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New species of Stropharia from Araucaria angustifolia forests of southern Brazil

     ¹ Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, 93280130, Brazil
² Programa de Pós-graduaçóo em Botnica, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves, 9500, Agronomia, Porto Alegre, Rio Grande do Sul, 91501-970, Brazil
³ Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brasil

Two new agaric species of Stropharia are described from Araucaria angustifolia (Brazilian pine) forests of southern Brazil. Stropharia agaricoides presents Agaricus-like basidiomes, small basidiospores (5-7 µ m long) and pyriform cheilochrysocystidia. Stropharia venusta is characterized by the reddish to pinkish pileus, large basidiospores (12-15 µ m long) and subclavate cheiloleptocystidia.

Key words: acanthocytes, Agaricales, Strophariaceae, Neotropical mycobiota, taxonomy