This difference of form underlies the current disagreement on Panbiog-L
http://groups.google.com/group/panbiog/among Dr. Nelson (of Cladistic FAME) and other panbiogeographers (Craw,Heads,Henderson,Calvalcanti etc )and myself!
Here is my link to the site
http://axiompanbiog.com/panbioglnks.aspx
Sincerely,
Brad McFall
Oh, yea, I show how to get a "web" from Darwin's "tree" here
http://axiompanbiog.com/intro.aspx
Edited by Brad McFall, : additional link