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Orcula fuchsi 

Scope: Global & Europe
Language: English
Status_ne_offStatus_dd_offStatus_lc_offStatus_nt_offStatus_vu_offStatus_en_offStatus_cr_onStatus_ew_offStatus_ex_off

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Mollusca Gastropoda Stylommatophora Orculidae

Scientific Name: Orcula fuchsi Zimmermann, 1931

Assessment Information [top]

Red List Category & Criteria: Critically Endangered B1ab(iii,v) ver 3.1
Year Published: 2011
Date Assessed: 2010-11-12
Assessor(s): Falkner, G., Falkner, M. & von Proschwitz, T.
Reviewer(s): Neubert, E., Ward, J. & Nichols, C.
Justification:
This species is endemic to Austria, where it is found in a very restricted range on the margin of the eastern Alps. Habitat destruction in the form of the afforestation of spruce trees has been identified as a major threat which is resulting in a decline in the population. The extent of occurrence (EOO) is just 35 km2, with an actual inhabited area of just 0.5 km2, and the six known localities are severely fragmented, with a continuing decline in the area of suitable habitat, the number of subpopulations and the number of mature individuals. Therefore this species is assessed as Critically Endangered (CR B1ab(iii,v)+2ab(iii,v)).
Previously published Red List assessments:

Geographic Range [top]

Range Description:The species is endemic to Austria, where it is found in a very restricted range on the margin of the eastern Alps.
Countries occurrence:
Native:
Austria
Additional data:
Estimated area of occupancy (AOO) - km2:24
Number of Locations:6
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:The exact population size of this species is not known. However, it is only known from six fragmented localities and the general trend is declining.
Current Population Trend:Decreasing
Additional data:
Continuing decline of mature individuals:Yes
Population severely fragmented:Yes

Habitat and Ecology [top]

Habitat and Ecology:This species is found in a mountainous-subalpine area, at the foot of steep calcareous rock walls and on grassy rock ledges.
Systems:Terrestrial
Continuing decline in area, extent and/or quality of habitat:Yes

Use and Trade [top]

Use and Trade: This species is not utilized.

Threats [top]

Major Threat(s): Threats have been identified as biotope destruction through the afforestation of spruce (Picea) trees.

Conservation Actions [top]

Conservation Actions: No conservation actions are currently in place for the species, although it is listed on the Austrian Red List (Reischütz and  Reischütz 2007) as Endangered (EN).
Habitat destruction in the form of the afforestation of spruce trees has been identified as a major threat which is resulting in a decline in the population. As there are only six known sites with an extent of occurrence (EOO) of just 35 km2 and area of occupancy (AOO) of just 0.5 km2, known sites require protecting from these activities to halt the decline. The creation of suitable habitats in the area to attempt to reverse the current trend is also proposed. Continuing the monitoring of the population size and trends is needed to accompany this.

Citation: Falkner, G., Falkner, M. & von Proschwitz, T. 2011. Orcula fuchsi. The IUCN Red List of Threatened Species 2011: e.T15447A4586462. . Downloaded on 26 September 2018.
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