ABSTRACT: Acumispora verruculosa sp. nov. and Pleurophragmium aquaticum sp. nov. on decaying leaves of an unidentified plant and wood, respectively, submerged in a stream at the “Los Tuxtlas” rainforest, Veracruz, Mexico, are herein described and illustrated. The former is distinguished by obclavate, rostrate, 2-septate, verruculose, very pale brown conidia and the latter is characterized by navicular, fusiform to sub-clavate, 3-septate, smooth, brown and pale brown conidia which are paler at each end and at the septa. A key for Acumispora is provided. Pleurophragmium miniumbonatum comb. nov. is proposed.

KEYWORDS: freshwater fungi, hyphomycetes, systematics, tropical fungi