Trilobites lived as planktonic, nektonic, epifaunal and infaunal organisms in deep and shallow marine environments. They lived as predators, filter feeders, deposit feeders, particle feeders, scavengers and even symbiotically... Read more


  • Phylum: Arthropoda
  • Class: Trilobita

Diagnostic features

These are the features that will help you to identify fossils as trilobites, and that you should be attempting to label on a sketch.

  • Pygidium
  • Thorax
  • Cephalon
  • Legs

Stratigraphic range

Cambrian to Permian