1. Marine Biological Laboratory, Graduate School of Science, Hiroshima University, Onomichi, Hiroshima 722-0073, Japan
2. Institute for Biogenesis Research, University of Hawaii, HI 96822, USA
3. National Institute of Genetics, Mishima, Shizuoka 411-8540, Japan
4. Marine Genomics Unit, Okinawa Institute of Science and Technology Graduate University, Onna, Okinawa 904-0495, Japan