SepiolidaMichael Vecchione and Richard E. Young
This tree diagram shows the relationships between several groups of organisms.
The root of the current tree connects the organisms featured in this tree to their containing group and the rest of the Tree of Life. The basal branching point in the tree represents the ancestor of the other groups in the tree. This ancestor diversified over time into several descendent subgroups, which are represented as internal nodes and terminal taxa to the right.
You can click on the root to travel down the Tree of Life all the way to the root of all Life, and you can click on the names of descendent subgroups to travel up the Tree of Life all the way to individual species.close box
Members of the Sepiolida are short (mostly 2-8 cm ML), broad cephalopods with a rounded posterior mantle.
A sepioid ...
- with a short, rounded body.
- without a cuttlebone.
- Eye pore outside of ventral eyelid.
- Dorsal margin fused to or free from head.
- Ventral mantle adductor present.
- Fins broad (length ca. less than two times, usually equal to, individual fin width).
- Attachment of posterior fin-lobes broadly separated.
- Shell a thin or rudimentary gladius or absent.
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.
Page copyright © 2004 and
Page: Tree of Life Sepiolida 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.
- First online 21 August 2004
Citing this page:
Vecchione, Michael and Richard E. Young. 2004. Sepiolida http://tolweb.org/Sepiolida/23872/2004.08.21 in The Tree of Life Web Project, http://tolweb.org/. Version 21 August 2004 (under construction).