Evolution, morphological variation and patterns and processes of origination and extinction rates within the Chondrichthyans throughout the Phanerozoic.
Phylogeny and systematics of Middle – Late Devonian Chondrichthyan Faunas from Ohio and Kentucky.
Phylogeny and systematics of Mississippian Chondrichthyan Faunas from Kentucky, Indiana, and Iowa.
Phylogeny and systematics of Pennsylvanian and Permian Chondrichthyan Faunas from Ohio, West Virginia, Pennsylvania, Kentucky, Missouri, and Kansas.
Phylogeny and systematics of Cretaceous and Cenozoic Chondrichthyan Faunas from the Southeastern and Gulf regions of the US.
Patterns and processes of evolutionary convergence within marine vertebrates.
Statistical analysis of abundance and diversity of "fish" faunas from marine and freshwater bone-beds.
Phylogeny and systematics of Cenozoic Sepiids.
Phylogeny and systematics of Cretaceous and Cenozoic Echinoids from the Southeastern and Gulf regions of the US.
Evolution, morphological variation and disparity within the Echinoidea throughout the Phanerozoic.
Systematic and morphological analysis of the fauna from the Conasauga Formation in Georgia and Alabama, USA.
Methods of breakdown and digestion of fossil-bearing siliciclastic and carbonate sedimentary rocks in order to retrieve ichthyoliths.