Exserohilum K.J. Leonard & Suggs, Mycologia 66(2): 289 (1974)
= Setosphaeria K.J. Leonard & Suggs, Mycologia 66(2): 294 (1974).
= Luttrellia Khokhr. & Gornostaĭ, in Gornostaĭ in Azbukina et al. (Eds), Vodorosli, Griby i Mkhi Dal’nego Vostoka [Algae, Fungi and Mosses of the Soviet Far-East] (Vladivostok): 80 (1978)
Saprobic or pathogenic on leaves or wood. Sexual morph: Ascomata superficial, globose or ellipsoid with or without a neck. Ostiole surrounded by simple, short, rigid, brown hairs, similar hairs scattered over surface of upper part of ascomata. Peridium coriaceous-carbonaceous, pseudoparenchymous. Pseudoparaphyses filamentous. Asci 1–8-spored, bitunicate, cylindrical to cylindrical-clavate. Ascospores phragmosporous, hyaline, fusoid, trans-septate, surrounded by a mucilaginous sheath. Asexual morph: Conidiophores cylindrical, simple, olivaceous-brown, upwardly geniculate. Conidia porogenous, acrogenous and pseudopleurogenous, subclylindrical to fusoid or broad obclavate-rostrate, pseudoseptate, olivaceous to brown, hilum protruding from basal cell, germinating by bipolar germ tubes.