入生田におけるアシマダラブユ幼虫腸内寄生菌の通年観察

抄録

Blackfly larvae are known as hosts of fungi classified in Harpellales (Kickxellomycotina). To investigate the ecological aspects of these fungi, we collected larvae of Simulium (Simulium) japonicum monthly from a small stream in Iryuda, Odawara City, Japan from April 2016 to March 2017. We dissected the collected larvae and examined the harpellalean fungi inhabiting the larval midguts and hindguts. Harpella melusinae was observed in the midgut of every larva. Simuliomyces microsporus was collected from hindguts in the spring and autumn–winter seasons, whereas Pennella angustispora was collected from hindguts in the summer and winter seasons. A specimen Smittium sp. inhabiting the hindgut of the Simuliidae larvae was obtained. This genus is new to Kanagawa Prefecture, however, additional isolates need to be obtained for species-level identification. In addition, simultaneous infection of three species, (i. e., Harpella melusinae in midgut, and P. angustispora and Si. microsporus in hindgut), was observed in some individuals in February and November.