Under Construction

Mastigoteuthis glaukopis Chun, 1908

Richard E. Young and Michael Vecchione
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
Containing group: Mastigoteuthis glaukopis group

Introduction

The type description of M. glaukopis is based on a single, small squid (37 mm ML) with one intact tentacle, taken off the tropical, east African coast.

Brief diagnosis:

A member of the M. glaukopis Group with ...

Characteristics

  1. Arms
    1. Arm suckers with blunt, conical teeth around opening, with 5-7 slightly larger teeth distally.

  2. Tentacles
    1. Tentacle whiplike; club not wider than stalk.
    2. Club 70% of tentacle length.
    3. Club with indistinct undulating protective membrane.
    4. Proximally club with very small, scatteren suckers; club then widens to occupy half the tentacle surface. Distally club extends to leave only about one third of circumference bare with suckers situated close together, nearly touching one another.
    5. Club suckers become slightly larger distally except near tip.
    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. Tentacular club of M. glaukopis, holotype. Top - View of the twisted club and an aboral view of an enlargement of a portion of the club. Drawings from Chun (1910). Bottom - Slde view of portion of the club. The protective membrane can be detected but little remains of it. Photograph by R. Young

    7. Club suckers 0.1 mm in diameter.
    8. Club suckers with 10-12 small teeth at approximately regular intervals around inner ring. These teeth are difficult to distinguish from conical knobs on the outer rings.

  3. Head
    1. Eyes large (15% of ML); occupy most of head.
    2. Olfactory organ with short stalk; located on obliquely directed gelatinous pad of neck.
    3. Funnel pocket appears to be present (holotype). Funnel adductors show whitish through shallow funnel groove.

  4. Funnel locking-apparatus
    1. Funnel locking apparatus with tragus but no antitragus; however, "cartilaginous groove is slightly inflated at the position of the antitragus, so that it gives the indication of an antitragus."
    2. 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 funnel locking-apparatus of M. glaukopis, holotype. Drawing from Chun (1910).

  5. Mantle
    1. Tubercules absent from mantle and elsewhere.

  6. Fins
    1. Fin length about half of ML; shape nearly rhomboidal.

  7. Photophores
    1. Integumental photophores absent.
    2. Eyelid photophore present; 1 mm wide
    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. Side view of the head of M. glaukopis showing the eyelid photophore (arrow), holotype. Photograph by R. Young.

  8. Pigmentation
    1. Vivid reddish-brown color.
    2. Sparse chromatophores on tentacles and oral surfaces of arms.

  9. Measurements
  10. Measurements according to Chun (1910) are: Mantle length - 37 mm; mantle width - 8 mm; eye diameter - 5.5 mm ML; tentacle length - 84 mm; club length - 58 mm.

Comments

Although we have examined the holotype, most of the above description, with the exception of the photographs, is from Chun (1910) since many features are no longer apparent on the holotype. This young mastigoteuthid is similar to M. atlantica and M. famelica in lacking integumental photophores but having a large photophore on each eyelid. It differs from both species in the structure of the club suckers (i. e., small size; absence of large lateral pegs on outer ring). Since these latter features change with size, we can find no differences that separate M. glaukopis Chun, 1908 and it is probably synonymus with M. atlantica Joubin, 1933 or M. famelica Berry, 1909, but has priority over both. Until larger specimens of M. glaukopis are available from the Indian Ocean, we maintain all three species. We suspect, however, on the basis of the distinct protective membrane on the tentacular club in the illustrations of Chun (1910) (see above) that M. glaukopis and M. atlantica may be synonymous.

Distribution

Type locality: Indian Ocean off east African coast at 4°63'N, 48°37'E.

References

Chun, C. 1910. Die Cephalopoden. Oegopsida. Wissenschaftliche Ergebnisse der Deutschen Tiefsee Expedition auf dem Dampfer "Valdivia" 1898-1899, 18(1):1-401.

Title Illustrations
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
Scientific Name Mastigoteuthis glaukopis
Comments Side (top) and ventral views.
Reference Chun, C. 1910. Die Cephalopoden. Oegopsida. Wissenschaftliche Ergebnisse der Deutschen Tiefsee Expedition auf dem Dampfer "Valdivia" 1898-1899, 18(1):1-401.
View Dorsal and ventral
Size 37 mm ML
Type Holotype
Scientific Name Mastigoteuthis glaukopis
Specimen Condition Preserved
View Ventral
Size 37 mm ML
Type Holotype
Image Use creative commons This media file is licensed under the Creative Commons Attribution-NonCommercial License - Version 3.0.
Copyright ©
About This Page


University of Hawaii, Honolulu, HI, USA


National Museum of Natural History, Washington, D. C. , USA

Page: Tree of Life Mastigoteuthis glaukopis Chun, 1908. Authored by Richard E. Young and Michael Vecchione. 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 Michael Vecchione. 2007. Mastigoteuthis glaukopis Chun, 1908. Version 19 November 2007 (under construction). http://tolweb.org/Mastigoteuthis_glaukopis/52637/2007.11.19 in The Tree of Life Web Project, http://tolweb.org/

edit this page
close box

This page is a Tree of Life Leaf Page.

Each ToL leaf page provides a synopsis of the characteristics of a group of organisms representing a leaf at the tip of the Tree of Life. The major distinction between a leaf and a branch of the Tree of Life is that a leaf cannot generally be further subdivided into subgroups representing distinct genetic lineages.

For a more detailed explanation of the different ToL page types, have a look at the Structure of the Tree of Life page.

close box

Mastigoteuthis glaukopis

Page Content

articles & notes

collections

people

Explore Other Groups

random page

  go to the Tree of Life home page
top