Xu and Song (1999)described a Jiaozhou popula based on Parauronema having a very similar morphology to Uronema and the only exception being atwo-rowed M1 (vs. one-rowed). Considering P. acutum and P.longum were reported also with two longitudinal rows in M1,more evidence is needed to validate whether Parauronema is a junior synonym of Uronema.