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Tyrrheniberus ridens 

Scope: Global & Europe
Language: English
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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Mollusca Gastropoda Stylommatophora Helicidae

Scientific Name: Tyrrheniberus ridens (E. von Martens, 1884)

Assessment Information [top]

Red List Category & Criteria: Vulnerable B1ab(iii)+2ab(iii) ver 3.1
Year Published: 2011
Date Assessed: 2011-03-18
Assessor(s): Falkner, G., Falkner, M. & von Proschwitz, T.
Reviewer(s): Cuttelod, A. & Bilz, M.
Justification:
Tyrrheniberus ridens is a taxonomically well defined palaeoendemic species which is endemic to the island of Sardinia. It occurs only in a small part of the eastern coastal mountain range where it lives in isolated fragmented populations. Because of the restricted and fragmented area of occupancy this species is assessed as Vulnerable (VU) B1ab(iii)+2ab(iii).

Geographic Range [top]

Range Description:This specie is endemic to Sardinia (Italy). The species occurs only in the eastern coastal mountain chaine of Sardinia between the plains of Orosei and Tortoli. It is confined to calcareous places which are separated by deposits of vulcanic basalts. This species is recorded from 10 locations and 10 sites.
Countries occurrence:
Native:
Italy (Sardegna)
Additional data:
Estimated area of occupancy (AOO) - km2:40
Number of Locations:10
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:There is no information available on the population size or trend of this species.
Current Population Trend:Unknown
Additional data:
Population severely fragmented:No

Habitat and Ecology [top]

Habitat and Ecology:This species is a typical rock-dweller on limestone rocks in Mediterranean vegetation types.
Systems:Terrestrial
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): The major threat to this species is the road construction, which causes damage and fragmentation to the habitats. Tourist infrastructures and recreational activities like rock climbing add to the threats.

Conservation Actions [top]

Conservation Actions: There is no conservation action in place for this species.

Citation: Falkner, G., Falkner, M. & von Proschwitz, T. 2011. Tyrrheniberus ridens. The IUCN Red List of Threatened Species 2011: e.T156796A4998844. . Downloaded on 25 September 2018.
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