Genus
Protosphaeridium Timofeev, 1966
Selection of related publications
Jankauskas, T., Vaitiekuniene, G. K. 1972. Silurian Acritarcha from the Baltic area. Paleontologicheski Zhurnal 1972, 2, 113-121.
List of species
1. Protosphaeridium gracilis Jankauskas et Vaitiekuniene, 1972 | upper Silurian
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Classification