Operculodinium centrocarpum
*centrocarpum (Deflandre and Cookson, 1955, p.272-273, pl.8, figs.3-4) Wall, 1967, p.111. Holotype: Deflandre and Cookson, 1955, pl.8, figs.3-4; Matsuoka et al., 1997, pl.1, figs.1-6. Originally Hystrichosphaeridium centrocarpum, subsequently Baltisphaeridium centrocarpum (Appendix A), 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) - however, Membranilarnacia delicata is now considered to be a taxonomic junior synonym of Hystrichosphaeridium (now Polysphaeridium) zoharyi. 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). Head in Head and Wrenn (1992, p.24) considered this species to be the possible taxonomic senior synonym of Operculodinium wallii. See also Hystrichosphaeridium westii. Age: Miocene.
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