Standard Article

Trilobita (Trilobites)

  1. Euan NK Clarkson

Published Online: 30 MAY 2001

DOI: 10.1038/npg.els.0001604



How to Cite

Clarkson, E. N. 2001. Trilobita (Trilobites). eLS. .

Author Information

  1. University of Edinburgh, Scotland, UK

Publication History

  1. Published Online: 30 MAY 2001


Trilobites are extinct marine arthropods in which the body is divided transversely into a head (cephalon), a thorax of articulated segments, and a tail (pygidium). The body is also divided longitudinally into a raised axis and two lateral lobes. Mature individuals range from about 1 mm in length to 700 mm.


  • trilobites;
  • basic design;
  • life histories;
  • diversity and habits;
  • phylogeny