|Scope: Global, Europe & Mediterranean|
|Scientific Name:||Obscurella bicostulata (Gofas, 1989)|
Cochlostoma bicostulatum Gofas, 1989
|Taxonomic Source(s):||Bank, R.A. and Neubert, E. 2017. MolluscaBase. Checklist of the land and freshwater Gastropoda of Europe. Last update: July 16th, 2017.|
|Taxonomic Notes:||Following MolluscaBase (Bank and Neubert 2017), this species was moved from Cochlostoma (a primarily Asian genus) to Obscurella.|
|Red List Category & Criteria:||Least Concern ver 3.1|
|Reviewer(s):||Neubert, E. & Ward, J.|
This species lives within a relatively wide range and there are several known sub-populations. There is no reason to suppose that the area of occupancy, extent of occurrence, number of locations, number of sub-populations or the number of mature individuals are declining or extremely fluctuating. Therefore, it is assessed as Least Concern (LC).
|Previously published Red List assessments:|
|Range Description:||This species is distributed in northern Spain (in the Basque country, Cantabria and Asturias). Within its range, this species is not rare: at least 80 locations are published by Gofas (2001). Therefore, there is no reason to suppose that the area of occupancy (300 km2), extent of occurrence (8,500 km2) or the number of locations are declining or extremely fluctuating.|
Native:Spain (Spain (mainland))
|Range Map:||Click here to open the map viewer and explore range.|
Within its relatively large range, this species does not seem to be rare. Therefore there is no reason to suppose that the number of sub-populations or the number of mature individuals are declining or extremely fluctuating.
|Current Population Trend:||Stable|
|Habitat and Ecology:||According to Gofas (2001), this species prefers rocky habitats in limestone areas where it is usually found among mounds of loose large stones in shaded places at the base of rocks. This species is usually not found on bare, exposed rock surfaces. It is sometimes found in the same areas as Cochlostoma hidalgoi, but they are separated by the habitat type (C. hidalgoi prefers the rock surface).|
|Continuing decline in area, extent and/or quality of habitat:||No|
|Use and Trade:||The species is not utilized.|
Due to its habitat preference, this species does not seem to be very sensitive to ecosystem modification or other realistic threats. Considering that this species inhabits inaccessible locations, drastic and wide-scale ecosystem modification is only a hypothetical threat and local events do not affect the whole population significantly.
This species is not protected in Spain, although at least a part of its populations live within protected areas in the Picos de Europa National Park and Parque Natural de Fuentes Carrionas y Fuente Cobre-Montaña Palentina. No conservation actions are currently required.
|Amended reason:||Following MolluscaBase (Bank and Neubert 2017), this species was moved from Cochlostoma (a primarily Asian genus) to Obscurella.|
Bank, R.A. and Neubert, E. 2017. MolluscaBase. Checklist of the land and freshwater Gastropoda of Europe. Last update: July 16th, 2017.
Gofas, S. 2001. The systematics of Pyrenean and Cantabrian Cochlostoma (Gastropoda, Cyclophoroidea) revisited. Journal of Natural History 35(9): 1277-1369.
IUCN. 2011. IUCN Red List of Threatened Species (ver. 2011.1). Available at: http://www.iucnredlist.org. (Accessed: 30 June 2017).
IUCN. 2018. The IUCN Red List of Threatened Species. Version 2018-1. Available at: www.iucnredlist.org. (Accessed: 28 June 2018).
|Citation:||Fehér, Z. 2018. Obscurella bicostulata (amended version of 2011 assessment). The IUCN Red List of Threatened Species 2018: e.T170539A122551740.Downloaded on 22 July 2018.|
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