The website “A Guide to the Orders of Trilobites” has an amazing amount of information about trilobites.  It’s been online since at least 2000.  The website is run by Sam Gon III, a conservation biologist at TNC Hawai’i.  He also does the Anomalocaris Homepage.  You can order a copy of the website in book form.  If you love trilobites, this website is for you!

Start with the FAQ.  Here’s just a partial list of topics covered by the website:

• Introduction
• Glossary of terms
• Dorsal Morphology
• Ventral Morphology
  
• Internal Anatomy
  
• Major Features
• Facial Sutures
• Special Terms
• Trilobite Eyes
• Classification
• Origins
• Ecology
• Localities
• And much, much, more!