Shigei, M. 1977. A new species of the echinothurioid sea-urchins, Sperosoma nudum, from the North Pacific, off central Japan. Journal of the Faculty of Science, Tokyo University, Section 4, Zoology 14, 71-77.
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Shigei, M.
1977
A new species of the echinothurioid sea-urchins, Sperosoma nudum, from the North Pacific, off central Japan
Journal of the Faculty of Science, Tokyo University, Section 4, Zoology