Aaadonta pelewana

Status_ne_offStatus_dd_offStatus_lc_offStatus_nt_offStatus_vu_offStatus_en_offStatus_cr_onStatus_ew_offStatus_ex_off

Taxonomy [top]

Kingdom Phylum Class Order Family
ANIMALIA MOLLUSCA GASTROPODA STYLOMMATOPHORA ENDODONTIDAE

Scientific Name: Aaadonta pelewana
Species Authority: Solem, 1976
Taxonomic Notes:


Assessment Information [top]

Red List Category & Criteria: Critically Endangered 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. & GarcĂ­a, N.
Facilitator/s: Pippard, H.
Justification:

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.






History:
1996 Data Deficient
1994 Vulnerable (Groombridge 1994)

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 No specimens were recovered in recent surveys of Palau (Rundell 2010, Rundell 2007, unpublished data).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:
Possibly extinct:
Palau
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).
Population Trend: Decreasing

Habitat and Ecology [top]

Habitat and Ecology:

This species was recorded from tropical most lowland forest.

Systems: Terrestrial

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.

Bibliography [top]

IUCN. 2012. IUCN Red List of Threatened Species (ver. 2012.2). Available at: http://www.iucnredlist.org. (Accessed: 17 October 2012).

Rundell, RJ. 2010. Diversity and conservation of the land snail fauna of the western Pacific islands of Belau (Republic of Palau, Oceania). American Malacological Bulletin 28: 81-90.

Solem, A. 1976. Endodontoid land snails from Pacific islands (Mollusca: Pulmonata: Sigmurethra). Part I. Family Endodontidae. Field Museum of Natural History, Chicago.

Solem, A. 1983. Endodontoid land snails from Pacific islands (Mollusca: Pulmonata: Sigmurethra). Part II. Families Punctidae and Charopidae. Zoogeography. Field Museum of Natural History, Chicago.

Citation: Rundell, R.J. 2012. Aaadonta pelewana. In: IUCN 2013. IUCN Red List of Threatened Species. Version 2013.2. <www.iucnredlist.org>. Downloaded on 20 April 2014.
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