Scriniodinium? novissimum Morgenroth, 1968

NOW Endoscrinium?. Originally Scriniodinium, subsequently Scriniodinium?, thirdly (and now) Endoscrinium?.
Stover and Evitt, 1978 considered this to be a "provisionally accepted species" of Scriniodinium.

Holotype: Morgenroth, 1968, pl.43, fig.4
Age: Danian

Supplemental description: Hultberg, 1985, p. 144-145
Cavate cyst, composed of endophragm and periphragm, mostly separated by an irregular pericoel. The surface of endophragm and periphragm is smooth. The shape of the endophragm is rounded rhomboidal with very slight apical an1 antapical protrusions. The shape of the periphragm is rounded rhomboidal. The periphragm is very dark in color. There is no trace of paratabulation, except archeopyle. The archeopyle is precingular, type P, formed by the detachment of paraplate 3". Operculum free. Paracingulum is indicated by folds in the endophragm and periphragm. Parasulcus is indicated by a slight depression on the midventral surface.
Size - 42-54 µm (length), 27-35 µm (breadth).