Planavolites Mikuláš, 1992

Grazing; substrate calcareous; tracemaker invertebrate

Diagnosis: Flat, considerably large depressions of irregular oval or very elongated form, occuring on the surface of a firm limestone substrate. The outline is undulated, sometimes lobate, even with pointed prejections. The bottom is rounded, more or less smooth, in some individuals with flat protrusions or depressions. The walls are usually steep, perpenticular or slightly overhanging; borings often occur in large groups. The usual dimension at the surface of sibstrate is c. 50 mm, depth 10-15 mm.

Category of architectural design: 2.63. Circular holes and pit-shaped borings.

Unbranched, circular.