• 
  • Containing Groups
  • Scorpionida
  • Arachnida
  • Arthropoda
  • Bilateria
  • Animals
  • Eukaryotes
  • Life on Earth
• 
  • Other Scorpionida
  • Protoscorpiones
  • Palaeoscorpiones
  • Scorpiones
• 
  • Subgroups
  • Buthoidea
  • Chactoidea
  • Scorpionoidea
  • Vaejovoidea

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.

For more information on ToL tree formatting, please seeInterpreting the Tree or Classification. To learn more about phylogenetic trees, please visit ourPhylogenetic Biology pages.

Other Names for Scorpiones

• Scorpions

References

Stockwell, S.A. 1989. Revision of the Phylogeny and Higher Classification of Scorpions (Chelicerata). Ph.D. Dissertation, University of California, Berkeley. 413 pp.

Information on the Internet

• TheScorpion Emporium

Title Illustrations

Click on an image to view larger version & data in a new window

Centruroides vittatus (Buthoidea).
Photograph copyright © Scott A. Stockwell.

Copyright	© 1988 Scott A. Stockwell

About This Page

Scott A. Stockwell
Walter Reed Biosystematics Unit Museum Support Center, Smithsonian Institution Washington, D. C., USA

Page copyright © 1996Scott A. Stockwell

This page is aTree 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 abranch and aleaf 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 theStructure of the Tree of Life page.

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