Acknowledgments; List of contributors; Introduction Nicholas C. Fraser and Hans-Dieter Sues; Part I. Phylogeny: Introduction; 1. Late Triassic and Jurassic amphibians: fossil record and phylogeny Andrew Milner; 2. The Lepidosauromorpha: an overview with special emphasis on the Squamata Olivier Rieppel; 3. Late Triassic-Early Jurassic sphenodontians from China and the phylogeny of the Sphenodontia Xiao-chun Wu; 4. Marine members of the Sphenodontia Robert L. Carroll and Rupert Wild; 5. Patterns of evolution in Mesozoic Crocodyliformes James M. Clark; 6. Sister-group relationships of mammals and transformations of diagnostic mammalian characters Zhexi Luo; Part II. Faunal Assemblages: 7. A review of the British Middle Triassic tetrapod assemblages Michael J. Benton, Geoffrey Warrington, Andrew J. Newell and Patrick S. Spencer; 8. Small tetrapods from the Upper Triassic of the Richmond Basin, Virginia Hans-Dieter Sues; 9. Microvertebrates from the Placerias Quarry: a window on Late Triassic vertebrate diversity in the American Southwest Fran Tannenbaum Kaye and Kevin Padian; 10. Late Triassic microvertebrates from central Europe Denise Sigogneau and Gerhard Hahn; 11. Assemblages of small tetrapods from British Late Triassic fissure deposits Nicholas C. Fraser; 12. Ornithiscian dinosaurs from the Upper Triassic of the United States Adrian P. Hunt and Spencer G. Lucas; 13. Early Jurassic small tetrapods from the McCoy Brook formation of Nova Scotia Neil H. Shubin, Paul E. Olsen and Hans-Dieter Sues; 14. The small tetrapods of the Lower Lufeng Formation, Yunnan, China Zhexi Luo and Xiao-chun Wu; 15. Assemblages of small tetrapods from the Early Jurassic of Britain Susan E. Evans and Kenneth A. Kermack; 16. A review of the Early Jurassic tetrapods from the Glen Canyon Group of the American Southwest Hans-Dieter Sues, James M. Clark and Farish A. Jenkins, Jr; 17. An Early or Middle Jurassic tetrapod assemblage from the La Boca Formation, northeastern Mexico James M. Clark, Marisol Montellano, James A. Hopson, René Hernández and David Fastovsky; 18. Middle Jurassic microvertebrate assemblages from the British Isles Susan E. Evans and Andrew Milner; 19. A new Bathonian microvertebrate locality in the English Midlands Sara J. Metcalf and Rachel J. Walker; Part III. Faunal Change: 20. The chronology and biogeography of mammalian origins Spencer G. Lucas and Adrian P. Hunt; 21. Biotic and climatic changes in the Carnian (Triassic) of Europe and adjacent areas Michael J. Simms, Alastair H. Ruffell and Andrew L. A. Johnson; 22. Late Triassic to Middle Jurassic extinctions among continental tetrapods Michael J. Benton; 23. Comments on 'Late Triassic to Middle Jurassic extinctions among continental tetrapods' Nicholas C. Fraser and Hans-Dieter Sues; 24. What was the tempo and mode of evolutionary change in the Late Triassic to Middle Jurassic? Kevin Padian; 25. Field trip guide: field guide to three late Triassic tetrapod sites in Virginia and North Carolina Paul E. Olsen and Annika K. Johansson.