Hystrichosphaeridium borracherosum (Cramer, 1964) Andreeva, 1973

Combination not validly published since Andreeva, 1973, did not fully reference the basionym.
NOW Petaloferidium (Appendix A). Originally Baltisphaeridium (Appendix A), subsequently Multiplicisphaeridium (Appendix A), thirdly Hystrichosphaeridium (combination not validly published), fourthly (and now) Petaloferidium (Appendix A).
Andreeva, 1973, implied that the basionym for this species is Hystrichosphaeridium borracherosum.

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

Original description (Cramer, 1964):
Ballisphaeridium borracherosum n. sp. Plate I: 11*; text-figure 16: 6.
Dimensions. Øi = about 30 µm; Øt = about 40 µm
Central body roughly spherical; central body and processes hollow with a uniform wall that is psilate at 1200 x magnification and that is moderately transparent. The numerous short processes are irregularly branched. About 10 to 20 processes in optical section.
Frequency and provenance. Rare in the San Pedro Formation. Holotype from 0001, section Santa Lucía de Gordon, NW-Spain.
Known stratigraphical range. San Pedro Formation, Ludlovian, NW-Spain