Microthecium ciliatum Udagawa & Takada, Trans. Mycol. Soc. Japan 15: 23. 1974.

≡ Pteridiosperma ciliatum (Udagawa & Y. Takada) J.C. Krug & Jeng, Mycotaxon 10: 45. 1979.

Notes.

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. Microthecium lenticulare 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. Microthecium foveolatum 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.