::We should be constrained by Wikipedia policy above regarding peer-reviewed articles. 

 :I've only found two peer-reviewed articles; One is by MWC guy, who seems to me have vested interest in topic apart from the article.  

 :The other is by several outsiders, and is severely critical of MWC guy's methods and conclusions. 
 :I'd definitely not oppose a separate article on topic to include all the various theories & political factors & interest groups. Politics, however, may be out of place in a simple listing of species.