CURATOR EMERITUS JOHN BOLT
focuses on the early diversification of tetrapods, particularly amphibians, from the Mississippian, Pennsylvanian and Early Permian age (ca. 360 to 270 myr B.P.). The relationships and morphology of primitive amphibians from a new Mississippian locality in Southeastern Iowa constitutes one area of current research. Other studies examine the fossil evidence for the origin and evolution of the tetrapod auditory system and its implications for otic evolution and tetrapod relationships, and the origin and early evolution of the living amphibians (lissamphibians).