van Geel 1978: ascospores curved, 44-50 x 8-10 μm, three-septate, constricted at the middle septum, middle cells darker than the end cells. Groups of eight (2 x 4) spores were repeatedly found in close proximity, in the position they held in the (non-fossilised) ascus.
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.