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.
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.close box
Tree from Johnson and Lanyon (1999; Figure 4). Placement of Agelaius assimilis is based on an as yet unpublished study by Barker, Vandergon, and Lanyon.
This clade is the subject of an NSF funded "Assembling the Tree of Life" grant (DEB-0316092) to Keith Barker (University of Minnesota), Kevin Burns (San Diego State University), John Klicka (University of Nevada-Las Vegas), Scott Lanyon (University of Minnesota), and Irby Lovette (Cornell University). Our goal is to sequence multiple genes for every species of "nine-primaried oscine" and to construct a robust phylogeny from these data. This page will be updated once this research has been completed.
Johnson, K.P. and S.M. Lanyon 1999. Molecular systematics of the grackles and allies, and the effect of additional sequence (CYT-b and ND2). Auk 116:759-768.
Lanyon, S.M. 1994. Polyphyly of the blackbird genus Agelaius and the importance of assumptions of monophyly in comparative studies. Evolution 48:679-693.
University of Minnesota, St. Paul, Minnesota, USA
Correspondence regarding this page should be directed to Scott Lanyon at
Page copyright © 2006 Scott Lanyon
Page: Tree of Life Agelaius. Authored by Scott Lanyon. 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.
- First online 13 October 2006
- Content changed 13 October 2006
Citing this page:
Lanyon, Scott. 2006. Agelaius. Version 13 October 2006 (temporary). http://tolweb.org/Agelaius/67409/2006.10.13 in The Tree of Life Web Project, http://tolweb.org/