/20
    18/-
    IV
    16/18
    20/20
    18/20
    21/21
    19/18 18/17
    Club length index (R/L)
    -
    23.8/-
    27.6/-
    27.9/27.9
    27.1/27.6
    26.8/27.4
    Club hooks (D/V)(R:L)
    -
    5/3; -
    5/4/-
    5/4; 5/3
    4/5??; 4/4 4/4; 4/5??
    Carpal suckers (R/L)
    -
    3/-
    4/-
    3/-
    4/-
    3/4

Comments

Comparisons of Abraliopsis sp. NC4 to other members of the subgenus can be found on the Abraliopsis (Abraliopsis) page.

Distribution

Geographical distribution. At present Abraliopsis sp. NC4 is known from only two localities northwest of New Caledonia: i8°00.4'S, 161°12.8'E and 19°36.7'S, 159°35.5'E.
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. Distribution of Abraliopsis sp. NC4. White dots represent the capture localities. Base map from Google Earth.app.

Title Illustrations
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Click on an image to view larger version & data in a new window
Scientific Name Abraliopsis sp. NC4
Location Vicinity of New Caledonia
Specimen Condition Dead Specimen
Sex Male
Life Cycle Stage Mature
View Ventral
Size 20 mm ML
Image Use creative commons This media file is licensed under the Creative Commons Attribution License - Version 3.0.
Copyright ©
About This Page


University of Hawaii, Honolulu, HI, USA

Correspondence regarding this page should be directed to Richard E. Young at

Page: Tree of Life Abraliopsis sp. NC4. Authored by 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.

Citing this page:

Young, Richard E. 2013. Abraliopsis sp. NC4. Version 03 November 2013 (under construction). http://tolweb.org/Abraliopsis_sp._NC4/149531/2013.11.03 in The Tree of Life Web Project, http://tolweb.org/

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