Marmorana nebrodensis 

Scope: Global & Europe
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Mollusca Gastropoda Stylommatophora Helicidae

Scientific Name: Marmorana nebrodensis (Pirajno, 1842)
Taxonomic Notes: This is a polytypical species; in addition to the nominotypical subspecies, three further subspecies are listed in Fauna Europaea: M. m. castellana (Monterosato, 1892), M. n. impervia (Monterosato, 1892), and M. n. silvestrii (Cafici, 1885). The nominotypical subspecies has been defined by a lectotype designation by Giannuzzi-Savelli et al. (1986).

Assessment Information [top]

Red List Category & Criteria: Endangered B1ab(iii)+2ab(iii) ver 3.1
Year Published: 2011
Date Assessed: 2011-04-15
Assessor(s): Falkner, G., Falkner, M. & von Proschwitz, T.
Reviewer(s): Cuttelod, A. & Bilz, M.
The species has a restricted distribution with an extent of occurrence of 500 km² and an area of occupancy of 20 km². It occurs mostly in abundant populations, but the occurrence in very scattered isolated colonies constitutes a serious threat of sudden eradications by single events and quarrying, tourist and sportive use of the rocky biotopes are threatening this species. Therefore it qualifies as Endangered (EN B1ab(iii)+2ab(iii)).

Geographic Range [top]

Range Description:The species is endemic to Sicily, where it lives scattered in the Madonie mountains on calcareous rock outcrops and on rock walls around Pizzo Antenna. Near Rifugio Orestano exists a small hybrid population between M. n. nebrodensis and M. n. silvestrii (personal unpublished observation of the late K.-H. Beckmann). The subspecies M. n. castellana occurs largely disjunct on the Rocca Busambra, south of Palermo.
Countries occurrence:
Italy (Sicilia)
Additional data:
Estimated area of occupancy (AOO) - km2:20
Number of Locations:5
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:There are no data available. The population are generally abundant, but are considered as severely fragmented.
Current Population Trend:Unknown
Additional data:
Population severely fragmented:Yes

Habitat and Ecology [top]

Habitat and Ecology:The species lives scattered in the Madonie mountains on calcareous rock outcrops and on rock walls around Pizzo Antenna.
Continuing decline in area, extent and/or quality of habitat:Yes

Use and Trade [top]

Use and Trade: This species is not used.

Threats [top]

Major Threat(s): Quarrying, tourist and sportive use of the rocky biotopes are the main threats to this species.

Conservation Actions [top]

Conservation Actions: There are no conservation actions in place. Suggested conservation measures include protection of the habitat from quarrying, awareness and communications to people participating in mountain sports, and habitat and population monitoring.

Citation: Falkner, G., Falkner, M. & von Proschwitz, T. 2011. Marmorana nebrodensis. The IUCN Red List of Threatened Species 2011: e.T156464A4949207. . Downloaded on 23 September 2018.
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