Periphragella simplex
Schrammen 1912
Periphragella simplex has not been reported previously from Höver or Misburg, but from Oberg near Ilsede. It is a very rare species in the Lower Campanian of Höver.
The specimen of Periphragella simplex is goblet-shaped in the sense that it has a central paragastral cavity. The thin (1.0 to 1.5 mm) goblet wall shows numerous finger-like protrusions pointing outward or downward. All (!) protrusions have a round opening which faces downward. (The bottom-top orientation is not quite clear, and the author has adopted Schrammen's (1912) interpretation. Also, Schrammen wrote that not all protrusions have openings.)
Periphragella simplex consist of a thin (1.0 to 1.5 mm) skeletal sheet made up of approximately four or five layers of fused hexactines, which are arranged into a very regular meshwork in the centre of the wall, but show some disorder with many triangular meshes in the dermal layer. The hexactine nodes are slightly enlarged to small spheres.