Registered 23,191 species  (Collections:373,756; Observations:74,544; Other records:5,869)
Classification : Eukarya - Opisthokonta - Animalia - Echinodermata - Echinoidea - Euechinoidea - Echinothurioida - Phormosomatidae - Phormosoma
真核生物ドメイン - Opisthokonta - 動物界 - 棘皮動物門 - ウニ/海胆綱 - Euechinoidea亜綱 - フクロウニ目 - Phormosomatidae科 - ナマハゲフクロウニ属

Species Phormosoma bursarium   A. Agassiz, 1881     ナマハゲフクロウニ

Agassiz, A. (1881) Report on the Echinoidea dredged by H. M. S. Challenger during the Years 1873-1876. Report on the Scientific Results of the Voyage of H. M. S. Challenger During the Years 1873-1876, Zoology, 9, Part 3, 1-321. 
Fujikura, K., Okutani, T. and T. Maruyama (2012) Deep-sea life —Biological observations using research submersibles: Second Edition. Tokai University Press, Kanagawa, Japan, 487 pp. (in Japanese). 
Shigei, M. (1986) The sea urchins of Sagami Bay, collected his Majesty the Emperor of Japan. Biological Laboratory, Imperial Household, Tokyo. 173pp.