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Sepiolida Keferstein, 1866

Michael Vecchione and Richard E. Young
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taxon links [up-->]Sepiadariidae [up-->]Sepiolidae [down<--]Sepioidea Interpreting the tree
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Containing group: Sepioidea

Introduction

Members of the Sepiolida are short (mostly 2-8 cm ML), broad cephalopods with a rounded posterior mantle.

Brief diagnosis

A sepioid ...

Characteristics

  1. Head
    1. Eye pore outside of ventral eyelid.
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      Click on an image to view larger version & data in a new window

      Figure. Lateral view of head of Rossia sp., 19 mm ML, female, preserved. Arrow points to eye pore.

  2. Mantle
    1. Dorsal margin fused to, or free, from head.
    2. Ventral mantle adductor present.
      3. 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 mantle cavity of Rossia sp., preserved. Arrow points to the cut surface of the ventral mantle adductor where it had attached to the ventral mantle wall. Anteriorly the adductor muscles pass to either side of the intestine. Photograph by R. Young.

  3. Fins
    1. Fins broad (length ca. less than two times, usually equal to, individual fin width).
    2. Posterior attachment of fins broadly separated from each other.

  4. Shell
    1. Shell a thin or rudimentary gladius or absent.
Title Illustrations
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Scientific Name Sepioloidea lineolata, Iridoteuthis iris
Copyright © 2004 Mark Noman, Thomas Burch
About This Page


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


University of Hawaii, Honolulu, HI, USA

Page: Tree of Life Sepiolida Keferstein, 1866. Authored by Michael Vecchione 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:

Vecchione, Michael and Richard E. Young. 2019. Sepiolida Keferstein, 1866. Version 26 March 2019 (under construction). http://tolweb.org/Sepiolida/23872/2019.03.26 in The Tree of Life Web Project, http://tolweb.org/

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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.

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