Three new corticioid species (Basidiomycota) from the Caucasus regionMasoomeh Ghobad-Nejhad & Eugene Yurchenko ................................................5Aleurodiscus indicus (Agaricomycetes) sp. nov. from IndiaLeif. Ryvarden, S.K. Sanyal, & Gurpaul Dhingra ...............................................14A note on the genus XylobolusP. Karst.Leif Ryvarden ......................................................................................................17A note on the genus StereopsisD. A. ReidLeif Ryvarden ......................................................................................................25Studies in neotropical polypores 31. The genus Oxyporusin South and Central America and new records of further fungi from PanamaTina Antje Hofmann & Leif Ryvarden ................................................................27Studies in neotropical polypores 32. Some new species from Costa RicaLeif Ryvarden ......................................................................................................33Studies in neotropical polypores 33. Cerrena gilbertsoniinov. sp.Leif Ryvarden ......................................................................................................44Studies in neotropical polypores 34. A preliminary checklist from Galapagos IslandsLeif Ryvarden ......................................................................................................46 Nomenclaturial novelties proposed in this volume:Athelidium caucasicumYurchenko ........................................................................6Peniophora metuloidea Ghobad-Nejhad & Yurchenko .............................................8Phlebia parva Ghobad-Nejhad ....................................10Aleurodiscus indicus Ryvarden, S.K. Sanyal, & Dhingra 14Stereopsis albida Ryvarden ..................................................................................25Oxyporus acystidiatusT.A. Hofm. & Ryvarden .................................................28 Dichomitus costaricensis Ryvarden .....................................................................33 Sarcoporia neotropica Ryvarden .........................................................................35 Trametes brunnea Ryvarden ................................................................................36 Trichaptum album Ryvarden ................................................................................39 Tyromyces album Ryvarden .................................................................................41 Cerrena gilbertsonii Ryvarden.............................................................................45 Inonotus galapagosensis Ryvarden .....................................................................48 Trametes imbricata Ryvarden ..............................................................................49