1 Tropical Marine Science Institute; National University of Singapore; 18 Kent Ridge Road; 119227; Singapore. tmslby@nus.edu.sg.
2 Australian Museum; 1 William St.; Sydney; NSW 2010; Australia; and School of Biological; Earth & Environmental Sciences; University of New South Wales; Kensington; NSW 2052; Australia. shane.ahyong@austmus.gov.au.
3 Lee Kong Chian Natural History Museum; Faculty of Science; National University of Singapore; 2 Conservatory Drive; 117377; Singapore. jcmendoza@nus.edu.sg.
4 Lee Kong Chian Natural History Museum; Faculty of Science; National University of Singapore; 2 Conservatory Drive; 117377; Singapore. nhmtansh@nus.edu.sg.