Genus accepted as circumscribed by Seifert (1985), but including teleomorphic taxa with the following general characteristics: Stromata firm but pliant, white to yellow or brown, often multifurcating or with several stipes representing several cycles of growth; rhizomorphs present or absent. Perithecia immersed in an apical or subapical pulvinate cushion, or superficial, scattered to gregarious, often concentrated on the upper stroma but the stroma tip bare. Asci long, ascospores forming many small partspores of nearly equal length. Hosts include nymphs of Cicadidae (Hemiptera), Neuroptera and larvae of Coleoptera. Type: Polycephalomyces formosus Kobayasi Anamorphic states: Acremonium-like, Hirsutella-like, Polycephalomyces