This survey presents the first poroid Hymenochaetaceae checklist from Parque Estadual da Serra do Mar, São Paulo state, Brazil, where 24 species are presented. Fulvifomes melleoporus, Fuscoporia chrysea, Fuscoporia rhabarbarina, Inonotus linteus, Inonotus portoricensis, Phellinus grenadensis, Phellinus roseocinereus and Phellinus undulatus are cited for São Paulo state for the first time, and Fulvifomes glaucescens is a new record to Brazil. Full description of the new record for Brazil, comments on the new records for São Paulo state, photos of the new records, as well as an identification key for the 24 confirmed species found in the park are presented. [ABSTRACT FROM AUTHOR]