Additions to the Brazilian Erysiphaceae: Ovulariopsis durantae sp. nov. and Streptopodium tabebuiae sp. nov

Abstract

Two new species of anamorphic powdery mildew from Brazil are described: Ovulariopsis durantae on Duranta erecta (Verbenaceae) and Streptopodium tabebuiae on Tabebuia serratifolia (Bignoniacaeae). Ovulariopsis durantae is compared with and discriminated from other Phyllactinia anamorphs with sinuous to spirally twisted conidiophore foot-cells. The outer wall surface patterns of its conidia are different to those presented as typical for subfamily Phyllactinioideae. Streptopodium tabebuiae can be easily discriminated from the five species of Pleochaeta known to have Streptopodium anamorphs and also from the two strictly anamorphic species of Streptopodium by the combination of two features: very long conidiophores and straight conidiophore foot-cells.