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Bythiospeum charpyi 

Scope: Europe
Language: English
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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Mollusca Gastropoda Littorinimorpha Hydrobiidae

Scientific Name: Bythiospeum charpyi (Paladilhe, 1867)
Taxonomic Notes: This species lies within one of the groups of subterranean snails that need research using molecular systematics to determine the taxonomic status and the species limits. A conservation assessment is made based on data from shell morphology pending the results for full analysis for the group.
Bernasconi (1990) considers this taxon as a subspecies of B. diaphanum.The nominate species and the subspecies are known from various sites in France and Switzerland (Bertrand 2004) with subspecies are currently recognized : charpyi (Paladilhe, 1867)  in France and Switzerlandgiganteum Bernasconi, 1969  only in France.

Assessment Information [top]

Red List Category & Criteria: Least Concern (Regional assessment) ver 3.1
Year Published: 2010
Date Assessed: 2009-11-11
Assessor(s): Prié, V.
Reviewer(s): Seddon, M.B., Gargominy, O. & George, S.
Justification:
This group is in need of taxonomic studies based on anatomical and molecular characters, and once refined the species limits, subsequent field investigations to determine distribution.  However based on the current status of knowledge, the species has been given an assessment of Least Concern, rather than Data deficient, reflecting the current wide range. This species is protected by French legislation.

Geographic Range [top]

Range Description:Based on records from shells, Bythiospeum charpyi has a wide range in France (départements of Doubs, Jura, Haute Saone and Territoire de Bellfort) and Switzerland (Bern canton).  It is considered as two subspecies by some authors, B. c. charpyi (Paladilhe, 1867)  in France and Switzerland;  B. c. giganteum Bernasconi, 1969 which is only found France.
Countries occurrence:
Native:
France (France (mainland)); Switzerland
Additional data:
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:There is no data available on the population trends for this species.
Current Population Trend:Unknown
Additional data:
Population severely fragmented:No

Habitat and Ecology [top]

Habitat and Ecology:This species lives in subterranean waters.
Systems:Freshwater

Threats [top]

Major Threat(s): Subterranean habitats are vulnerable to water pollution from domestic (sewage and run-off) or agricultural (nutrient loads, herbicide and pesticides) sources. Lowering of the water levels in the aquifer may degrade the habitat if the aquifers are overexploited.

Conservation Actions [top]

Conservation Actions: Bythiospeum charpyi is protected by law in France.

Citation: Prié, V. 2010. Bythiospeum charpyi. The IUCN Red List of Threatened Species 2010: e.T156022A4891344. . Downloaded on 19 November 2017.
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