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Acanthennea erinacea 

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 Streptaxidae

Scientific Name: Acanthennea erinacea (Martens, 1898)

Assessment Information [top]

Red List Category & Criteria: Vulnerable B1ab(iii)+2ab(iii) 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.B.
Justification:
This species' restricted range (EOO = 300 km²; AOO = 25 km²; known from 10 locations), coupled with habitat degradation caused by invasive plant species, renders it vulnerable to extinction. Although this species is not tolerant of habitat degradation, at present it appears to be stable across its current range.

Geographic Range [top]

Range Description:Endemic to the Seychelles, this snail is found on Mahé and Silhouette islands. Its area of occupancy (AOO) has been estimated to measure 25 km² and its extent of occurrence (EOO) is 300 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:10Continuing decline in number of locations:No
Extreme fluctuations in the number of locations:NoLower elevation limit (metres):500
Upper elevation limit (metres):990
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:In 2005, the population was estimated to contain 90,000 individuals.
Current Population Trend:Stable
Additional data:
Number of mature individuals:90000Continuing decline of mature individuals:No
Extreme fluctuations:NoPopulation severely fragmented:No

Habitat and Ecology [top]

Habitat and Ecology:Restricted to high forest, this is a predatory species that feeds on small invertebrates (including arthropods).
Systems:Terrestrial
Continuing decline in area, extent and/or quality of habitat:Yes

Threats [top]

Major Threat(s): This species is vulnerable to habitat degradation. Currently, invasive species (e.g., Cinnamomum verum) which alter this snail's habitat are the principle threat. Small-scale wood plantations and farms have caused habitat degradation in the past.

Conservation Actions [top]

Conservation Actions: This species is present in Morne Seychellois National Park. The substantial populations on Silhouette island should also be protected.

Citation: Gerlach, J. 2009. Acanthennea erinacea. The IUCN Red List of Threatened Species 2009: e.T168135A6457523. . Downloaded on 24 September 2017.
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