Van Geel 1978: Ascospores fusiform, dark brown, non-septate, about 35 X 8 μm; wall thickened at the ends, one side flattened and bearing a longitudinal germ slit.
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.