Ostrakoden aus dem Grünlich-grauen Graptolithengestein

From a marly limestone geschiebe (glacial erratic boulder) the type-species of the genera Pseudobollia, Opisthoplax und Orthocypris, are described, which are known from the “Grünlich-graues Graptolithengestein” (greenish-grey graptolite rock; Wenlock/Ludlow). For this reason, the geschiebe is assigned to this kind of rock. Two new species of the genera Primitiopsis and Pariconchoprimitia are documented. Pariconchoprimitia has been known only from Upper Ordovician rocks, yet.