Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Mollusca Gastropoda Stylommatophora Streptaxidae

Scientific Name: Edentulina moreleti
Species Authority: (Adams, 1868)

Assessment Information [top]

Red List Category & Criteria: Endangered B1ab(iii)+2ab(iii) ver 3.1
Year Published: 2009
Date Assessed: 2006-01-11
Assessor(s): Gerlach, J.
Reviewer(s): Miller, R.M., Pollock, C.M. & Seddon, M.B.
A very restricted species, this snail has an EOO of 5 km² and an AOO of 4 km², and is known from only 2 locations. Within this limited range, invasion by Cinnamomum verum plants is an ongoing threat, resulting in habitat degradation.

Geographic Range [top]

Range Description: This snail species is endemic to the Seychelles islands of Mahé and Silhouette, and is found in an elevational band from 540-600 metres above sea level. Its area of occupancy (AOO) is estimated to be only 4 km², while its extent of occurrence (EOO) is only 5 km².  However, E. moreleti was last recorded on Mahé in 1972, despite surveys looking for this species since then, it has not been found. 
Countries occurrence:
Seychelles (Seychelles (main island group))
Estimated area of occupancy (AOO) - km2: 4
Continuing decline in area of occupancy (AOO): No
Extreme fluctuations in area of occupancy (AOO): No
Estimated extent of occurrence (EOO) - km2: 5
Continuing decline in extent of occurrence (EOO): No
Extreme fluctuations in extent of occurrence (EOO): No
Number of Locations: 2
Continuing decline in number of locations: No
Extreme fluctuations in the number of locations: No
Lower elevation limit (metres): 540
Upper elevation limit (metres): 600
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: The population was estimated at 84,000 individuals in 2005.
Current Population Trend: Stable
Additional data:
Number of mature individuals: 84000 Continuing decline of mature individuals: No
Extreme fluctuations: No Population severely fragmented: No
Continuing decline in subpopulations: No
Extreme fluctuations in subpopulations: No All individuals in one subpopulation: No

Habitat and Ecology [top]

Habitat and Ecology: Restricted to high forests from 540-600 m, this snail is found in the axils of Dracaena reflexa and Pandanus hornei plants. It is the only streptaxid known to be herbivorous, feeding on algae and detritus. An ovoviviparous species, it produces eggs but retains them inside the female's body until hatching occurs.
Systems: Terrestrial
Continuing decline in area, extent and/or quality of habitat: Yes

Threats [top]

Major Threat(s): This snail is threatened by habitat deterioration, caused in the past by small-scale wood plantations and currently caused by invasion by Cinnamomum verum plants.

Conservation Actions [top]

Conservation Actions: No conservation actions are in place. Legal protection of Silhouette island is required to protect the main popualtion.

Citation: Gerlach, J. 2009. Edentulina moreleti. The IUCN Red List of Threatened Species 2009: e.T168142A6459016. . Downloaded on 06 October 2015.
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