Xylonichnus garciorum (Genise, 1995)

Diagnosis: A boxwork of anostomosed longitudinalborings interconnected by short tangential ones in the pithof a cycad stem. Borings are 1 to 3 mm wide, they have noouter layer and most of them are filled with compactmasses of excrement. Some borings contain individualfecal pellets having hexagonal cross-sections.