Circulodinium distinctum subsp. psilatum

subsp. psilatum (Yu Jingxian and Zhang Wangping, 1980, p.115, pl.6, figs.1-2) Lentin and Williams, 1989, p.63.  Holotype: Yu Jingxian and Zhang Wangping, 1980, pl.6, fig.2.  Originally Cyclonephelium distinctum var. psilatum, subsequently Cyclonephelium distinctum subsp. psilatum, thirdly (and now) Circulodinium distinctum subsp. psilatum.  Age: Turonian-Santonian. Parent: Circulodinium distinctum