Operculodinium pseudorecurvatum

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"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