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Sicariidae

Greta Binford
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taxon links [up-->]Sicarius [up-->]Loxosceles Monophyly Uncertain[down<--]Haplogynae Interpreting the tree
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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.

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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 see Interpreting the Tree or Classification. To learn more about phylogenetic trees, please visit our Phylogenetic Biology pages.

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Containing group: Haplogynae

Characteristics

Note the violin shaped mark on the cephalothorax (front half of body) and the six eyes, grouped in pairs.

References

Binford, G.J., Callahan, M.S., Bodner, M.R., Rynerson, M.R., Berea Núñez, P., Ellison, C.E., Duncan, R.P. 2008. Phylogenetic relationships of Loxosceles and Sicarius spiders are consistent with Western Gondwanan vicariance. Molecular Phylogenetics and Evolution 49:538-553.

Platnick, N. I., J. A. Coddington, R. R. Forster, and C. E. Griswold. 1991. Spinneret Morphology and the Phylogeny of Haplogyne Spiders (Araneae, Araneomorphae). American Museum Novitates 3016: 1-73.

Title Illustrations
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
Scientific Name Sicarius terrosus
Location Parque Sierra de las Quijadas, Argentina
Creator Dr. Kenneth Cramer
Specimen Condition Live Specimen
Image Use creative commons This media file is licensed under the Creative Commons Attribution-NonCommercial License - Version 3.0.
Copyright © 2005 Dr. Ken Cramer
Scientific Name Loxosceles laeta
Location ex Instituto Butanan, Sao Paulo, Brazil
Specimen Condition Live Specimen
Identified By Jonathan Coddington
Sex Female
Life Cycle Stage adult
Image Use creative commons This media file is licensed under the Creative Commons Attribution-NonCommercial License - Version 3.0.
Copyright © Jonathan Coddington
About This Page

Greta Binford
Lewis & Clark College, Portland, Oregon, USA

Correspondence regarding this page should be directed to Greta Binford at

All Rights Reserved.

Citing this page:

Binford, Greta. 2009. Sicariidae. Version 18 February 2009 (under construction). http://tolweb.org/Sicariidae/2731/2009.02.18 in The Tree of Life Web Project, http://tolweb.org/

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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.

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Sicariidae

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