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Punctum seychellarum 

Scope: Global
Language: English
Status_ne_offStatus_dd_offStatus_lc_offStatus_nt_offStatus_vu_onStatus_en_offStatus_cr_offStatus_ew_offStatus_ex_off

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Mollusca Gastropoda Stylommatophora Punctidae

Scientific Name: Punctum seychellarum Gerlach, 1998

Assessment Information [top]

Red List Category & Criteria: Vulnerable B1ab(iii)+2ab(iii); D2 ver 3.1
Year Published: 2009
Date Assessed: 2006-01-11
Annotations:
Needs updating
Assessor(s): Gerlach, J.
Reviewer(s): Miller, R.M., Pollock, C.M. & Seddon, M.
Justification:
Although population densities are high and the populations are stable, this species has a restricted range and populations are vulnerable to habitat deterioration. Such deterioration is ongoing, caused by invasive plant species such as Cinnamomum verum. This snail's EOO has been estimated to measure 300 km² and its AOO is estimated at 25 km². It is found in 6 locations.

Geographic Range [top]

Range Description:Endemic to Seychelles islands, and found only on Mahé and Silhouette islands, this species has an extent of occurrence (EOO) of 300 km² and an area of occupancy (AOO) of 25 km².
Countries occurrence:
Native:
Seychelles (Seychelles (main island group))
Additional data:
Estimated area of occupancy (AOO) - km2:25Continuing decline in area of occupancy (AOO):No
Extreme fluctuations in area of occupancy (AOO):NoEstimated extent of occurrence (EOO) - km2:300
Continuing decline in extent of occurrence (EOO):NoExtreme fluctuations in extent of occurrence (EOO):No
Number of Locations:6Continuing decline in number of locations:No
Extreme fluctuations in the number of locations:NoLower elevation limit (metres):500
Upper elevation limit (metres):900
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:The population was estimated at over 3 million individuals in 2005.
Current Population Trend:Stable
Additional data:
Number of mature individuals:3000000Continuing decline of mature individuals:No
Extreme fluctuations:NoPopulation severely fragmented:No

Habitat and Ecology [top]

Habitat and Ecology:Restricted to high forest from 500-900 m, this species is found in leaf litter on the ground and in epiphytes.
Systems:Terrestrial
Continuing decline in area, extent and/or quality of habitat:Yes

Threats [top]

Major Threat(s): This snail is threatened by habitat degradation caused by invasive alien plant species (e.g., Cinnamomum verum).

Conservation Actions [top]

Conservation Actions: This species is present at low densities in Morne Seychellois National Park. The main population on Silhouette island should be protected, and invasive species should be controlled throughout the Seychelles islands. Research is needed into the species' life history and ecology.

Citation: Gerlach, J. 2009. Punctum seychellarum. The IUCN Red List of Threatened Species 2009: e.T168130A6456447. . Downloaded on 23 September 2017.
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