Protoperidinium subgenus Protoperidinium section Quinquecuspis Appendix B

"PROTOPERIDINIUM subgenus PROTOPERIDINIUM section QUINQUECUSPIS" (Harland, 1977b, p.106) Harland, 1982, p.396–397.  Emendation: Harland, 1982, p.396–397, as Protoperidinium subgenus Protoperidinium section Quinquecuspis.  Combination not validly published: basionym not fully referenced.  NOW Quinquecuspis.  Originally (and now) Quinquecuspis, subsequently Protoperidinium subgenus Protoperidinium section Quinquecuspis (combination not validly published).  Taxonomic junior synonym: Lejeunecysta, by implication in Matsuoka (1987, p.57), who incorrectly considered Lejeunecysta to be the senior name — however, this synonymy has not been generally followed.  Type: Reid, 1977, pl.26, figs.10–11, as Trinovantedinium concretum.