van Geel 1978: spores three-septate, slightly curved, constricted at the middle septum, (29)34-38(47) x 10-13 μm, exclusive of the 1-2(5) μm thick, undulating epispore, which is attached to the spore wall at regular intervals.
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.