Preston, H.B. 1916. Descriptions of new freshwater shells of Japan. Annals and Magazine of Natural History 17 (8th ser.): 159-163. https://www.biodiversitylibrary.org/page/18616948.
(intro'd as intra-sp. of Cardium casertanum Poli, 1791)
Preston, 1916. Ann. Mag. Nat. Hist. 17: 162.