Micrhystridium fucosum Valensi, 1955

Now Dapsilidinium?. Originally Micrhystridium, subsequently
Hystrichosphaeridium, thirdly Polysphaeridium?, fourthly (and now) Dapsilidinium?.
Tax. sr. synonym of Hystrichosphaeridium tubiferum ssp. brevispinum Davey and Williams, 1966, according to Below, 1982; however, Lentin and Williams, 1985 retained Hystrichosphaeridium tubiferum ssp. brevispinum as a separate taxon. Tax. sr. synonym of Litosphaeridium arundum (Eisenack and Cookson, 1960) Davey, 1979, according to Below, 1982; however, Lentin and Williams, 1985 retained Litosphaeridium arundum as a separate species.
Holotype: Valensi, 1955, text-fig.2b
Age: Late Cretaceous