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Euprymna Steenstrup, 1887

Richard E. Young and Michael Vecchione
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This genus contains the following eight species:
Containing group: Sepiolinae

Introduction

Species of Euprymna are small (up to a few cm in ML), benthic sepiolids sometimes found in water less than 1 m in depth.

Diagnosis

A sepiolin ...

Characteristics

  1. Arms
    1. Arm suckers usually in four series; in two series in E. phenax.
    2. Hectocotylus - left arm I; also enlargement of suckers of marginal series of some other arms.
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      Figure. Oral view of partial arm crown with both arms I and left arms I-IV. Left - E. phenax, male, 11 mm ML, holotype. Right - E. albatrossae, male, 24 mm ML. Both species from Philippine waters. Drawings from Voss (1963).

    3. Arms III not unusually thick and robust; rarely curled inward in preservation when other arms are not.

  2. Tentacles
    1. Tentacular clubs with suckers in more than 32 series.
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      Figure. Dorsal views of the two species shown above (left - E. phenax, right - E. albatrossae). Note the shape of the clubs and the presence of keels (typical Sepiolinae feature). Drawings from Voss (1963).

  3. Photophores.
    1. Pair of bean-shaped visceral photophores.
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      Figure. Ventral view of the visceral photophores of E. scolopes. The silvery reflectors are covered in their centers by extensions of the ink sac. The photogenic region of each reflector is medially located and the two organs are joined by a narrow duct. Photograph by R. Young.

  4. Gladius
    1. Gladius present as a distinct rudiment

Distribution

Indo-Pacific waters, shelf and upper slope (Nesis, 1982/87).

References

Nesis, K. N. 1982/87. Abridged key to the cephalopod mollusks of the world's ocean. 385+ii pp. Light and Food Industry Publishing House, Moscow. (In Russian.). Translated into English by B. S. Levitov, ed. by L. A. Burgess (1987), Cephalopods of the world. T. F. H. Publications, Neptune City, NJ, 351pp.

Voss, G. L. 1963. Cephalopoda of the Philippine Islands. Bull. U. S. Nat. Mus., 234: 1-180.

Title Illustrations
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Scientific Name Euprymna tasmanica
Location off Australia
Copyright © 1996 Mark Norman
About This Page


University of Hawaii, Honolulu, HI, USA


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

Page: Tree of Life Euprymna Steenstrup, 1887. 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. 1996. Euprymna Steenstrup, 1887. Version 01 January 1996 (under construction). http://tolweb.org/Euprymna/20036/1996.01.01 in The Tree of Life Web Project, http://tolweb.org/

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