- 昆蟲. ニューシリーズ (ISSN:13438794)
- vol.13, no.3, pp.133-135, 2010-09-25
Alate individuals of a tropical fire ant, Solenopsis geminata, were found by the first author on the ship "Ogasawara-maru", which traveled from Chichi-jima (the Ogasawara Islands) to Tokyo. This harmful species is known to occur in Japan, but records have hitherto been limited to isolated islands such as Iwo-jima (the Ogasawara Islands) and Okinawa-jima (the Ryukyu Islands). Since the liner anchored close to Iwo-jima just before that cruise, when it was possible that individuals of the species flew onboard. The discovery suggests the likelihood that the ant has been unintentionally introduced to Chichi-jima and even to the mainland of Japan.