Cyclonephelium distinctum var. brevispinatum
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"var. brevispinatum" Millioud, 1969, p.427–428, pl.1, figs.8–9. 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