This species is characterized by non-ostiolate ascomata and ellipsoidal to fusiform ascospores ornamented with wing-like appendages and wrinkles, and the production of a phialidic asexual morph and bulbils. Microtheciumlenticulare and Mi.foveolatum also present ascospores with wing-like appendages, but these are pitted and not wrinkled (as in Mi.ciliatum), and neither species produces bulbils. Microtheciumfoveolatum and Mi.ciliatum are characterized by non-ostiolate ascomata and the production of a phialidic asexual morph, whereas Mi.lenticulare has ostiolate ascomata and lacks an asexual morph.