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Palaina albata

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Taxonomy [top]

Kingdom Phylum Class Order Family
ANIMALIA MOLLUSCA GASTROPODA ARCHITAENIOGLOSSA DIPLOMMATINIDAE

Scientific Name: Palaina albata
Species Authority: (Beddome, 1889)

Assessment Information [top]

Red List Category & Criteria: Critically Endangered B1ab(ii,iii)+2ab(ii,iii) ver 3.1
Year Published: 2012
Date Assessed: 2011-08-22
Assessor(s): Rundell, R.J.
Reviewer(s): Cowie, R., Barker, G., Triantis, K., García, N. & Pippard, H.
Justification:

This species was not found alive during extensive surveys of Palau in 2003, 2005 or 2007: only two dead shells were found on a single island in 2003. This species is listed as Critically Endangered (Possibly Extinct) due to its very narrow range and area of occupancy (1 km2), the single location, and the known continuing decline in the extent and quality of its habitat. The species has not been collected alive since 1936, suggesting that it is Possibly Extinct. Further surveys are urgently required in order to determine whether this species is still extant.

History:
1996 Data Deficient
1994 Vulnerable (Groombridge 1994)

Geographic Range [top]

Range Description:

This species was previously known only from the island of Koror (Oreor) in Palau (Y. Kondo 1936 unpublished data, Beddome 1889), giving an historical geographic range of less than 20 km2. Current data suggest that the species has been extirpated from Koror. However, two dead shells were found on a neighboring minute (less than 1 km2) Rock Island (Ngkesill) during 2003 surveys (Rundell 2005). Therefore, the inferred area of occupancy for this species is 1 km2 represented by the single location on Ngkesil. The species has not been collected alive since 1936.

Countries:
Possibly extinct:
Palau
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: There is no population information available
Population Trend: Unknown

Habitat and Ecology [top]

Habitat and Ecology: This is a ground-dwelling species that has been recorded from moist lowland tropical forest.
Systems: Terrestrial

Use and Trade [top]

Use and Trade: This species is not utilized.

Threats [top]

Major Threat(s):

This species was (or is) threatened by destruction and modification of native lowland forest. Much of the native forest within its range has been destroyed or substantially modified by human habitation, the impacts of which significantly accelerated on Koror in the World War II and post-WWII era. Bombing-induced destruction probably also negatively impacted available habitats on Koror (Crombie and Pregill 1999).

Conservation Actions [top]

Conservation Actions:

Field work to define the current distribution of this species, as well as research on its population status and trends, is required. Identification of priority sites for species conservation (e.g. key biodiversity areas that include threatened land snails) and reducing the impacts of human activities, especially on the small islands, is also urgently needed. The Palau Conservation Society has been supportive of recent land snail survey work in Palau.


Citation: Rundell, R.J. 2012. Palaina albata. The IUCN Red List of Threatened Species. Version 2014.3. <www.iucnredlist.org>. Downloaded on 24 November 2014.
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