original descriptionHidalgo, J. G. (1888). Recherches conchyliologiques de M. Quadras aux ȋles Philippines (suite). <em>Journal de Conchyliologie.</em> 36(1): 30-97, pls. 4-6., available online athttps://www.biodiversitylibrary.org/page/15979966#page/38/mode/1up page(s): 69, 70, pl. 4, fig. 3 [details]