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.
Temporary Page

Hemichordata

Acorn worms and pterobranchs

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
Containing group: Deuterostomia

Other Names for Hemichordata

References

Benito, J. and F. Pardos. 1997. Hemichordata. Pages 15-101 in Microscopic Anatomy of Invertebrates, Vol. 15. F. W. Harrison, ed. Wiley Liss, New York.  

Cameron, C.B., J. R. Garey, and B. J. Swalla. 2000. Evolution of the chordate body plan: New insights from phylogenetic analyses of deuterostome phyla.  Proceedings of the National Academy of Sciences USA 97:4469-4474.

Castresana, J., G. Feldmaier-Fuchs, S. Yokobori, N. Satoh, and S. Pääbo. 1998. The mitochondrial genome of the hemichordate Balanoglossus carnosus and the evolution of deuterostome mitochondria. Genetics 150:1115-1123.

Halanych, K. M. 1995. The phylogenetic position of the pterobranch hemichordates based on 18S rDNA sequence data. Molecular Phylogenetics and Evolution 4:72-76.

Henry, J. Q., K. Tagawa and M. Q. Martindale. 2001. Deuterostome evolution: early development in the enteropneust hemichordate, Ptychodera flava. Evolution and Development 3:375-390.

Winchell, C. J., J. Sullivan, C. B. Cameron, B. J. Swalla, and J. Mallatt. 2002. Evaluating hypotheses of deuterostome phylogeny and chordate evolution with new LSU and SSU ribosomal DNA data. Molecular Biology and Evolution 19:762-776.

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
Scientific Name Saccoglossus kowalevskii
Creator David Remsen
Copyright © 1995 Marine Biological Laboratory, Woods Hole
About This Page

Page: Tree of Life Hemichordata. Acorn worms and pterobranchs. The TEXT of this page is licensed under the Creative Commons Attribution-NonCommercial 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. 1995. Hemichordata. Acorn worms and pterobranchs. Version 01 January 1995 (temporary). http://tolweb.org/Hemichordata/2498/1995.01.01 in The Tree of Life Web Project, http://tolweb.org/

edit this page
close box

This page is a Tree of Life 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

Hemichordata

Page Content

articles & notes

collections

people

Explore Other Groups

random page

  go to the Tree of Life home page
top