Tanaka, H. & Nagumo, T. (2000). Cyclostephanos numataensis sp. nov., a new Pleistocene diatom from Central Japan. Diatom. The Japanese Journal of Diatomology, 16: 19-25
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Tanaka, H. & Nagumo, T.
2000
Cyclostephanos numataensis sp. nov., a new Pleistocene diatom from Central Japan