Protoperidinium subgenus Archaeperidinium section Fuscusasphaeridium Appendix B
From dinoflaj2
PROTOPERIDINIUM subgenus ARCHAEPERIDINIUM section FUSCUSASPHAERIDIUM Harland, 1982, p.395. Modern section defined from the motile stage. Harland (1982, p.372) included fossilizable cysts in this taxon.