Chiasmolithus grandis

Coccolithus grandis Bramlette & Riedel, 1954

Very Large (>15.0µm] species of Chiasmolithus has a tube cycle with four small conjuncts teeth-like projections along the principal axes.

The original publication fails to recognise the teeth-like projections. Therefore, the holotype of Chiasmolithus grandis is identical to that of Coccolithus expansus Bramlette & Sullivan (1961). The latter authors reanalysed the material from the type locality and amended the description of Chiasmolithus grandis to include teeth-like projections. This amendment is undoubtedly arguable since Bramlette & Sullivan (1961) did not perform the amendation on the original slide or sample.

Bramlette, M. N. & Sullivan, F. R., (1961): Coccolithophorids and related nannoplankton of the Early Tertiary in California. - Micropaleontology. 7(2): 129-188.

Radomski, A., (1968): Pozimy nannoplankton wapiennego w Paleogenie Polskich Karpat Zachodnich [Calcareous nannoplankton zones in Palaeogene of the western Polish Carpathians]. - Rocznik Polskie Towarzystwo Geologiczne = Annales de la Société Géologique de Pologne. 38: 545-605.