The parasitic nematodes of Apodemus speciosus [As: Abbreviation of host name] and A. argenteus [Aa] (Murinae: Muridae: Rodentia) collected on Yaku-shima I., Tanega-shima I., and Kuchinoerabu-jima I., southern part of Japan, were investigated. Total number of the mice examined is 38 individuals of As and 36 individuals of Aa collected on Yaku-shima I., 27 individuals of As and 5 individuals of Aa collected on Tanega-shima I., and 2 individuals of As collected on Kuchinoerabu-jima I., respectively. Nine nematode species were obtained from Yaku-shima I., viz., Heligmonoides speciosus [Hosts: As, Aa], Syphacia emileromani [Aa], Syphacia sp. [larval form] [Aa], Heterakis spumosa [As], Subulura (Murisubulura) suzukii [As], Rictularia cristata [As, Aa], Mastophorus muris [Aa], Rhabditis (Pelodera) orbitalis [3rd larva] [As], and Capillariidae gen. sp.[Aa]. On the other hand, 6 nematode species were obtained from Tanega-shima I., viz., H. speciosus [As, Aa], S. emilerornani [Aa], S. (M.) suzukii [As, Aa], R. cristata [As, Aa], M. muris [As, Aa] and Gongylonema (Gongylonema) neoplasticum [As], and only 1 species, H. speciosus, was obtained from Kuchinoerabu-jima I. [As]. There are several studies on the parasitic nematodes of the genus Apodemus of Kyushu and its surrounding offshore islands. However, this is the first report of the nematodes from Yaku-shima I., Tanega-shima I. and Kuchinoerabu-jima I.. These nematodes are common with those of mainlands of Japanese Islands although Ohsumi Is. are thought to have been isolated from Kyushu between 100,000 and 130,000 years ago.
The first report of parasitic nematodes of Apodemus spp. (Muridae: Rodentia) collected on Ohsumi Islands, Kagoshima Pref., Japan
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