Samoana attenuata

Taxonomy

Assessment Information

Geographic Range

Population

Habitat and Ecology

Threats

Conservation Actions

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Taxonomy [top]

Kingdom	Phylum	Class	Order	Family
ANIMALIA	MOLLUSCA	GASTROPODA	STYLOMMATOPHORA	PARTULIDAE

Scientific Name:

Samoana attenuata

Species Authority:

Pease, 1864

Common Name/s:

English

–

Polynesian Tree Snail

Synonym/s:

Partula attenuata

Samoana solitaria Crampton

Taxonomic Notes:

Recorded as Partula solitaria on Moorea by Crampton (1932) but reclassified by Kondo (1968). High altitude populations of S. attenuata turned out to be S. burchi (Ó. Foighi pers. comm.).

Assessment Information [top]

Red List Category & Criteria:

Critically Endangered A2e; B2ab(ii,iv) ver 3.1

Year Published:

2009

Assessor/s:

Coote, T.

Reviewer/s:

Cowie, R. & Seddon, M.

Contributor/s:

Justification:
The introduction of the carnivorous snail Euglandina rosea onto all the Society Islands has impacted on the on the distribution. No live individuals were found in intensive surveys on Bora Bora in 1991, or on Raiatea in 2000. A small population was found on Moorea in 1996 and a few small populations on Tahiti during the surveys of 2003-2005. A few individuals were found on Raiatea in 2006.

History:

1996	–	Endangered
1994	–	Endangered (Groombridge 1994)

Geographic Range [top]

Range Description:	Extant on Tahiti, Moorea and Raiatea, Society Islands. Extinct on Bora Bora.
Countries:	Native: French Polynesia (Society Is.)
Range Map:	Click here to open the map viewer and explore range.

Population [top]

Population:	This species is notoriously elusive but certainly very rare in lowland Tahiti and slopes of Moorea. One individual recently was discovered on the highest point of Raiatea.
Population Trend:	Decreasing

Habitat and Ecology [top]

Habitat and Ecology:	The snail has a preference for higher branches in trees and often drier ridges. However, it is also found in at least one wet valley of Tahiti.
Systems:	Terrestrial

Threats [top]

Major Threat(s):	Euglandina rosea remains the principal threat. The intrinsic problems of small population size are also a danger but it is likely that this species has always existed in low densities.

Major Threat(s):

Euglandina rosea remains the principal threat. The intrinsic problems of small population size are also a danger but it is likely that this species has always existed in low densities.

Conservation Actions [top]

Conservation Actions:	In-situ management. Does not appear to survive in ex-situ breeding colonies.

Conservation Actions:

In-situ management. Does not appear to survive in ex-situ breeding colonies.

Citation:	Coote, T. 2009. Samoana attenuata. In: IUCN 2012. IUCN Red List of Threatened Species. Version 2012.2. <www.iucnredlist.org>. Downloaded on 24 May 2013.
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