Phylogenetic relationships of Hapalopilus and related genera inferred frommitochondrial small subunit ribosomal DNA sequences

To elucidate the evolution of Hapalopilus and related genera, partial mitoc hondrial small subunit ribosomal DNAs of 13 species were sequenced and phyl ogenetically analyzed. Both neighbor-joining and parsimony trees showed tha t species with polyporic acid have evolved several times and that Ha palopi lus, Lopharia, Porostereum and Phanerochaete were all polyphyletic. The mai n Hapalopilus group consisted of four species of Hapalopilus and Porostereu m friesii, while Hapalopilus salmonicolor (= Sarcoporia salmonicolor) came out close to the species of Irpex and Oxyporus and proved to be a distinct taxon.