Cyclonephelium distinctum var. psilatum Yu Jingxian and Zhang Wangping, 1980

Now Circulodinium distinctum sbsp. psilatum. Originally Cyclonephelium distinctum var. psilatum, subsequently Cyclonephelium distinctum ssp. psilatum, thirdly (and now) Circulodinium distinctum ssp. psilatum.
Holotype: Yu Jingxian and Zhang Wangping, 1980, pl.4, fig.1
Age: Turonian-Santonian