The organic-walled dinoflagellate cyst Craspeodinium [sic] “turonicum” was described in German by Prössl (1990, pp. 108–109) from the Lower to Upper Turonian of the Konrad 101 borehole (NW Germany), translated here as:
Diagnosis: The cavate cyst consists of a thicker endophragm and a thinner ectophragm. A rough to fine-mesh reticulum on the inside of the ectophram is partially connected to the endophragm by round or elongate columns. The outer side of the ectophragm is smooth, but partially folded.
Description: The ectophragm is to a large part separated from the inner body, particularly in the left lateral region. In the ventral and dorsal area, as well as at the antapex it is closely appressed to the endophragm, with the result that two antapical horns are often visible. The paracingulum is often marked by two narrow parallel sutures. The parasulcus appears mostly not reticulate. The reticulum itself consists of a ‘coarse-meshed’ part of first order; within the thickened parts, a fine-mesh part of second order is superimposed. Based on the absence of the apical operculum, the outline of 6 precingular plates becomes visible. The archaeopyle corresponds to the type tAtI following Helenes (1983).
The dinocyst became validly published on specifying a holotype in a succeeding paper (Prössl, 1992).
Craspedodinium was questionably placed in the Subfamily Ovoidinioideae (Order Peridiniales) by Fensome et al. (1993), who considered that the archaeopyle is comprised of apical and intercalary …