ABSTRACT: This taxonomical research was made in several habitats of three states of northeastern Brazil. Seven species of Tulostoma were found: T. cretaceum, T. cyclophorum, T. exasperatum, T. excentricum, T. fimbriatum, T. obesum and T. xerophilum. Five of these species constitute new records from Brazil and six are reported for the first time from the neotropics.

KEYWORDS: Agaricomycetidae, taxonomy, biodiversity