Perna, R. L. “Bucardium grateloupianum N. Sp. From the Lower Miocene of Aquitaine With    taxonomic Comments on Some Fossil Species from Europe (Bivalvia, Cardiidae)”. Zootaxa, vol. 4178, no. 4, Oct. 2016, pp. 568–582, doi:10.11646/zootaxa.4178.4.7.