Here is the fourth supplement to Dinosaurs: The Encyclopedia, a 1998 American Library Association Outstanding Reference Book. This volume updates the concepts discussed in the encyclopedia and its earlier supplements. It includes a discussion of the Mesozoic Era, covers recent discoveries in paleontology, and furthers the ectothermy/endothermy debate from previous installments. It also offers lengthy sections on dinosaurian schematics and genera and updates the encyclopedia's list of excluded genera. Appendices discuss Pterosaurs and Mesozoic birds, and a glossary is included to aid students and scientists alike. The extensive bibliography lists the most recent peer-evaluated paleontology literature. Supplemental volumes do not repeat information from earlier volumes, but build upon them: view all volumes on the series page.