I am interested in invertebrate systematics, Indo-Pacific biogeography, molecular and morphometric phylogenetics, and the theory and methods of biogeographical analysis. Currently I am helping develop method for combined phylogenetic and biogeographic analysis, and I am investigating the ancient and recent history of different invertebrate groups. My main taxa of interest are the cyphophthalmid Opiliones (especially Stylocellidae and Metasiro americanus), other lesser-known arachnid orders, Hymenoptera (especially ants), and holothurians.