Petaloferidium borracherosum (Cramer, 1964, p.289, pl.1, fig.11; text-fig.16, no.6) Sarjeant and Vavrdova, 1997, p.29.

Originally Baltisphaeridium (Acritarch), subsequently Multiplicisphaeridium (Acritarch), thirdly Hystrichosphaeridium (combination not validly published), fourthly (and now) Petaloferidium.

Holotype: Cramer, 1964, pl.1, fig.11.
Age: Silurian (Ludlow).