Fremdskulpturen an Steinkernen von Polychaeten-Bohrgängen aus der Maastrichter Tuffkreide

In the cavities of diagenetic coral (Scleractinia) from the Maastricht tuff chalk, stone cores of tunnels penetrated by polychaetes into the coral reefs, showing on their surface the internal skeletal structures of the corals. The pattern of the disappeared septa, trabeculae, coenosteum, and other skeletal elements, which appears on the surface of the drill hole fills in the negative relief, in certain cases initially gives the impression of small Oculina species. These sculptures, which are also found on pebble stone cores and have nothing to do with the drilling organism itself, are called foreign sculptures. The simple cylindrical tunnels, probably created by Polychaeten, could perhaps be identified as Lapispecus Voigt 1970, provided that they have the typical but not always present bar for this Ichnogenus. The shallow tunnels are called Dodecaceria cretacea n.sp. described.