Dark-spored species of Agaricineae from Republic of Sao Tome and Principe, West Africa

Eighteen dark-spored species representing members of the lineages Bolbitiaceae (Conocybe-1), Crepidotaceae (Crepidotus-2, Simocybe-1), Gymnopileae (Gymnopilus-2), Hymenogastraceae (Galerina-2), Psathyrellaceae (Coprinellus-2, Coprinopsis-2, Psathyrella-3), and Strophariaceae (Deconica-2, Hypholoma-1) are reported from the islands of Sao Tome and Principe. Of these species, 4 are new species (Crepidotus kangoliformis, Coprinopsis afronivea, Psathyrella cacao, Psathyrella oboensis) and 11 are first reports for the Republic. New combinations are proposed for Deconica overeemii (Bas. Psilocybe overeemii) and Deconica protea (Bas. Agaricus proteus). Comprehensive descriptions, color photographs, ITS sequences and comparisons with allied taxa are provided.