KIHARA, Yasuo, Kumiko TSUDA, Chizu ISHII, Erika ISHIZUMI, & Taisuke OHTSUKA 2015 (Dec. 31) Periphytic diatoms of Nakaikemi Wetland, an ancient peaty low moor in central Japan Diatom 31(1): 18-44, 323 figs., 2 tables