The Mazon Creek Fossil Fauna is a complete and updated taxonomic guide to this important assemblage and includes descriptions and color photos of species that collectors are likely to find in the field or see in most large collections. With high-quality color photographs of fossils from the collections of The Field Museum of Natural History, the Chicago Academy of Sciences, and amateur collectors, The Mazon Creek Fossil Fauna will be a valuable tool for fossil identification by collectors as well as professionals. It is a companion volume to the well-received publication, The Mazon Creek Fossil Flora (2006).