Abstract
An unusual loculoascomycete with superficial, setose ascomata, two-spored, fissitunicate asci and large, dictyosporous ascospores surrounded by a gelatinous sheath is described in the genus Boerlagiomyces (Tubeufiaceae, Pleosporales). This species is known only from rivers in lower latitudes in North America and may be a warm water species.