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Bay ghost shrimp  Purple shore crab
taxon links [up-->]Caridea [up-->]Sergestoidea [up-->]Polychelida [up-->]Anomura [up-->]Penaeoidea [up-->]Gebiidea [up-->]Procarididea [up-->]Astacidea [up-->]Achelata [up-->]Brachyura [up-->]Glypheidea [up-->]Axiidea [up-->]Stenopodidea [down<--]Malacostraca 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.

example of a tree diagram

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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The relationships of the major decapod infraorders shown above is based on the phylogeny estimated by Porter et al. (2005).
Containing group: Malacostraca


Abele, L. G. 1991. Comparison of morphological and molecular phylogeny of the Decapoda. Memoirs of the Queensland Museum 31:101-108.

Abele, L. G. and B. E. Felgenhauer. 1986. Phylogenetic and phenetic relationships among the lower Decapoda. Journal of Crustacean Biology 6:385-400.

Dixon, C. J., S. T. Ahyong, and F. R. Schram. 2003. A new hypothesis of decapod phylogeny. Crustaceana 76:935-975.

Feldmann, R. M. 2003. The Decapoda: New initiatives and novel approaches. Journal of Paleontology 77 (6):1021-1039.

Kim, W. and L. G. Abele. 1990. Molecular phylogeny of selected decapod crustaceans based on 18S rRNA nucleotide sequences. Journal of Crustacean Biology 10:1-13.

Martin, J. W. and T. A. Haney. 2005. Decapod crustaceans from hydrothermal vents and cold seeps: a review through 2005. Zoological Journal of the Linnean Society 145(4):445-522.

Miller, A. D. and C. M. Austin. 2006. The complete mitochondrial genome of the mantid shrimp Harpiosquilla harpax, and a phylogenetic investigation of the Decapoda using mitochondrial sequences. Molecular Phylogenetics and Evolution 38(3):565-574.

Morrison, C.L., A. W. Harvey, S. Lavery, K. Tieu, Y. Huang and C.W. Cunnigham. 2002. Mitochondrial gene rearrangements confirm the parallel evolution of the crab-like form. Proceedings of the Royal Society of London Series B 269:345-350.

Porter, M. L., M. Pérez-Losada, and K. A. Crandall. 2005. Model-based multi-locus estimation of decapod phylogeny and divergence times. Molecular Phylogenetics and Evolution 37(2):355-369.

Scholtz, G. and S. Richter. 1995. Phylogenetic systematics of reptantian Decapoda (Crustacea, Malacostraca). Zoological Journal of the Linnean Society 113:289-328.

Schram, F. R. 2001. Phylogeny of decapods: moving towards a consensus. Hydrobiologia 449:1-20.

Information on the Internet

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
Bay ghost shrimp
Scientific Name Neotrypaea californiensis
Comments Bay ghost shrimp (Anomura)
Creator Gerald and Buff Corsi
Source Collection CalPhotos
Copyright © 1999 California Academy of Sciences
Scientific Name Panulirus argus
Comments Caribbean spiny lobster
Source Panulirus argus; Spiny Lobster
Source Collection CalPhotos
Copyright © 2002
Purple shore crab
Scientific Name Hemigrapsus nudus
Comments Purple shore crab (Brachyura)
Creator Gerald and Buff Corsi
Source Hemigrapsus nudus; Purple Shore Crab
Source Collection CalPhotos
Copyright © 1999 California Academy of Sciences
About This Page

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

Page: Tree of Life Decapoda. The TEXT of this page is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike 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:

Tree of Life Web Project. 2010. Decapoda. Version 11 March 2010 (temporary). http://tolweb.org/Decapoda/6308/2010.03.11 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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