Abstract
A harpellalean fungus, Pennella angustispora, was collected in hindguts of blackfly larvae of Simulium (Simulium) japonicum, The larvae were collected at two small streams (150 m and 170 m above sea level) located ca. 600 m northwest of the Kanagawa Prefectural Museum of Natural History, Iryuda, Odawara, Japan. Those larvae were dissected to observe fungi both in hindguts and in midguts. Seven out of twenty larvae were infected with P. angustispora. This is the first record of this fungus in Kanagawa prefecture. Double infections with both Harpella melusinae (midgut) and P. angustispora (hindgut) in the same individuals were also observed.
