Baltisphaeridium vestitum, (Deflandre, 1938), Sarjeant, 1960

Now Systematophora. Originally Hystrichosphaeridium subsequently Baltisphaeridium, thirdly Surculosphaeridium, fourthly Surculosphaeridium, fifthly Multiplicisphaeridium (an acritarch genus), sixthly (and now) Systematophora. At the time of the transfer, Sarjeant, 1960 emended the diagnosis of this species.

Holotype: Deflandre, 1938, pl.11, fig.5
Age: Oxfordian