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Abraliopsis hoylei (Pfeffer 1884)

Richard E. Young and Kotaro Tsuchiya
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Containing group: Abraliopsis (Abraliopsis)

Introduction

A. hoylei is the type species of the genus. This species was first described from, apparently, the Mascarene Islands (Pfeffer, 1912), western Indian Ocean. It is known from a single female specimen. Other records cannot be relied on as the number of new and unknown species makes earlier identifications questionable.

Characteristics


Figure. Oral view of tentacular club
of A. hoylei. Drawing from Pfeffer (1912).

 

  1. Tentacle clubs
    1. Large ventral hooks of manus about 3 times height of counterparts of dorsal series (judging from drawing).Text states "Due to its strong dehydration, the distal part of the club cannot be well described." (Pfeffer, 1912)
    2. Carpal flap absent (?); aboral keel present (judging from drawing).

  2. Arms
    1. Arms IV modelate in lenght; ALI IV = ca.75.
    2. Arms each with 19 - 21 hooks; arm III with 27 suckers total in two series; largest suckers with "pointed denticles on the upper edge."
  3. Hectocotylus
    1. Hectocotylus not known.

  4. Integumental Photophores

    Pfeffer (1912) describes the photophores in detail based mostly on the arrangement of "large" photophores. We interpret his description as indicating the presence of the following ventral head photophores:

    1. Median head series.
    2. Mediolateral head series.
    3. Lateral head series.

        Figure. Ventral view of A. hoylei showing assumed
        arrangement of ventral head, arms and mantle photophores
        (red lines), based on Pfeffer's description and the illustration. Drawing modified from Pfeffer (1912).

    4. Also mentioned: First lateral series, second lateral series (head); median mantle sector in posterior 2/3 of mantle, angle mantle series.
  5. Measurements and counts

    Sex
    Female
    Mantle length
    29.5
    Fin Length
     23
    Fin width
     28
    No. arm hooks
    19-21

Comments

Taxonomic status of this species is unclear. IF our interpretation of the photophore arrangements are correct, A. hoylei may not belong in the subgenus Abraliopsis, neither does the pattern fit any other known species of the genus. This suggests that our interpretation is incorrect. Unfortunately the type specimen is no longer extant. Specimens are needed from the presumed type locality.

Distribution

Geographical Distribution

Type locality: "ostensibly from the Mascarenes", western Indian Ocean.

References

Pfeffer, G. 1912. Die Cephalopoden der Plankton-Expedition. Zugleich eine monographische ubersicht der Oegopsiden Cephalopoden. Ergebnisse der Plankton-Expedition der Humboldt-stiftung, 2:1-815

Title Illustrations
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Click on an image to view larger version & data in a new window
Scientific Name Abraliopsis hoylei
Location "Allegedly from the Mascarenes" Indian Ocean
Reference Pfeffer, G. 1912. Die Cephalopoden der Plankton-Expedition. Zugleich eine monographische ubersicht der Oegopsiden Cephalopoden. Ergebnisse der Plankton-Expedition der Humboldt-stiftung, 2:1-815
Sex Female
Life Cycle Stage Mature
View Ventral
Size 29.5 mm ML
About This Page


University of Hawaii, Honolulu, HI, USA


Tokyo University of Fisheries, Tokyo, Japan

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

Page: Tree of Life Abraliopsis hoylei (Pfeffer 1884). Authored by Richard E. Young and Kotaro Tsuchiya. 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. and Kotaro Tsuchiya. 2013. Abraliopsis hoylei (Pfeffer 1884). Version 03 November 2013 (under construction). http://tolweb.org/Abraliopsis_hoylei/19688/2013.11.03 in The Tree of Life Web Project, http://tolweb.org/

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