In the mobile mount
The designation of the holotype includes multiple specimens, which contravenes the provisions of the ICN; therefore, the species must be regarded as invalid.
Gohrbandt, K. 1963. Zur Gliederung des Palaogen im Helvetikum nordlich Salzburg nach planktonischen Foraminiferen. Mitteilungen der Geologischen Gesellschaft in Wien. 56: 1-116.
Hay, W. W. & Mohler, H. P. 1967, Calcareous nannoplankton from Early Tertiary rocks at Point Labau, France and Paleocene-Early Eocene correlations. Journal of Paleontology 41(6): 1505-1541.
Coccolithus bisulcus
Stradner in Gohrbandt , 1963
Paleocene
Station 63 /2/263 /1 (Go), north of Salzburg, Switzerland.