Chiang Mai Journal of Science

 Inonotus andersonii, originally described from America, but though to be distributed worldwide, and I. krawtzewii, only know from the type locality – Russian Far East, are similar in morphology and were considered as conspecifis. To test this view and to check their distribution, we sampled collections of so-called I. krawtzewii from Asia, America and Europe, and compared them to the type specimens of I. krawtzewii . After a combination of phylogenetic analysis based on ITS and tef1a sequences, and morphological examination, we found that I. andersonii and I. krawtzewii are differents species, and Asian and European collections previously identified as I. andersonii represent I. krawtzewii and not I. andersonii. Inonotus andersonii differs from I. krawtzewii by both ITS and tef1a sequences, and by the presence of hyphoid setate. Innotus krawtzewii is redescribed according to the lectotype.