Cochlostoma scalarinum 

Scope: Europe
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Mollusca Gastropoda Architaenioglossa Diplommatinidae

Scientific Name: Cochlostoma scalarinum (A. Villa & G.B. Villa, 1841)
Taxonomic Source(s): MolluscaBase. 2017. Available at:
Taxonomic Notes: According to Fauna Europaea, this species is comprised of two valid subspecies: C. scalarinum scalarinum and C. scalarinum hirci (Hirc, 1885).

Assessment Information [top]

Red List Category & Criteria: Least Concern (Regional assessment) ver 3.1
Year Published: 2011
Date Assessed: 2011-03-11
Assessor(s): Fehér, Z.
Reviewer(s): Neubert, E. & Ward, J.

This species lives within a wide range, there are several sub-populations and those which are regularly monitored do not show signs of any decline. Therefore this species is assessed as Least Concern (LC).

This species has also been assessed at the regional level as:
EU27 regional assessment: Least Concern (LC) at the level of the 27 member states of the European Union.
European regional assessment: Least Concern (LC).

Geographic Range [top]

Range Description:This species is distributed in the western Balkans along the Adriatic coastal zone from north-eastern Italy, Slovenia and Croatia southwards to Albania and the Ionian Islands (Korfu, Kefallonia). There are sporadic occurrences in the Peloponnes Peninsula. This species also has a remote sub-area in southern Italy (Calabria). (Wagner 1897, Wagner 1906, Stamol 2010, Maassen 1980, Fehér et al. 2001, Schütt 1977, Rähle 1980). Although there are no published records from Bosnia-Hercegovina, it is probable that it occurs in the Adriatic coastal part of that country too. An occurrence in Kosovo is proved by an unpublished record (collection of the Hungarian Natural History Museaum (HNHM): between Cakor pass and Pec). The area of occupancy is 100,000 km2 and the extent of occurrence is 500 km2.
Countries occurrence:
Albania; Croatia; Greece (Greece (mainland)); Italy (Italy (mainland)); Macedonia, the former Yugoslav Republic of; Montenegro; Serbia (Kosovo); Slovenia
Additional data:
Estimated area of occupancy (AOO) - km2:500Continuing decline in area of occupancy (AOO):No
Extreme fluctuations in area of occupancy (AOO):NoEstimated extent of occurrence (EOO) - km2:100000
Continuing decline in extent of occurrence (EOO):NoExtreme fluctuations in extent of occurrence (EOO):No
Number of Locations:100-150Continuing decline in number of locations:No
Extreme fluctuations in the number of locations:No
Upper elevation limit (metres):2250
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:Within its range, this species does not seem to be rare. There are at least 100-150 known sub-populations and those which were visited in recent years did not show signs of any decline. 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
Additional data:
Continuing decline of mature individuals:No
Extreme fluctuations:NoPopulation severely fragmented:No
Continuing decline in subpopulations:No
Extreme fluctuations in subpopulations:NoAll individuals in one subpopulation:No

Habitat and Ecology [top]

Habitat and Ecology:In the northern Adriatic part of its range, where it occurs in the coastal zone, this is an obligate rock-dweller, associated with limestone areas and usually found on the bare rock surface, in crevices or at the base of rocks. In Albania, however, this species lives farther from the coast among the mountains, and in this part of the range it inhabits forests and shrubs, where it is usually found among or under stones; among leaf litter in shaded places at the base of rocks or sometimes on the rock surface.
Continuing decline in area, extent and/or quality of habitat:No

Threats [top]

Major Threat(s): This species does not seems to be sensitive to ecosystem modification or other realistic threats. Local sub-populations could hypothetically be threatened by the complete or severe destruction of the vegetation (deforestation, etc.) in the southern part of the range. Considering the large extent of occurrence and the large number of sub-populations, local events do not affect the whole population significantly.

Conservation Actions [top]

Conservation Actions: This species is protected in Croatia. There are several sub-populations that live within protected areas. Although the sub-populations in southern Italy look morphologically identical to this species it should be confirmed or rejected by molecular methods too. The sub-populations in the southern part of the range (Albania, etc) are ecologically (in terms of habitat preference) different from the typical form. The systematic relevance of this difference should also be studied in the future. No conservation actions are currently required.

Citation: Fehér, Z. 2011. Cochlostoma scalarinum. The IUCN Red List of Threatened Species 2011: e.T170575A6792070. . Downloaded on 24 June 2018.
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