The genus Inonotus s.l. (Hymenochaetales: Agaricomycetes) in Mexico

The genus Inonotus is considered polyphyletic of which the recognized genera are Inocutis, Inonotus s. str., Inonotopsis, Mesularia, Onnia, and Pseudoinonotus. Twenty-four species of the genus Inonotus s.l. were studied in this work based upon the examination of 304 specimens deposited on the Herbaria ENCB, MEXU, BCMEX, IBUG, XAL, NY, BPI, and ARIZ. In Mexico, we found 24 species, corresponding to 5 of the 6 genera segregated. Four of these species are new records: Inocutis rheades (Pers.) Fiasson and Niemela, Inonotus arizonicus Gilb., I. porrectus Murrill, and I. quercustris M. Blackw. and Gilb. Furthermore, I. rickii (Pat.). A. Reid is reported as a teleomorphic state for the rst time in North America. A key to identify the Mexican species of Inonotus s.l. is presented.