Pachnodus becketti 

Scope: Global
Language: English

Translate page into:

Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Mollusca Gastropoda Stylommatophora Cerastidae

Scientific Name: Pachnodus becketti Gerlach, 1994

Assessment Information [top]

Red List Category & Criteria: Endangered B1ab(iii)+2ab(iii) ver 3.1
Year Published: 2009
Date Assessed: 2006-01-11
Needs updating
Assessor(s): Gerlach, J.
Reviewer(s): Miller, R.M., Pollock, C.M. & Seddon, M.B.
This species has a restricted range (EOO = 10 km²; AOO = 6 km²; found in 4 locations), throughout which habitat degradation caused by invasive plant species (e.g., Cinnamomum verum) is ongoing. The severity of the effects of such degradation on this species is unknown; fortunately, populations are currently stable.

Geographic Range [top]

Range Description:This terrestrial snail is endemic to Mahé island, in the Seychelles. Its extent of occurrence (EOO) is estimated to be 10 km² and its area of occupancy (AOO) is 6 km².
Countries occurrence:
Seychelles (Seychelles (main island group))
Additional data:
Estimated area of occupancy (AOO) - km2:6Continuing decline in area of occupancy (AOO):No
Extreme fluctuations in area of occupancy (AOO):NoEstimated extent of occurrence (EOO) - km2:10
Continuing decline in extent of occurrence (EOO):NoExtreme fluctuations in extent of occurrence (EOO):No
Number of Locations:4Continuing decline in number of locations:No
Extreme fluctuations in the number of locations:NoLower elevation limit (metres):250
Upper elevation limit (metres):600
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:In 2005, the population was estimated to consist of 50,500 adults.
Current Population Trend:Stable
Additional data:
Number of mature individuals:50500Continuing 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 snail is an arboreal species, found in high forest from 250-600 m.
Continuing decline in area, extent and/or quality of habitat:Yes
Generation Length (years):2

Threats [top]

Major Threat(s): Small scale wood plantations threatened the species' habitat in the past, but are no longer considered a threat. However, this snail is still vulnerable to ongoing habitat degradation across its range, caused by invasive non-native species (e.g., Cinnamomum verum).

Conservation Actions [top]

Conservation Actions: No conservation measures are in place for this species. The La Reserve-Brullee area of Mahé should be protected, and invasive plant species must be controlled.

Citation: Gerlach, J. 2009. Pachnodus becketti. The IUCN Red List of Threatened Species 2009: e.T168115A6452824. . Downloaded on 22 January 2018.
Disclaimer: To make use of this information, please check the <Terms of Use>.
Feedback: If you see any errors or have any questions or suggestions on what is shown on this page, please provide us with feedback so that we can correct or extend the information provided