Logo from the AGA 2018 President’s Symposium: Origins of Adaptive Radiation, and model systems studied by contributors to the symposium and this issue. Yellow dots represent areas where field studies have been conducted and do not accurately represent the full geographic distribution of each group. Organisms in ovals, anti-clockwise from center right: Mediterranean labrine wrasses, Alpine charr (Salvelinus umbla complex), European Alpine whitefish (Coregonus spp.), Caribbean Anolis lizards, San Salvador pupfish (Cyprinodon sp.), spadefoot toads (Spea sp.), stickleback fish (Gasterosteus aculeatus), Hawaiian spiders, Laupala crickets, Nesophrosyne leafhoppers, Hawaiian Metrosideros plants, Hyposmocoma moths, Hawaiian honeycreepers, Hawaiian Bidens, Galapagos land snails (Bulimulus sp.), Darwin’s finches (Geospiza sp.), mainland Anolis lizards, Heliconius butterflies, Neospiza finches of the Tristan da Cunha archipegalo, African Rift Lake cichlids, and Cameroon crater lake cichlids. Logo artwork by Sara Heimlich. Photography credits anti-clockwise from center right: O. Seehausen, O. Seehausen, O. Seehausen, J.Stroud, C.Martin, D. Pfennig, A. Hendry, R. Gillespie, K. Shaw, G. Bennett, E. Stacy, D. Rubinoff, J. Jeffreys, M. Knope, C. Parent, A. Hendry, J. Stroud, J. Mallet, P. Ryan, C. Wagner, C. Martin.