Hayashi, R. (1938) Sea-stars of Toyama Bay. Bull. Biogeogr. Soc. Japan, 8 (7) : 111-119.
Hayashi, R. (1943) Contributions to the classification of the seastars of Japan II. Forcipulata, with the note on the relationships between the skeletal structure and respiratory organs of the sea-stars. J. Fac. Sci. Hokkaido Imp. Univ. Ser. VI Zool. (8): 133-281.
Honma, Y. and T. Kitami (1978) Fauna and flora in the waters adjacent to the Sado Marine Biological Station, Niigata University. Ann. Rep. Sado Mar. Biol. Stat., Niigata Univ., (8): 7-81.