Redescription of Simulium (Simulium) japonicum (Diptera: Simuliiae) and its entomopathogenic fungal symbionts

Immature stages of Simulium (Simulium) japonicum were collected and redescribed from Korea. Descriptions are supplemented with photographs of larvae and pupae as well as habitat information. The fungal pathogenic parasite, Coelomycidium simulii, is reported for the first time from Korea. Coelomycidium simulii, a widespread pathogen of black fly larvae, was found in Simulium (Simulium) japonicum larvae with infection rate of 2%.