Repetobasidium azoricum (Basidiomycotina, Sistotremataceae), a new species from Azores Islands I. Melo, M Dueñas M. & M. T. TelleriaSistotrema aciferum: a new, long-spored, corticioid fungus from EnglandP. Roberts & A. HenriciSome Corticioid fungi (Basidiomycotina) from EcuadorK. Hjortstam, K. L. & RyvardenCorticioid species (Basidiomycotina, Aphyllophorales) from Colombia IV K. Hjortstam. & L. RyvardenPolyporus elongoporus (Aphyllophorales, Basidiomycota)sp. nov. E. R. Drechsler-Santos, L. Ryvarden, F. Wartchow F.& M. A. Q. CavalcantiFomitopsis ochracea nova species, J. Stokland & L. RyvardenDichomitus efibulatus nova speciesA. Martyn Ainsworth & L. RyvardenBiodiversity of Sardinian Aphyllophoraceous fungiA. Bernicchia, L Arras, A. Piga, A. & L. Ryvarden Nomenclaturial novelties proposed in this volume:New genus:Brevicellopsis Hjortstam & Ryvarden,Radulodontia Hjortstam & Ryvarden New Species:Brevicellicium allantosporum Hjortstam & Ryvarden,The genus Grammothelopsis (Aphyllophorales, Basidiomycota) G. Robledo & L.Ryvarden 7 Ceriporiopsis herbicola (Polyporaceae, Basidiomycota) R. A. Fortey & L. Ryvarden 13 Studies in Neotropical polypores 22. Additional new and rare species from Guyana. M. C. Aime, L. Ryvarden & T. W. Henkel 15 Studies in neotropical polypores 23. New and interesting wood-inhabiting fungi from Belize. L. Ryvarden 32 Studies in Neotropical polypores 24New and interesting species from Costa Rica. M. Mata & L. Ryvarden 51 Studies in corticioid fungi from Venezuela III (Basidiomycotina, Aphyllophorales). K. Hjortstam & L. Ryvarden 56 Nomenclaturial novelties proposed in this volume: New genera:Atraporiella Ryvarden 38Ceraceopsis Hjortstam & Ryvarden 62New genera:Atraporiella Ryvarden 38Ceraceopsis Hjortstam & Ryvarden 62 New Species:Grammothelopsis neotropica Robledo & Ryvarden 10Ceriporiopsis herbicola Fortey & Ryvarden 14Amauroderma flabellatum, Aime & Ryvarden 16Ceriporia subspissa, Aime & Ryvarden 19Coltricia fibrosa, Aime & Ryvarden 21Dichomitus grandisporus, Aime & Ryvarden 24Fomitopsis minuta, Aime & Ryvarden 26Wrightoporia micropora, Aime & Ryvarden 28Coltricia cylindrospora Ryvarden 35Anomoporia neotropica Ryvarden 38Atraporiella neotropica Ryvarden 38Dichomitus cylindrosporus Ryvarden 40Dichomitus perennis Ryvarden 43Junghuhnia chlamydospora Ryvarden 45Oxyporus lacerus Ryvarden 47Rubroporus aurantiaca Ryvarden. 51Serpula costaricensis Mata & Ryvarden 54Polyporoletus neotropicus Mata & Ryvarden 54Hyphoderma acutatum, Hjortstam & Ryvarden 74Phlebiella palmicola, Hjortstam & Ryvarden 83Radulodon revolubilis, Hjortstam & Ryvarden 88Xylodon tenellus Hjortstam & Ryvarden 103 New combinationsDichomitus mexican (Ryvarden) Ryvarden 42Coriolopsis hostmannii (Berk.) Ryvarden 39Athelopsis bispora (Boidin & Gilles) Hjortstam & Ryvarden 57Gloeopeniophorella sacrata (G. Cunn.) Hjortstam & Ryvarden 72Gloeopeniophorella singulare (Boidin & al.) Hjortstam & Ryvarden 74Tofispora scaberula (Hjortstam & Ryvarden) Hjortstam & Ryvarden 93 Xylodon australis (Berk.) Hjortstam & Ryvarden 98Xylodon bugellensis (Ces.) Hjortstam & Ryvarden 99Xylodon pruni (Lasch) Hjortstam & Ryvarden 100Xylondon stratosus 101