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Re: PDF-request: Original description of Lagosuchus and/or Marasuchus

From: David Marjanovic <david.marjanovic@gmx.at>

>>"Autapomorphy" just means "character state present in the first member
>>of a clade and absent in its last ancestor". Every parsimony-informative
>>character, thus, has a state that is autapomorphic of a clade.

This is a much different definition of Autapomorphy than I am used to,
which is a character state that is unique to a terminal taxon and thus
uninformative in a phylogentic analysis.  I believe this is the definition
that David Peter's is also following when it describes them as "weird".

I would think that the term apomorphy is what you described above.

Bill Parker
Vertebrate Paleontologist
Division of Resource Management
Petrified Forest National Park
P.O. Box 2217
1 Park Road
Petrified Forest, AZ 86028
(928) 524-6228 x262