Cyclagelosphaera margerelii Noël, 1965
All component exhibit inclined extinction lines and length-fast (-) elongation. The extinction lines are dextrogyre on the distal side, and their typical angles are typically around 73° on the distal shield and 60° on the tube cycles on the distal side (Figures 21AB in Varol, 2025a).
Circular placoliths have single-tiered distal and proximal shields and a double tube cycle. The central area may be open without any structure or closed.
Noël, D. 1965. Sur les Coccolithes du Jurassique Européen et d'Afrique du Nord. Essai de classification des coccolithes fossiles. Éditions du Centre National de la Recherche Scientifique, Paris. 1-129.