Under Construction

Enoploteuthis jonesi Burgess 1982

Kotaro Tsuchiya
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Containing group: Enoploteuthis

Introduction

Enoploteuthis jonesi, a relatively small-sized species for the genus, attains 70mm DML. This species resembles the sympatrically occurring species E. higginsi, but separable by the small numbers and relatively narrow stripe arrangement of integumental photophores on the mantle and head.

Characteristics

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Figure. Tentacle club, Okinotorishima Island, Japan, from Tsuchiya (2000), male.

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Figure. Hectocotylus, Okinotorishima Island, Japan, from Tsuchiya (2000), male.

  1. Tentacle
    1. Tentacle long, with distinct club.
    2. Carpal cluster oval.
    3. Two rows of different-sized hooks on manus.
    4. Four rows of suckers on dactylus.
  2. Hectocotylus
    1. Hectocotylus with large truncate membranous flap on ventral edge and small semilunar one on the dorso-distal edge.
    2. Modified portion partially lacks armature.
  3. Integumental Photophores
    1. Ventral mantle with six longitudinal narrow stripes of integumental organs.
    2. Ventral head with four narrow longitudinal stripes of integumental organs that are interconnected at each end forming ring-like pattern.
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      Figure. Ventral view of the ventral head photophores of E. jonesi, paratype. Photograph by R. Young.

    3. Ventral side of arm III with a row of organs in about half of the arm length along the base of aobral keel.

Comments

This species closely resembles E. higginsi in almost all taxonomical characters. It is separable from E. higginsi by the small numbers of integumental photophores on the ventral head and mantle. In E. higginsi, each photophore stripe is formed by a few rows of organs with scattered intermediate organs while stripes are found by mostly by a single row of organs.

Life history

Eggs

Spawned eggs are ovoid, 0.94 x 0.77 mm, often with slightly greenish color, with a smooth chorion and distinct perivitellin space usually at both animal and vegetal poles.

Paralarva

Paralarva of present species is characterized by:
  1. Tentacular club not unusually short, and with few relatively large suckers on manus.
  2. Only scattered chromatophores on mantle and head in a particular pattern.

(Young and Harman, 1985)

Distribution

Geographical distribution

This species is distributed in the equatorial Pacific waters from the Northwest Pacific and Hawaii to Melanesia (Burgess, 1982; Riddell, 1985; Tsuchiya, 1993).

References

Burgess, L.A. 1982. Four new species of squid (Oegopsida: Enoploteuthis) from the central Pacific and a description of adult Enoploteuthis reticulata. Fishery Bulletin, 80(4):703-734, 7 figures.

Riddell, D.J. 1985. The Enoploteuthidae (Cephalopoda: Oegopsida) of the New Zealand region. Fisheries Research Bulletin (NZ), 27:1-52.

Title Illustrations
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Scientific Name Enoploteuthis jonesi
Location Okinotorishima Island, Japan
Reference from Tsuchiya (2000)
Sex Male
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Tokyo University of Fisheries, Tokyo, Japan

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Citing this page:

Tsuchiya, Kotaro. 2000. Enoploteuthis jonesi Burgess 1982. Version 01 January 2000 (under construction). http://tolweb.org/Enoploteuthis_jonesi/19709/2000.01.01 in The Tree of Life Web Project, http://tolweb.org/

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