Under Construction

Abraliopsis sp. Z

Richard E. Young
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Containing group: Abraliopsis (Abraliopsis)

Introduction

Abraliopsis sp. Z is one of the more distinctive species of the subgenus. It is presently known only from the South Atlantic. Males reach at least 32 mm ML and females at least 35 mm ML.

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. Z has:
  1. Arms
    1. Hectocotylus (right arm IV): Venral flap slightly bilobed and biconcave. Dorsal flap absent. Hooks extend distal to ventral flap.
    2. Hooks of arms IV smaller than those of arms I-III, latter hooks about equal in size.
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      Click on an image to view larger version & data in a new window

      Figure. Ventral view with a disral oral twist of the hectocotylus of Abraliopsis sp. Z, 28 mm ML. Note the large ventral flap and the absence of a dorsal flap near anterior end of the ventral flap. Photograph 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 hectocotylus of Abraliopsis sp. Z, 29 mm ML. Note the broad ventral lobe and the absence of a dorsal lobe. Photograph by R. Young.

    3. Arms IV: bare region in females about equal in length to arm tip bearing three black photophores.
    4. Right arm III (35 mm ML, female) with 24 suckers at arm tip; largest with about 7 pointed teeth on distal half of inner ring.

  2. Tentacles
    1. Club: Large keel and large carpal flap.
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      Click on an image to view larger version & data in a new window

      Figure. Dorso-oral (top) and ventro-oral (bottom) views of the tentacular club of Abraliopsis sp. Z, female, 29 mm ML. Photographs by R. Young.

  3. Head
    1. Occipital folds 1-4 well developed with distinct posteriorly cresent ridge connecting folds 3 and 4.

  4. Photophores
    1. Ocular photophores: xx
    2. Integumental photophores: Head with scattered photophores but not a random scatter as a hint of a pattern is seen. 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. Ventral views of the integumental photophores of Abraliopsis sp. Z, female 29 mm ML. Left - Photograph of the preserved squid. Right - Outline drawing from photograph with all integumental photophores represented by colored dots. Red dots - Complex photophores. Blue dots - Non-complex photophores. Images by R. Young.

      More details of the integumental photophores can be found here.

  5. Viscera
    1. Spermatangia receptacles located dorsally beneath collar and adjacent to nuchal cartilage. No indication of an area for receptacles where gladius joins viscera.

  6. Measurements and counts:
       
    Sex
    Female
    Mantle length
    35
    Head width index
     -
    Fin Length index
    74
    Fin width index
    100
     Arm Length index, I
     -
                       II
    54/
                      III
    57/57
                      IV
    77+/80
     No. hooks, I
    16/15
                      II
    16/16
                      III
    17/19
                      IV
    18/18
    Club length index
     -
    Club hooks
    3/3; -

Distribution

Abraliopsis sp. Z is known from only a few locations on either side of the South Atlantic.
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Click on an image to view larger version & data in a new window

Figure. White dots show the capture localities of Abraliopsis sp. Z. The base map is 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. Z
Location Eastern South Atlantic at 30.12S, 5.40E
Specimen Condition Preserved
Identified By R. E. Young
Sex Female
View Ventral
Size 35 mm ML
Collection USNM 884900
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. Z. 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. Z. Version 03 November 2013 (under construction). http://tolweb.org/Abraliopsis_sp._Z/149564/2013.11.03 in The Tree of Life Web Project, http://tolweb.org/

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