Phacopoidea is a superfamily of trilobites.

  • trilobites.info - Gallery of Phacopida
  • [http://www.trilobites.info/ordphacopida.htm] - General information
  • [https://web.archive.org/web/20050314170245/http://jgalef2004.sphosting.com/trilobite/td2.html] - More images