"A general theory of evolution would be rooted in a hierarchical view of nature, and will possess a common body of causes and constraints, but will recognize that they work in characteristically different ways in the material of different levels. . . The new theory will restore to biology a concept of organism." - Stephen Jay Gould (1980).
The primary focus of my research is on elucidating evolutionary mechanisms, with a particular emphasis on those mechanisms which produce changes in morphology and biogeography.
Evolutionary and developmental constraints on morphological structure in rodent dentition.
Evolutionary and developmental constraints on the shape and structure of the inner-ear of tetrapods.
Evolutionary morphology and phylogenetic systematics of fossil and extant testudinoid turtles.
Biogeographic distribution and population genetic structure of microtine rodents in North America and Japan.
Biogeographic distributions and ecological limitations of extant turtles.