go to the Tree of Life home page
Under Construction
This is an archived version of a Tree of Life page. For up-to-date information, please refer to the current version of this page.

Enoploteuthis Orbigny in Rüppell 1844

Kotaro Tsuchiya
The following 10 species (E. leptura consists of two subspecies - E. l. leptura and E. l. magnoceani) are recognized in the genus.
Containing group: Enoploteuthidae


Members of this genus are most easily recognized by their larger tail compared to members of other genera in the family. The size of the tail is emphasized by the absence of fins along its sides. This contrasts with the narrow extension of the fins along the tails of members of other genera.


From Young, et al., 1998.
  1. Arms
    1. Suckers present distally on Arms IV.
  2. Tentacles
    1. Manus of club with two series of hooks; marginal suckers absent.
  3. Buccal crown
    1. Typical chromatophores on aboral surface; may have light epithelial pigmentation on oral surface.
  4. Photophores
    1. Tips of arms IV lack enlarged organs.
    2. Nine to ten organs on eyeball.
    3. Complex organs of integument, in life, without red-colored filters.
  5. Fins
    1. Subterminal (broad tail present).


Enoploteuthis has only two clearly defined types of integumental photophores in contrast to other enoploteuthid genera which have three types of photophores on the ventral surfaces of the head, funnel and mantle. The most complex type is found in all species examined and seems to be distinctive of the genus.

 image info

The photomicrograph shows three small (small arrows) and two large (large arrows) "simple" photophores with dark blue centers and a narrow white ring and five, slightly larger "complex" filtered photophores that exhibit three different physiological states in the photo. The central core in these shows varying degrees of transparency. The bright spot in the core of the most transparent photophore is a reflection off the axial color filter that lies buried in the center of the organ. The small dark spots and reddish patches are chromatophores.

 image info

The photomicrograph shows primarily the photophores on the eyeball (large white organs) which are much larger than the integumental photophores. Note the large terminal photophores and the smaller photophores between them. Photophores in the latter group alternate between having light and dark cores. The reason for this is unknown.


Burgess, L. A. 1982. Four new species of squid (Oegopsida: Enoploteuthis) from the Central Pacific and a description of adult Enoploteuthis reticulata. Fish. Bull. 80: 703-734.

Young, R. E., L. A. Burgess, C. F. E. Roper, M. J. Sweeney and S. J. Stephen. 1998. Classification of the Enoploteuthidae, Pyroteuthidae and Ancistrocheiridae. Smithsonian Contr. to Zoology, 586: 239-255.

Title Illustrations

Enoploteuthis leptura, off the Bahamas, frame from a videotape recorded in situ from a submersible.

Other photos

About This Page

Tokyo University of Fisheries, Konan, Minato, Tokyo

Citing this page:

Tsuchiya, Kotaro. 2000. Enoploteuthis Orbigny in Rüppell 1844. Version 01 January 2000 (under construction). http://tolweb.org/Enoploteuthis/19641/2000.01.01 in The Tree of Life Web Project, http://tolweb.org/

close box

This page is a Tree of Life Branch Page.

Each ToL branch page provides a synopsis of the characteristics of a group of organisms representing a branch of the Tree of Life. The major distinction between a branch and a leaf of the Tree of Life is that each branch can be further subdivided into descendent branches, that is, 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


Page Content




Explore Other Groups

random page