1. The University Museum, The University of Tokyo, Tokyo, Japan
2. Laboratory of Wildlife Ecology, Obihiro University of Agriculture and Veterinary Medicine, Obihiro, Japan
3. Institute of Ecology and Biological Resource, Vietnamese Academy of Science and Technology, Hanoi, Vietnam
4. College of Veterinary Medicine, Seoul National University, Seoul, Korea
5. Laboratory of Anatomy, Department of Basic Veterinary Sciences, Obihiro University of Agriculture and Veterinary Medicine, Obihiro, Japan
6. Kyoto University Museum, Kyoto University, Kyoto, Japan
7. Graduate School of Science, Department of Zoology, Kyoto University, Kyoto, Japan