Saito-Kato, M., Hayashi, T. and Tanimura, Y. (2011) “Tetracyclus radius (Bacillariophyta) a new fossil species from Miocene freshwater sediments in the Japan Sea”, Phytotaxa, 24(1), pp. 51–57. doi: 10.11646/phytotaxa.24.1.7.