The stem and crown group concept. Revised from the original to clarify that the stem group does NOT include the basal node (ancestor) of the crown group.
This is a retouched picture, which means that it has been digitally altered from its original version. Modifications: Revised diagram as per description.. The original can be viewed here: Stemgroups.jpg: . Modifications made by Peter coxhead.
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Original upload log
This image is a derivative work of the following images:
File:Stemgroups.jpg licensed with Cc-by-sa-3.0-migrated-with-disclaimers, GFDL-en
2008-09-22T12:40:45Z BartekChom 1613x1141 (149985 Bytes) {{Information |Description=The stem and crown group concept. The two pink groups represent a pair of crown groups, the last common node of which is the basal node. Terminology is from Craske, A. J. and Jefferies, R. P. S. (1
{{Information |Description=The stem and crown group concept. Revised from the original to clarify that the stem group does NOT include the basal node (ancestor) of the crown group. |Source=*File:Stemgroups.jpg |Date=2010-12-04 09:14 (UTC) |Author=*