Cyclonephelium distinctum subsp. brevispinatum

"subsp. brevispinatum" (Millioud, 1969, p.427–428, pl.1, figs.8–9) Lentin and Williams, 1973, p.36.  Holotype: Millioud, 1969, pl.1, figs.8–9.  NOW Circulodinium brevispinatum.  Originally Cyclonephelium distinctum var. brevispinatum, subsequently Cyclonephelium distinctum subsp. brevispinatum, thirdly Cyclonephelium brevispinatum, fourthly (and now) Circulodinium brevispinatum.  Age: late Hauterivian–early Aptian.

Parent: Cyclonephelium distinctum