Post by surroundx on Jan 25, 2015 8:20:12 GMT
Scientific Name: Hemicycla efferata
Species Authority: (Mousson, 1872)
Assessment Information [top]
Red List Category & Criteria: Critically Endangered B1ab(iii)+2ab(iii) ver 3.1
Year Published: 2013
Date Assessed: 2011-03-24
Assessor(s): Groh, K.
Reviewer(s): Neubert, E., Temple, H.J. & Cuttelod, A.
Justification:
This species is endemic to La Gomera, where it is known from a single location. It is suspected to be declining as a result of overgrazing and rat predation. Consequently it is assessed as Critically Endangered (CR) B1ab(iii)+2ab(iii).
Geographic Range [top]
Range Description:
This species is endemic to La Gomera. It was described without location data, and rediscovered by R. Hutterer in the 1990s. It is known from one site (one location) in the north-east part of the island, and its area of occupancy and extent of occurrence are inferred to be 4 km².
Countries:
Native:
Spain (Canary Is.)
Range Map: Click here to open the map viewer and explore range.
Population [top]
Population: The population size and trend are not known for this species. Based on findings of several dead shells and subfossil shells in the environment, as well as many in Quaternary deposits, it would appear that the species is declining.
Population Trend: Decreasing
Habitat and Ecology [top]
Habitat and Ecology: The species is found in abandoned cultivated area with rocks.
Systems: Terrestrial
Use and Trade [top]
Use and Trade: This species is not used.
Threats [top]
Major Threat(s): Significant threats to the species include overgrazing by goats and predation by rats.
Conservation Actions [top]
Conservation Actions: The single site where the species is known to occur is not protected. Monitoring is needed, and measures to address the threats posed by overgrazing and rat predation may be needed.
Citation: Groh, K. 2013. Hemicycla efferata. The IUCN Red List of Threatened Species. Version 2014.3. <www.iucnredlist.org>. Downloaded on 25 January 2015.
Source:
www.iucnredlist.org/details/156766/0
Species Authority: (Mousson, 1872)
Assessment Information [top]
Red List Category & Criteria: Critically Endangered B1ab(iii)+2ab(iii) ver 3.1
Year Published: 2013
Date Assessed: 2011-03-24
Assessor(s): Groh, K.
Reviewer(s): Neubert, E., Temple, H.J. & Cuttelod, A.
Justification:
This species is endemic to La Gomera, where it is known from a single location. It is suspected to be declining as a result of overgrazing and rat predation. Consequently it is assessed as Critically Endangered (CR) B1ab(iii)+2ab(iii).
Geographic Range [top]
Range Description:
This species is endemic to La Gomera. It was described without location data, and rediscovered by R. Hutterer in the 1990s. It is known from one site (one location) in the north-east part of the island, and its area of occupancy and extent of occurrence are inferred to be 4 km².
Countries:
Native:
Spain (Canary Is.)
Range Map: Click here to open the map viewer and explore range.
Population [top]
Population: The population size and trend are not known for this species. Based on findings of several dead shells and subfossil shells in the environment, as well as many in Quaternary deposits, it would appear that the species is declining.
Population Trend: Decreasing
Habitat and Ecology [top]
Habitat and Ecology: The species is found in abandoned cultivated area with rocks.
Systems: Terrestrial
Use and Trade [top]
Use and Trade: This species is not used.
Threats [top]
Major Threat(s): Significant threats to the species include overgrazing by goats and predation by rats.
Conservation Actions [top]
Conservation Actions: The single site where the species is known to occur is not protected. Monitoring is needed, and measures to address the threats posed by overgrazing and rat predation may be needed.
Citation: Groh, K. 2013. Hemicycla efferata. The IUCN Red List of Threatened Species. Version 2014.3. <www.iucnredlist.org>. Downloaded on 25 January 2015.
Source:
www.iucnredlist.org/details/156766/0