Liphistius kanthan 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Arthropoda Arachnida Araneae Liphistiidae

Scientific Name: Liphistius kanthan Platnick in Platnick, Schwendinger & Steiner, 1997
Common Name(s):
English Kanthan Cave Trapdoor Spider
Taxonomic Source(s): Platnick, N.I., Schwendinger, P.J. and Steiner, H. 1997. Three new species of the spider genus Liphistius (Araneae, Mesothelae) from Malaysia. American Museum Novitates (New York) 3209: 1-13.

Assessment Information [top]

Red List Category & Criteria: Critically Endangered B1ab(i,ii,iii,iv,v)+2ab(i,ii,iii,iv,v) ver 3.1
Year Published: 2013
Date Assessed: 2013-05-24
Assessor(s): Whitten, T., Clements, R. & Price, L.
Reviewer(s): Gerlach, J. & Marusik, Y.
The Kanthan Cave Trapdoor Spider meets the criteria for listing as Critically Endangered because its extent of occurrence (EOO) and area of occupancy (AOO) are well under 4 km² (this is a maximum estimate for EOO and AOO based on the recommended grid size of 2x2 km), it is known from a single location and there is a potential threat of quarrying, which when it happens, will result in a continuing decline in extent of occurrence, area of occupancy, extent and quality of habitat, number of subpopulations and number of mature individuals. The estimates of actual EOO and AOO are much smaller, being 0.014 km² and 0.003 km² respectively.
Previously published Red List assessments:

Geographic Range [top]

Range Description:This species is known from a single cave situated in a limestone hill named Gunung Kanthan, at 4°45.685'N, 101°07.322'E, Perak State, Malaysia. A survey in 2001 showed that the cave was 435 m long (see Figure 1 in the attached PDF). The cave is up to about 40 m high. A large entrance, rather high up the hill, slopes down into a more constricted passage leading into a large chamber with an opening overhead. The chamber gradually becomes smaller and leads to an exit. A meandering stream has cut into the cave floor, but the water appears to be stagnant. In this cave, all the specimens are found in nests on the cave walls (Platnick et al. 1997; Price 1998, 2011, Murphy and Murphy 2000) but only in one part of the main chamber (L. Price pers. comm. 2013). The cave lies between 125 and 135 m above sea level. On another limestone hill in the area, Gunung Tempurung, another species of Liphistius is found (Platnick et al. 1997, L. Price pers. comm. 2015).
For further information about this species, see 46534481_Liphistius_kanthan.pdf.
A PDF viewer such as Adobe Reader is required.
Countries occurrence:
Malaysia (Peninsular Malaysia)
Additional data:
Estimated area of occupancy (AOO) - km2:4Continuing decline in area of occupancy (AOO):Yes
Estimated extent of occurrence (EOO) - km2:4
Continuing decline in extent of occurrence (EOO):Yes
Number of Locations:1Continuing decline in number of locations:Yes
Lower elevation limit (metres):125
Upper elevation limit (metres):135
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:No estimate of the population size has been made and the current population trend is not known.
Current Population Trend:Unknown
Additional data:
Continuing decline of mature individuals:Yes
Population severely fragmented:No
Continuing decline in subpopulations:Yes
All individuals in one subpopulation:Yes

Habitat and Ecology [top]

Habitat and Ecology:Liphistius kanthan builds its nest on the cave wall or floor and camouflages it with mud and dirt. The front door of the nest is a trapdoor with 6-8 signal threads or trip wires radiating out. The spider waits with one leg on each thread, and if prey trips the wire, the spider rushes out, catches the victim and runs home slamming the door. If, however, the prey turns out to be an enemy, the spider can escape by means of a back door. After mating the female hangs an egg sac below her nest. The juveniles leave this sac and make their own nests (Platnick et al. 1997, Price 2011).
Continuing decline in area, extent and/or quality of habitat:Yes

Use and Trade [top]

Use and Trade: The species is not used or traded.

Threats [top]

Major Threat(s): The major threat is the limestone quarrying of the site by Lafarge Malaya planned for 2013 (Price 2012) which has already eliminated the northern two-thirds of what was once a two-peaked hill. The southern part of the hill is the part with the cave and it is within their permitted concession. Press reports in 2013 indicated that Lafarge Malaya would start quarrying the hill in June 2013 but the company headquarters said that it is unlikely to start for up to 18 months (i.e. early 2015.). Given that the extent of small fissures is unknown, not only is the actual extent of this spider within the cave system unknown but also the risks of the humidity, air flow and light within the cave cannot be estimated and so the impacts of even a single blasting of the external rock cannot be assessed – but is likely to be disastrous.

Conservation Actions [top]

Conservation Actions: There are no conservation actions in place. The most effective feasible action is the protection of this last, unquarried section of Gunung Kanthan and/or the legal protection of the species. Approaches to protect the site have been made recently to the Malaysian National Heritage Office in part because of the presence of temples at the mouth of the cave, but also because of the presence of this spider.

Citation: Whitten, T., Clements, R. & Price, L. 2013. Liphistius kanthan. The IUCN Red List of Threatened Species 2013: e.T46534481A76124022. . Downloaded on 25 September 2018.
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