Kuhry (1985): Fungal spores, mostly biseptate, sometimes 3-4 septate, 22-28 µm long, 13-17 µm broad in the apical cell. The latter is broader than in Type 11 (Van Geel, 1978). Top cells dark brown to black, basal cell hyaline with a truncate end corresponding with the place of mycelial attachment. Septa with a <1 µm wide pore.
Kuhry (1985) Transgressions of a raised bog across a coverstand ridge originally covered with an oak-lime forest. Rev. Palaeobot. Palynol. 44:313-353.