Planolites
Planolitesis an unbranching, unlined burrow filled with sediment that is distinctly different from surrounding sediment. It is distinguished from Palaeophycus, another unbranching horizontal burrow, which is lined and is filled with sediment essentially identical to the surrounding sediment.
Species
Planolites sp.
Occurrence:
Reference: Hannibal, 1996
Similar to Paleophycus, but with burrow fill of different composition