Oh my goodness! Unless you are a Tree of Life developer, you really shouldn't be here. This page is part of our beta test site, where we develop new features for the ToL, often messing up a thing or two in the process. Please visit the official version of this page, which is available here.
Under Construction

Notobatrachus degiustoigroup is extinct

David Cannatella
Containing group: Salientia


Notobatrachus degiustoi is a Middle Jurassic (155-170 million years old) frog known from several well-preserved specimens from the La Maltilde Formation in Santa Cruz Province, Patagonia, Argentina. Most of the specimens are 100-120 mm in snout-vent length, although some reach 150 mm.

Phylogenetic Position of Notobatrachus degiustoi

The phylogenetic analysis of Báez and Basso (ms) and Cannatella (1985) placed Notobatrachus as the sister-group of living frogs (Anura). Estes and Reig (1973) proposed that it might be more closely related to Leiopelma.

Ford and Cannatella (1993) defined Anura as a node-based name for the ancestor (most recent) of living frogs and all its descendants. Therefore, Notobatrachus may or may not be part of Anura, depending on whether it is the sister-group of Anura or more closely related to Leiopelma.


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

Estes, R., and O. A. Reig. 1973. The early fossil record of frogs: a review of the evidence. Pp. 11-63 In J. L. Vial (Ed.), Evolutionary Biology of the Anurans: Contemporary Research on Major Problems. University of Missouri Press, Columbia.

Ford, L. S., and D. C. Cannatella. 1993. The major clades of frogs. Herp. Monogr. 7:94-117.

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 Notobatrachus degiustoi. 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. 1995. Notobatrachus degiustoi. Version 01 January 1995 (under construction). http://tolweb.org/Notobatrachus_degiustoi/16965/1995.01.01 in The Tree of Life Web Project, http://tolweb.org/

edit this page
close box

This page is a Tree of Life Leaf Page.

Each ToL leaf page provides a synopsis of the characteristics of a group of organisms representing a leaf at the tip of the Tree of Life. The major distinction between a leaf and a branch of the Tree of Life is that a leaf cannot generally be further subdivided into 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

Notobatrachus degiustoi

Page Content

articles & notes



Explore Other Groups

random page

  go to the Tree of Life home page