1. Laboratory of Sustainable Environmental Biology, Graduate School of Agricultural Science, Tohoku University, 232‐3 Naruko‐onsen Yomogida, Osaki, Miyagi 989‐6711, Japan
2. Department of Molecular Protozoology, Research Institute for Microbial Diseases, Osaka University, Suita, Osaka 565‐0871, Japan
3. Laboratory of Malariology, Research Institute for Microbial Diseases, Osaka University, Suita, Osaka 565‐0871, Japan
4. Laboratory of Forest Ecology, Graduate School of Agricultural Science, Tohoku University, 232‐3 Naruko‐onsen Yomogida, Osaki, Miyagi 989‐6711, Japan