From Fensome et al., 2019:
(Alberti, 1961, p.29, pl.4, figs.7–13) Eisenack 1964, p.322. Holotype: Alberti, 1961, pl.4, fig.13. Combination not validly published: basionym not fully referenced. Originally Circulodinium, subsequently Cyclonephelium (combination not validly published). Taxonomic senior synonym: Cyclonephelium distinctum, according to Millioud (1969, p.427) and Fensome et al. (2019a, p.37). Age: late Barremian.

---------------------------------------------------------------------------------------------------