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RESEARCH PRODUCT

Presence of the genus Bythinella Moquin-Tandon, 1856 (Gastropoda, Bythinellidae) and other hydrobioids in Saône-et-Loire (Burgundy, France): taxonomic considerations and conservation issues.

subject

description

While listing spring-dwelling snails in the regionBourgogne Franche-Comté (eastern France), we found threelocalities with living representatives of the genus BythinellaMoquin-Tandon, 1856 in the department of Saône-et-Loire. Toour knowledge, they represent the only Bythinella -bearinglocalities currently known in this department. The sampledindividuals share several shell features with B. carinulata(Drouët, 1867), B. viridis (Poiret, 1801) and B. lanceleveiLocard, 1884. Pending a complementary genetic analysis, weidentify these specimens as Bythinella sp. Two of the threelocalities also yielded empty shells of Islamia andBythiospeum . They represent the westernmost occurrence ofthese stygobiont genera in eastern France.The presence of three hydrobioid gastropods in Saône-et-Loirealso has consequences in terms of conservation biology.Indeed, these taxa are particularly sensitive to water qualityand spring management, and they may well belong to speciesthat are integrally protected over the entire metropolitanFrench territory.