Trace Fossil or Ichnofossil
Trace fossils refer to the body parts and traces of activity left behind by various fauna. Common trace fossils include footprints, tracks, burrows and bored holes. These traces often have radiating and tubular structures, which are common traces of worms, arthropods, sea urchins, molluscs and terrestrial tetrapods. Arthropods commonly leave regular ‘footprints’ on land or along the shores of lakes. Eggs and dung of ovipara are also ichnofossils, and dinosaur footprints, bird footprints, trilobite relics, dinosaur and fish dung and stone artefacts of the Ape Man (Homo erectus) are trace fossils with high ornamental value.