Cleistosphaeridium centrocarpum, (Deflandre and Cookson, 1955), Jiabo, 1978

NOW Operculodinium centrocarpum. Originally Hystrichosphaeridium centrocarpum, subsequently Baltisphaeridium centrocarpum, thirdly Cordosphaeridium centrocarpum, fourthly Cordosphaeridium tiara subsp. centrocarpum, fifthly (and now) Operculodinium centrocarpum, sixthly Cordosphaeridium microtriainum subsp. centrocarpum, seventhly Cleistosphaeridium centrocarpum. Lentin and Williams (1973, p.102) retained this taxon as Operculodinium centrocarpum.
Taxonomic junior synonyms: Operculodinium? echigoense, according to Matsuoka et al. (1997, p.22); Membranilarnacia delicata, according to Jain (1980, p.140).
Motile equivalent: Peridinium (now Protoceratium) reticulatum Claparède and Lachmann, 1859 (as Gonyaulax grindleyi Reinecke, 1967), according to Wall and Dale (1966, p.1025-1026) - however, see Head (1996b, p.1211).

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