Overview

Brief Summary

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 ...

  • with visceral photophores.
  • with, usually, four sucker series on arms.

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Comprehensive Description

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.

      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.

      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.

      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

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Distribution

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

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Ecology

Habitat

Depth range based on 35 specimens in 10 taxa.
Water temperature and chemistry ranges based on 18 samples.

Environmental ranges
  Depth range (m): 1 - 1000
  Temperature range (°C): 4.558 - 28.756
  Nitrate (umol/L): 0.008 - 41.466
  Salinity (PPS): 33.152 - 35.932
  Oxygen (ml/l): 0.607 - 5.446
  Phosphate (umol/l): 0.044 - 2.982
  Silicate (umol/l): 1.242 - 90.947

Graphical representation

Depth range (m): 1 - 1000

Temperature range (°C): 4.558 - 28.756

Nitrate (umol/L): 0.008 - 41.466

Salinity (PPS): 33.152 - 35.932

Oxygen (ml/l): 0.607 - 5.446

Phosphate (umol/l): 0.044 - 2.982

Silicate (umol/l): 1.242 - 90.947
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.

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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage

Barcode of Life Data Systems (BOLD) Stats
                                        
Specimen Records:53Public Records:53
Specimens with Sequences:53Public Species:5
Specimens with Barcodes:53Public BINs:12
Species:5         
Species With Barcodes:5         
          
Creative Commons Attribution 3.0 (CC BY 3.0)

© Barcode of Life Data Systems

Source: Barcode of Life Data Systems (BOLD)

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Barcode data

Creative Commons Attribution 3.0 (CC BY 3.0)

© Barcode of Life Data Systems

Source: Barcode of Life Data Systems (BOLD)

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Wikipedia

Euprymna

Euprymna is a genus of bobtail squid comprising around ten species. [1]

Species

Genus Euprymna

Nomen dubium

References

  1. ^ a b Bouchet, P. (2012). Euprymna. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=341426 on 2012-06-18
Creative Commons Attribution Share Alike 3.0 (CC BY-SA 3.0)

Source: Wikipedia

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