Ceratiopsis diebelii subsp. rigida

"subsp. rigida" (May, 1980, p.75-76, pl.8, figs.9-10,15) Lentin and Williams, 1981, p.38.  Holotype: May, 1980, pl.8, figs.9,15.  Combination illegitimate: the generic name Ceratiopsis is illegitimate.  NOW Cerodinium diebelii subsp. rigidum.  Originally Deflandrea diebelii subsp. rigida, subsequently Ceratiopsis diebelii subsp. rigida (combination illegitimate), thirdly (and now) Cerodinium diebelii subsp. rigidum.  Age: Maastrichtian. Parent: Ceratiopsis diebelii