Protoperidinium subgenus Protoperidinium section Trinovantedinium Appendix B
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"PROTOPERIDINIUM subgenus PROTOPERIDINIUM section TRINOVANTEDINIUM" (Reid, 1977, p.436–437) Harland, 1982, p.397. Combination not validly published: basionym not fully referenced. NOW Trinovantedinium. Originally (and now) Trinovantedinium, subsequently Protoperidinium subgenus Protoperidinium section Trinovantedinium (combination not validly published). Type: Reid, 1977, pl.1, figs.6–8, as Trinovantedinium capitatum.