Mycosphaerellalimneticaa new species in Pezizomycotina, Dothideomycetes, Capnodials, Mycospharellaceae, encountredondecorticatedsubmerged woody debris from a freshwater river (Aner, Maharashtra) in India, is described and illustrated. The characteristic features of the new species are: Ascomata: subglobose, semi-immersed, black, papillate, ostiolate with conical beak. Peridium: thick-walled, composed of cells of texturaangularis. Pseudoparaphyses: absent. Asci: fissitunicate, 8-spored, 2-3 seriate, clavate, 90-120 x 14-20 m, lacking stalk, rounded at the apex. Ascospores: one-septate, septum supra-median, upper cell broader and shorter than basal cell, clavate to cylindrical, multigattulate, hyalne, becoming golden colored at maturity, with cylindrical gelatinous sheath which constricted at the septum, becoming elongated and diffuse in water.