Fig. 1.

Anthracoidea disciformis (H s.n. — holotype). A. The holotype material. B–C. Enlarged sorus visible from both sides of inflorescence respectively. D–E. Spores in LM, median and superficial views respectively. F–I. Spores with prominent hyaline mucilaginous sheath on the flattened sides. Note small papillae on spore surface indicated by arrows on picture F. J–K. Spores in SEM. Note remnants of mucilaginous sheath on surface of spores illustrated on picture J and in central part of spore illustrated on picture K. L. Ornamentation of spore in SEM. Bars: A–C = 5 mm, D-J = 10 µm, K = 5 µm, L = 3 µm.