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Astacidae Latreille

Keith A. Crandall, James W. Fetzner, Jr., and Horton H. Hobbs, Jr.
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Pacifastacus (Pacifastacus) leniusculus habitus
taxon links [up-->]Astacus [up-->]Pacifastacus [down<--]Astacoidea 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.

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Containing group: Astacoidea

References

Faxon, W. 1914. Notes on the crayfishes in the United States National Museum and the Museum of Comparative Zoology with descriptions of new species and subspecies to which is appended a catalogue of the known species and subspecies. Memoirs of the Museum of Comparative Zoology 40:352-427.

Hobbs, H.H., Jr. 1988. Crayfish distribution, adaptive radiation and evolution. Pp. 52-82 in D.M. Holdich and R.S. Lowery (eds), Freshwater crayfish: biology, management and exploitation. Timber Press, Portland.

Hobbs, H. H. Jr. 1989. An Illustrated Checklist of the American Crayfishes (Decapoda: Astacidae, Cambaridae, and Parastacidae). Smithsonian Institution Press.

Title Illustrations
Click on an image to view larger version & data in a new window
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Pacifastacus (Pacifastacus) leniusculus habitus
Scientific Name Pacifastacus (Pacifastacus) leniusculus
Copyright © 1995 David Holdich
About This Page
Page constructed by Emily Browne.

Keith A. Crandall
Brigham Young University, Provo, Utah, USA

James W. Fetzner, Jr.
Carnegie Museum of Natural History, Pittsburgh, Pennsylvania, USA

Horton H. Hobbs, Jr.
Wittenberg University, Springfield, Ohio, USA

Correspondence regarding this page should be directed to Keith A. Crandall at

All Rights Reserved.

Citing this page:

Crandall, Keith A., James W. Fetzner, Jr., and Horton H. Hobbs, Jr. 2001. Astacidae Latreille. Version 01 January 2001 (under construction). http://tolweb.org/Astacidae/6667/2001.01.01 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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