"Classification is done with TNT" which "stands for "Tree analysis using New Technology". It is a program for phylogenetic analysis under parsimony (with very fast tree-searching algorithms;"[1]. Interesting classification problem.<p>[1] <a href="http://www.zmuc.dk/public/phylogeny/tnt/" rel="nofollow">http://www.zmuc.dk/public/phylogeny/tnt/</a>