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A Guide to the Orders of Trilobites
Information for these prehistoric animals includes their morphology, ecology, systematics, and development (ontogeny). Features an image gallery, a systematic listing of trilobite families from the Treatise on Invertebrate Paleontology, a geologic timeline, fact sheets, A FAQ, a glossary, and more. Created and maintained by a biologist with The Nature Conservancy.
http://www.trilobites.info/

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