Palaeocystodinium ventricosum

"ventricosum" Zevenboom and Santarelli in Zevenboom, 1995, p.161, pl.9, figs.14–15. Holotype: Zevenboom, 1995, pl.9, figs.14–15. Name not validly published: considered a manuscript name. Age: latest early Miocene–middle Miocene.