Phanerodinium opacum
From dinoflaj3
"opacum" (Brideaux, 1971, p.76–77, pl.21, figs.19–22; text-figs.7d–e) Below, 1987b, p.38. Holotype: Brideaux, 1971, pl.21, figs.21–22; text-figs.7d–e. NOW Microdinium. Originally (and now) Microdinium, subsequently Phanerodinium. Taxonomic junior synonym: Microdinium spinosum, according to Below (1987b, p.38). Age: middle-late Albian.
Parent: Phanerodinium