Torii Takaaki
IDEA Consultants Inc., 1334-5, Riemon, yaizu-shi, Shizuoka Pref., 421-0212 Japan; Email:
Zootaxa. 2015 Aug 18;4000(4):473-82. doi: 10.11646/zootaxa.4000.4.6.
Three species of semi-aquatic freshwater Enchytraeidae of the genera Mesenchytraeus Eisen, 1878, Chamaedrilus Friend, 1913 and Globulidrilus Christensen & Dózsa-Farkas, 2012 are described from stream, wet soil or snow habitats in the Ozegahara Mire, an extensive high moor in heavy snowfall area in central Japan. Among Mesenchytraeus speies, Mesenchytraeus nivalis sp. nov. is distinguished by not having enlarged chaetae and spermathecal diverticula, vas deferens with atrial glands 3 or 4 in number and club-shaped, spermathecal ental duct short, with sperm bundles in the sperm sack. Chamaedrilus ozensis sp. nov. closely resembles C. floridae, but the length of the sperm funnel and character of the coelomocytes are different. Globulidrilus helgei Christensen & Dózsa-Farkas, 2012 is recorded for the first time from Japan.
在日本中部大雪地区的一片广阔高沼地——尾瀬原湿地中，溪流、湿润土壤或雪地栖息地发现了三种半水生淡水线蚓科物种，分别属于艾氏中蚓属（Mesenchytraeus Eisen，1878）、矮蚓属（Chamaedrilus Friend，1913）和球蚓属（Globulidrilus Christensen & Dózsa-Farkas，2012）。在艾氏中蚓属物种中，新种雪栖艾氏中蚓（Mesenchytraeus nivalis sp. nov.）的特征为没有增大的刚毛和受精囊憩室，输精管具3或4个心房腺且呈棒状，受精囊内导管短，精囊中具精子束。新种尾瀬矮蚓（Chamaedrilus ozensis sp. nov.）与佛罗里达矮蚓（C. floridae）非常相似，但精漏斗长度和体腔细胞特征不同。球蚓属的黑尔盖球蚓（Globulidrilus helgei Christensen & Dózsa-Farkas，2012）首次在日本被记录。
