Operculodinium pseudorecurvatum
From dinoflaj2
"pseudorecurvatum" (Morgenroth, 1966a, p.30-31, pl.8, figs.5-6) Stover and Evitt, 1978, p.179. Holotype: Morgenroth, 1966a, pl.8, fig.5. NOW Melitasphaeridium. Originally Hystrichosphaeridium, subsequently Operculodinium, thirdly (and now) Melitasphaeridium. Taxonomic junior synonym: Hystrichosphaeridium sheppeyense, according to Stover and Evitt (1978, p.179). Age: Early Eocene.
Parent: Operculodinium