Aaadonta pelewana 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Mollusca Gastropoda Stylommatophora Endodontidae

Scientific Name: Aaadonta pelewana Solem, 1976
Taxonomic Notes:

Assessment Information [top]

Red List Category & Criteria: Critically Endangered (Possibly Extinct) D ver 3.1
Year Published: 2012
Date Assessed: 2011-08-22
Assessor(s): Rundell, R.J.
Reviewer(s): Barker, G., Cowie, R., Triantis, K. & García, N.
Facilitator/Compiler(s): Pippard, H.

No specimens of this species have been found recently, despite surveys of Palauan islands in 2003, 2005 and 2007. The species was previously known only from Peleliu and Koror and several unspecified locations in Palau (Solem 1976). It is listed as Critically Endangered (Possibly Extinct) as it is believed that it may be extirpated from its historically known distribution, and only seven individuals were ever known. Additional surveys of the island are urgently needed to verify whether the species is in fact Extinct.

Previously published Red List assessments:

Geographic Range [top]

Range Description:

The historical geographic range of this species is unknown, due to several collections from unspecified Palau islands, but included the islands of Koror (Oreor) and Peleliu (Beliliou) which have an areas less than 19 km2 (Solem 1976). No specimens were recovered in recent surveys of Palau (Rundell 2010, Rundell 2007, unpublished data).

Countries occurrence:
Possibly extinct:
Additional data:
Estimated area of occupancy (AOO) - km2:0-10
Lower elevation limit (metres):1
Upper elevation limit (metres):200
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:This is a minute ground-dwelling snail for which no specimens have been found recently, despite surveys of the islands in 2003, 2005 and 2007 (Rundell 2010). The species was previously known only from Peleliu and Koror, and was described based on seven museum specimens, all of which were collected prior to World War II (Solem 1976).
Current Population Trend:Decreasing
Additional data:
Number of mature individuals:0-49

Habitat and Ecology [top]

Habitat and Ecology:

This species was recorded from tropical most lowland forest.

Continuing decline in area, extent and/or quality of habitat:Yes

Use and Trade [top]

Use and Trade: This species is not utilized.

Threats [top]

Major Threat(s):

Destruction and modification of native lowland forest is a major threat to this species. Therefore, it is not surprising that the species has probably been extirpated from the highly modified islands of Koror and Peleliu. Disruption of the ground, rocks and leaf litter may be of particular significance to this and other endodontid species. Endodontoid land snails are among the most threatened land snails on Pacific Islands in the few places where they still exist (Solem 1983).

Conservation Actions [top]

Conservation Actions:

This species is not protected. Additional surveys of the islands are needed to verify whether the species is in fact Extinct.

Citation: Rundell, R.J. 2012. Aaadonta pelewana. The IUCN Red List of Threatened Species 2012: e.T8A3148704. . Downloaded on 25 September 2018.
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