Hystrichokolpoma reductum
From dinoflaj3
"reductum" Zevenboom and Santarelli in Zevenboom, 1995, p.138, pl.4, figs.7–12. Holotype: Zevenboom, 1995, pl.4, figs.7–9. Name not validly published: considered a manuscript name. Age: latest early Miocene.