van Geel 1978: Fruit-bodies applanate, 65-125 µm in diameter, darkly pigmented, with one or two openings. Wall composed of numerous radiating files of regular rectangular cells, 2-5 × 1.5-3.0 µm. Cells around the ostiole dark, thickwalled, 1.5-2.0 µm wide hyphae often arising from the dark central cells. No basal layer observed.
van Geel B (1978) A palaeoecological study of Holocene peat bog sections in Germany and the Netherlands, based on the analysis of pollen, spores and macro- and microscopic remains of fungi, algae cormophytes and anymals. Rev. Palaeobot. Palynol. 25:1-120.