Cretaceous sponges from the Campanian of Misburg and Höver |
![]() Figure 5 - Coscinostoma fragilis, Teutonia, Misburg. ![]() Figure 6 - Coscinostoma fragilis, Teutonia, Misburg. |
The gastral surface of Coscinostoma fragilis shows a pattern of star shaped furrows around fairly large central postica, and with further postica on the floors of the furrows (Figures 4 and 5). In some cases the central pores may be slightly raised. The dermal surface is crowded with pinhole sized ostia (Figure 6). Some specimens (e.g. dark areas in Figure 3) show relics of a very thin cortex on both surfaces. Where present, postica can not be discerned. |
![]() Figure 7 - Coscinostoma fragilis, Teutonia, Misburg. ![]() Figure 8 - Coscinostoma fragilis, Teutonia, Misburg. |
The skeleton of Coscinostoma fragilis is made up of tiny (ca. 250 µm) rhizoclones (Figures 7 and 8). The epirhabds ususally have a smooth surface and are often curved, with clones always attached to the convex side. |