Calceola sandalina Lamarck overgrown with Aulapora repens Schlotheim
beautiful example of the slipper coral, Calceola. One side of the coral has been colonised by the grown of the 'net like 'coral, Aulapora using the coral as a hard substrate to grow on. From the famus old locality of Gerolstein.
Devonian, Eifelian.
Gerolstein, Eifel, Germany.
Coral : 3.2 cm long.
