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Orcula schmidtii 

Scope: Europe
Language: English
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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Mollusca Gastropoda Stylommatophora Orculidae

Scientific Name: Orcula schmidtii (Küster, 1843)
Taxonomic Notes: According to Fauna Europaea and Hausdorf (1987) this species is comprised of two distinct subspecies: Orcula schmidtii schmidtii and O. schmidtii transversalis Westerlund, 1894.


Assessment Information [top]

Red List Category & Criteria: Least Concern (Regional assessment) ver 3.1
Year Published: 2011
Date Assessed: 2010-07-06
Assessor(s): Fehér, Z.
Reviewer(s): Neubert, E. & Ward, J.
Justification:

This species lives within a relatively wide range and there are at least 20 known subpopulations. Total destruction of the preferred habitat across the whole range is not very likely and local activities do not affect the whole species significantly. There is no reason to suppose that the extent of occurrence (EOO), area of occupancy (AOO), number of locations, number of subpopulations or the number of mature individuals are declining or extremely fluctuating. Therefore, it is assessed as Least Concern (LC).

This species has also been assessed at the regional level as:
European regional assessment: Least Concern (LC).
EU27 regional assessment: As there are probably more than 5 sub-populations in Greece, this species is also listed as Least Concern (LC) at the level of the 27 member states of the European Union.


Geographic Range [top]

Range Description:This species is distributed from Montenegro to nothwestern Greece. The type locality of the nominate subspecies is in Montenegro, near Cetinje. The type locality of O. schmidtii transversalis is Tsumerka [=Athamon Mts.]. Other published locations are: Anilion near Metsovon, Milea near Metsovon (Hausdorf 1987), Loutra near Amarandos (Reischütz and Sattmann 1990), five locations in North Albania (Dhora and Welter-Schultes 1996), Galicica Mountains, 1800 m (Gittenberger (1978). In the Mollusc collection of the HNHM there are a further 12 unpublished locations from Albania, but it might underestimates the real number of subpopulations.
In Albania it is not rare and therefore there is no reason to suppose that the extent of occurrence (EOO), area of occupancy (AOO) or the number of locations are declining or extremely fluctuating.
Countries occurrence:
Native:
Albania; Greece (Greece (mainland)); Macedonia, the former Yugoslav Republic of; Montenegro
Additional data:
Estimated area of occupancy (AOO) - km2:80Continuing decline in area of occupancy (AOO):No
Extreme fluctuations in area of occupancy (AOO):NoEstimated extent of occurrence (EOO) - km2:20000
Continuing decline in extent of occurrence (EOO):NoExtreme fluctuations in extent of occurrence (EOO):No
Number of Locations:20Continuing decline in number of locations:No
Extreme fluctuations in the number of locations:NoLower elevation limit (metres):750
Upper elevation limit (metres):1500
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:

Within its relatively large range, this species does not seem to be rare, therefore there is no reason to suppose that number of subpopulations 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:

This is neither an obligate rock-dweller nor a silvicol species, but generally associated with limestone areas where it lives in rocky forests or rocky shrublands. It is usually found in the crevices or at the base of rocks in shady and cooler sites, or under stones.

Systems:Terrestrial
Continuing decline in area, extent and/or quality of habitat:No

Threats [top]

Major Threat(s):

This species might be threatened by serious ecosystem modifications (which affect either the rocks or the vegetation in their habitats) such as through forestry, recreational activities and quarrying. However, total destruction of the preferred habitat across the whole range is not very likely, therefore local activities do not affect the whole species significantly.

Conservation Actions [top]

Conservation Actions:

The species is not protected at the national level in the countries where it occurs, however at least some of the known locations are within protected areas such as in the Park Kombetar Theth in Albania. Due to the distribution of this species and the stable population there are no conservation actions required at present.


Citation: Fehér, Z. 2011. Orcula schmidtii. The IUCN Red List of Threatened Species 2011: e.T156985A5025361. . Downloaded on 17 October 2017.
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