Research

(1) Evolutionary transformations in the origins of modern tetrapod groups (lissamphibians, mammals, non-avian reptiles)

(2) Morphology and bone microstructure in the synapsid forerunners of mammals and other early tetrapods (Paleohistology Projects)

(3) Effects of mass extinctions on morphologic and life history evolution (Permian Life: Before the Dinosaurs)

(4) Paleoecology and biogeography of tetrapods during the Carboniferous-Permian icehouse-hothouse transition and end-Permian mass extinction (Permian Life: Before the Dinosaurs)