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Mastigoteuthis tyroi Salcedo-Vargas, 1997

Mario Alejandro Salcedo-Vargas and Richard E. Young
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Containing group: Mastigoteuthidae

Introduction

This species is known from a single paralarva of 15 mm ML.

Diagnosis

A mastigoteuthid ...

Characteristics

  1. Arms
    1. Sucker dentition not examined.

  2. Tentacles
    1. Tentacle stalk short, thicker than arms IV.
    2. Club flattened on oral surface and expanded.
    3. Club suckers in 47 rows with 4-9 series across club.
    4. Tip of club narrow and elongate, without suckers.
    5. Sucker dentition not examined.
    6. Click on an image to view larger version & data in a new window
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      Figure. Aboral and oral views of tentacular clubs. Drawings from Salcedo-Vargas (1997).

  3. Head
    1. Funnel pocket unknown.

  4. Funnel
    1. Funnel locking- apparatus groove with simple structure lacking tragus or 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. Drawing from Salcedo-Vargas (1997)

  5. Mantle
    1. Transparent, cartilaginous, spiny-like tricuspid tubercules present on mantle and most other skin.

  6. Fins
    1. Fin longer than wide.
    2. Tail extends 20% of fin length.

  7. Photophores
    1. Photophores absent.

  8. Pigmentation
    1. Aboral surface of tentacle club and stalk with transverse pigment bands.
    2. Large chromatophores on both sides of head and at base of armature.
    3. Small chromatophores around anterior edge of mantle.

  9. Measurements
    Source Salcedo-Vargas, 1997
    Sex ?
    Mantle length 15
    Mantle width 3.5
    Head length 3.5
    Head width 2.5
    Fin length 8
    Fin width 12
    Arm I, length 1.2
    Arm II, length 1.8
    Arm III, length 1.2
    Arm IV, length 2.5
    Tentacle length 6
    Club length 3.5
    Eye diameter / Lens diam. 1.3 / 0.8

Comments

This paralarva is unlike any other described (although few species have described paralarvae) and is especially distinctive in having expanded tentacular clubs. The only species of Mastigoteuthis that has slightly expanded tentacle clubs as a subadult is M. cordiformis but this species is not known from the Indian Ocean.

Distribution

Type locality: Indian Ocean off the coast of Somalia at ca. 08.1°N, 56.1°E, 212 m depth. This species is known only from the type specimen.

References

Salcedo-Vargas, M. A. 1997. Cephalopods from the Netherlands Indian Ocean Programme (NIOP) - II. Mastigoteuthid lineage and related forms. Beaufortia, 47: 91-108.

Title Illustrations
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Scientific Name Mastigoteuthis tyroi
Reference Salcedo-Vargas, M. A. 1997. Cephalopods from the Netherlands Indian Ocean Programme (NIOP) - II. Mastigoteuthid lineage and related forms. Beaufortia, 47: 91-108.
Life Cycle Stage Paralarva
View Dorsal and ventral.
Size 15 mm ML
Type Holotype
Image Use creative commons This media file is licensed under the Creative Commons Attribution-NonCommercial License - Version 3.0.
Copyright © 2004
About This Page


Universidad Nacional Autónoma de México


University of Hawaii, Honolulu, HI, USA

Page: Tree of Life Mastigoteuthis tyroi Salcedo-Vargas, 1997. Authored by Mario Alejandro Salcedo-Vargas and 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:

Salcedo-Vargas, Mario Alejandro and Richard E. Young. 2007. Mastigoteuthis tyroi Salcedo-Vargas, 1997. Version 19 November 2007 (under construction). http://tolweb.org/Mastigoteuthis_tyroi/19526/2007.11.19 in The Tree of Life Web Project, http://tolweb.org/

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