T.  Kuroda and Habe, T., A catalogue of molluscs of Wakayama Prefecture, the Province of Kii. 1, Bivalvia, Scaphopoda and Cephalopoda, vol. 7. Wakayama: Wakayama-ken Kairui Mokuroku Kankokai, 1981, p. 301.

S.  Higo, Callomon, P., and Goto, Y., Catalogue and bibliography of the marine shell-bearing Mollusca of Japan: Gastropoda, Bivalvia, Polyplacophora, Scaphopoda. Japan: Elle Scientific Publications, 1999, p. 749.

S.  Higo, Callomon, P., and Goto, Y., Catalogue and bibliography of the marine shell-bearing Mollusca of Japan: Gastropoda, Bivalvia, Polyplacophora, Scaphopoda. Japan: Elle Scientific Publications, 1999, p. 749.

T.  Kuroda and Habe, T., A catalogue of molluscs of Wakayama Prefecture, the Province of Kii. 1, Bivalvia, Scaphopoda and Cephalopoda, vol. 7. Wakayama: Wakayama-ken Kairui Mokuroku Kankokai, 1981, p. 301.