van Geel 1978: Loricae about 145 μm long, greatest width about 75 μm. "Mouth" about 18 μm in diameter.
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.