Conidial fungi from the semi-arid Caatinga biome of Brazil. New species and records for Thozetella

As a result of an investigation of microfungi in northeastern Brazil, the hyphomycete Thozetella submersa sp. nov. is described from submerged wood. Its diagnostic features are the smooth, elliptic-fusiform, obclavate to rarely obovoid to obclavate, slightly curved, sometimes corniculate at the ends, microawns. T. boonjiensis and T. gigantea are recorded for the first time for the American continent. A key to all described species is included. A synopsis of drawings of microawns (most based on original papers) is provided for all Thozetella species.