- タクサ:日本動物分類学会誌 (ISSN:13422367)
- vol.38, pp.26-41, 2015-02-28 (Released:2018-03-30)
Diverse aquatic organisms are living in the immediate freshwater environments such as the rice field, pond and ditch. This study reports a freshwater ostracod fauna of rice field and spring from Fuji and Fujinomiya, Japan. We found 14 species (13 genera), and Pseudocandona pratensis (Hartwig, 1901) is newly recorded from Japan. The morphological characters, distribution in Japan, and taxonomic remarks are provided for these species. And also five species were given the new Japanese name. We discussed on the distribution of Dolerocypris ikeyai Smith and Kamiya, 2006 and Stenocypris hirutai Smith and Kamiya, 2006 found from rice field. Both species has been reported from runoff of spring, seeps, interstitial environment. We regarded their reduced swimming setae on antenna as an adaptive character to shallow and gently water flow. Population of rice field of this two species could be originated from the source of an irrigation channel, and they might be incidentally stayed in the rice field.