Cleistosphaeridium sarmentum
From dinoflaj3
"sarmentum" Stancliffe, 1991, p.187–188, pl.1, figs.1–2; pl.2, fig.6; text-figs.5A–B. Holotype: Stancliffe, 1991, pl.1, figs.1–2; text-figs.5A–B. NOW Downiesphaeridium. Originally Cleistosphaeridium, subsequently Impletosphaeridium, thirdly (and now) Downiesphaeridium. N.I.A. Age: late Oxfordian.
Parent: Cleistosphaeridium