Volkichnium volki Pfeiffer, 1965

Descriptions.-Irregular star-like systems of cylindrical shallow burrows, oval in cross section and with smooth walls, that radiate from a centre and opent to the surface at the ends. Six to eight 'rays', straight or slightly curved or even branching, are present. The diameter of each burrow is slightly larger in the distal part; their ends directed upwards. Length of a single 'ray' ranges from 25 to 45mm, diameter 4 to 10mm; the biggest specimen is 9 cm across. Convex hyporeliefs.