Darren C. J. Yeo, PhD, 2001, National University of Singapore (NUS), is an Assistant Professor at the Department of Biological Sciences, NUS. He has published various articles and book chapters on systematics, invasion biology, and conservation of freshwater decapod crustaceans. Neil Cumberlidge, PhD, 1977, University of Hull, UK, is a Biology Professor at Northern Michigan University, USA. He has published more than 120 articles and book chapters on freshwater decapods, and chairs the IUCN Freshwater Crabs and Crayfish Specialist Group. Sebastian Klaus, PhD, 2009, University of Heidelberg, Germany, is a research fellow at the University of Frankfurt, Germany. He published on the historical biogeography, palaeontology and sperm morphology of primary freshwater crabs.