ABSTRACT: A new species, Antrodia minuta, is described. It belongs to the Antrodia heteromorpha complex and is closely related to the East-Asian A. leucaena. Antrodia minuta is characterized by small-sized, mostly pileate basidiocarps, a dimitic hyphal structure with solid skeletal hyphae, and cylindrical basidiospores; its distribution is hemiboreal. Taxonomy of Antrodia malicola, A. sitchensis and Cartilosoma ramentaceum is briefly discussed. A new combination, Fibroporia pseudorennyi, is proposed. Conidial state is first described for F. gossypium.

KEYWORDS: polypores, wood-inhabiting fungi