Microthecium fimbriatum (Rostr.) Y. Marin, Stchigel, Guarro & Cano comb. nov.

Sphaeroderma fimbriatum Rostr., Oest. Grönl . Svampe: 25. 1894. [Basionym]

≡ Melanospora fimbriata (Rostr.) Petch, Trans. Br. mycol. Soc. 21: 253. 1938.

Notes.

Microthecium fimbriatum produces ostiolate ascomata, and citriform to plataniform, smooth-walled ascospores with a strongly apiculate and tuberculate germ pore at each end. Although the ascomata was described as small and reddish in the protologue, the strain included in this study (NBRC 8523) shows larger (250-380 µm diam.), orange-brown ascomata. Moreover, our isolate produces bulbils. For morphological comparison see Notes of Mi. brevirostrum .