Hystrichosphaeridium siluricum
From dinoflaj3
siluricum Pöthe de Baldis, 1981, p.243–244, pl.4, fig.2. Holotype: Pöthe de Baldis, 1981, pl.4, fig.2. This is probably an acritarch species. Age: Silurian (Ludlow).
Parent: Hystrichosphaeridium