A Pictorical Guide to the Orders of Trilobites

Trilobites are the most diverse
group of extinct animals preserved in the fossil record.  Ten orders of trilobites are recognized, into
which 20,000+ species are placed.  Learn
more about trilobite morphology, anatomy, ecology, behavior, reproduction, and
development, and how they relate to trilobite origins, evolution, and
classification.  Explore trilobite biostratigraphy,
paleobiogeography, persistence across geological time, and their ultimate
extinction. View galleries of trilobite images from the web, examine fact
sheets, pictorial guides, and an identification key for each order, refer to a
family listing, a genus listing, or consult a trilobite glossary and
bibliography, tour world famous trilobite localities, explore links to other
web resources on trilobites, and review books on trilobites, including an
exclusive hardcopy pictorial adaptation of this website.