Systematophora penicillata (Ehrenberg, 1843) Sarjeant, 1980

Originally Xanthidium penicillatum (acritarch), subsequently Hystrichosphaera penicillata (combination not validly published), thirdly Hystrichosphaeridium penicillatum, fourthly Ovum hispidum subsp. penicillatum (combination not validly published; acritarch), fifthly Hystrichosphaeridium? penicillatum, sixthly (and now) Systematophora penicillata.
Taxonomic junior synonym: Systematophora fasciculigera, according to Sarjeant (1980a, p.282).
The name Systematophora penicillata was not validly published in Ehrenberg (1843b) since neither description nor illustration was provided. The validity/authorship of this name may need to be reconsidered as it appears that Ehrenberg (1854) did not provide a description.

Holotype: Ehrenberg, 1854, pl.37, fig.8.3
Age: Late Oxfordian