Under Construction

Pelobatoidea

David Cannatella
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
taxon links [up-->]Pelodytidae [up-->]Scaphiopodidae [up-->]Pelobatidae [up-->]Eopelobatinae [up-->]Megophryidae extinct icon Not Monophyletic[down<--]Anura Interpreting the tree
close box

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.

close box
Containing group: Anura

Discussion of Phylogenetic Relationships

The name was applied to the node that is the common ancestor of living Megophryidae, Pelobatidae, and Pelodytes. Synapomorphies of Pelobatoidea include the presence of a palatine process of the maxilla and ossification of the sternum into a bony style (Cannatella, 1985). Duellman and Trueb (1986) listed the presence of a dorsal gap in the cricoid ring as a synapomorphy for this clade. However, there is no gap in Scaphiopus, Spea, Pelobates (except for the smallest species, P. fuscus), or several megophryids; at best, the presence of a dorsal gap would be an ambiguous synapomorphy. Relationships among the living pelobatoids are an unresolved trichotomy of Megophryidae, Pelobatidae, and Pelodytes.

References

Cannatella, D. C. 1985. A phylogeny of primitive frogs (archaeobatrachians). Ph.D. Dissertation, The University of Kansas, Lawrence.

Duellman, W. E., and L. Trueb. 1986. Biology of Amphibians. McGraw-Hill Book Co., New York.

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 Scaphiopus holbrookii hurteri
Image Use creative commons This media file is licensed under the Creative Commons Attribution-ShareAlike License - Version 3.0.
Copyright © 1995 David Cannatella
Scientific Name Pelobates syriacus
Location Romania
Specimen Condition Live Specimen
Identified By Horia Bogdan
Image Use creative commons This media file is licensed under the Creative Commons Attribution-NonCommercial License - Version 2.0.
Copyright © Horia Bogdan
Scientific Name Megophrys montana
Image Use creative commons This media file is licensed under the Creative Commons Attribution-ShareAlike License - Version 3.0.
Copyright © 1995 David Cannatella
About This Page

David Cannatella
University of Texas, Austin, Texas, USA

Correspondence regarding this page should be directed to David Cannatella at

Page: Tree of Life Pelobatoidea. Authored by David Cannatella. The TEXT of this page is licensed under the Creative Commons Attribution 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:

Cannatella, David. 2008. Pelobatoidea. Version 11 January 2008 (under construction). http://tolweb.org/Pelobatoidea/16976/2008.01.11 in The Tree of Life Web Project, http://tolweb.org/

edit this page
close box

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.

close box

Pelobatoidea

Page Content

articles & notes

collections

people

Explore Other Groups

random page

  go to the Tree of Life home page
top