Hystrichosphaeridium pseudorecurvatum

"pseudorecurvatum" Morgenroth, 1966a, p.30–31, pl.8, figs.5–6.  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: Hystrichosphaeridium