Baltisphaeridium centrocarpum, (Deflandre and Cookson, 1955), Gerlach, 1961

Now Operculodinium centrocarpum. Originally Hystrichosphaeridium centrocarpum, subsequently Baltisphaeridium centrocarpum, thirdly Cordosphaeridium centrocarpum, fourthly Cordosphaeridium tiara ssp. centrocarpum, fifthly (and now) Operculodinium centrocarpum, sixthly Cordosphaeridium microtriainum ssp. centrocarpum, seventhly Cleistosphaeridium centrocarpum.
Tax. sr. synonym of Membranilarnacia delicata Kar, 1979, according to Jain, 1980.

Holotype: Deflandre and Cookson, 1955, pl.8, figs.3-4
Age: Miocene