Hystrichosphaeridium trispiculare Jagielska, 1962

This taxon represents acritarchs. Fensome et al., 1990, retained it in Hystrichosphaeridium pending a more appropriate generic assignment. This is probably an acritarch species.

Holotype: Jagielska, 1962, pl.5, fig.5
Age: Ordovician (Arenig-Caradoc)