Ceylonthelphusa cavatrix 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Arthropoda Malacostraca Decapoda Gecarcinucidae

Scientific Name: Ceylonthelphusa cavatrix (Bahir, 1998)
Taxonomic Notes: This species was formerly included in the Parathelphusidae but has recently been reassigned to the Gecarcinucidae; Parathelphusidae is now regarded as a junior synonym of Gecarcinucidae (Klause et al. in press).

Assessment Information [top]

Red List Category & Criteria: Endangered B1ab(iii)+2ab(iii) ver 3.1
Year Published: 2017
Date Assessed: 2008-01-01
Assessor(s): Esser, L.J. & Cumberlidge, N.
Reviewer(s): Darwall, W.R.T., Pollock, C.M. & McIvor, A.
Listed as Endangered because it is known from only three sites, its extent of occurrence and area of occupancy are 10 km², and although it is found in a protected area, this area is still subject to degradation from human impacts implying a continuing loss of habitat quality.
Previously published Red List assessments:

Geographic Range [top]

Range Description:Sri Lanka: Knuckles Mountains (Pathanegala near Puwakpitea, 07.33°N, 80.44°E, 10 km²) (Bahir 1998, Ng and Tay 2001). Conservation assessment of Bahir et al. (2005) indicates that it is present in three localities, other two locations not given.
Countries occurrence:
Sri Lanka
Additional data:
Estimated area of occupancy (AOO) - km2:<10
Number of Locations:3
Upper elevation limit (metres):1100
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:Abundance of the species at site of occurrence: rare
Current Population Trend:Unknown
Additional data:
Population severely fragmented:No

Habitat and Ecology [top]

Habitat and Ecology:Under moist stones and wet soil about 40 cm beneath ground level, at a small waterfall

Threats [top]

Major Threat(s): Habitat loss and pollution. Found in a protected area administered by Forest Department, but this PA is subject to degradation because of direct human impacts.

Conservation Actions [top]

Conservation Actions: No conservation measures are known to be in place for this species but it is found in a protected area.

Amended [top]

Amended reason: Replaced Old Threat Codes 1 Habitat Loss/Degradation (human induced) & 6 Pollution (affecting habitat and/or species) with New Threat Codes of 5.3.5. Biological resource use -> Logging & wood harvesting -> Motivation Unknown/Unrecorded & 9.1.3. Pollution -> Domestic & urban waste water -> Type Unknown/Unrecorded.

Citation: Esser, L.J. & Cumberlidge, N. 2017. Ceylonthelphusa cavatrix (amended version of 2008 assessment). The IUCN Red List of Threatened Species 2017: e.T61693A116618871. . Downloaded on 25 April 2018.
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