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Pachnodus ornatus 

Scope: Global
Language: English
Status_ne_offStatus_dd_offStatus_lc_offStatus_nt_offStatus_vu_offStatus_en_onStatus_cr_offStatus_ew_offStatus_ex_off

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Mollusca Gastropoda Stylommatophora Cerastidae

Scientific Name: Pachnodus ornatus (Dufo, 1840)

Assessment Information [top]

Red List Category & Criteria: Endangered 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 has a restricted distribution (EOO = 15 km²; AOO = 12 km²; 4 locations), and invasive exotic plant species are causing habitat deterioration throughout its range. Within this area populations are stable but vulnerable to further habitat deterioration.

Geographic Range [top]

Range Description:This snail is endemic to Mahé island, in the Seychelles. It's extent of occurence (EOO) is estimated to be 15 km² and its area of occupancy (AOO) is 12 km².
Countries occurrence:
Native:
Seychelles (Seychelles (main island group))
Additional data:
Estimated area of occupancy (AOO) - km2:12Continuing decline in area of occupancy (AOO):No
Extreme fluctuations in area of occupancy (AOO):NoEstimated extent of occurrence (EOO) - km2:15
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:An estimated 101,000 individuals were recorded in 2005.
Current Population Trend:Stable
Additional data:
Number of mature individuals:101000Continuing decline of mature individuals:No
Extreme fluctuations:NoPopulation severely fragmented:No

Habitat and Ecology [top]

Habitat and Ecology:An arboreal species, this snail can be found in high forest and palm forest, from 250-600 m.
Systems:Terrestrial
Continuing decline in area, extent and/or quality of habitat:Yes
Generation Length (years):2

Threats [top]

Major Threat(s): Currently, the main threat to this snail species is habitat degradation caused by impacts from invasive exotic species (e.g., Cinnamomum verum). Small-scale wood plantations have caused habitat degradation in the past.

Conservation Actions [top]

Conservation Actions: There are currently no conservation measures in place for this species. The La Reserve-Brullee area of Mahé should be protected. Invasive species must be controlled throughout the Seychelles.

Citation: Gerlach, J. 2009. Pachnodus ornatus. The IUCN Red List of Threatened Species 2009: e.T168113A6452090. . Downloaded on 24 September 2017.
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