additional sourceDautzenberg P. (1891). Contribution la faune malacologique du Golfe de Gascogne. <em>Mémoires de la Société Zoologique de France.</em> 4: 604-619, pl. 16-17., available online athttp://biodiversitylibrary.org/page/10114839 page(s): 613, pl. 16 fig. 1-2 [details]
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