Beddomeia tumida

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	LITTORINIMORPHA	HYDROBIIDAE

Scientific Name:	Beddomeia tumida
Species Authority:	Petterd, 1889
Synonym/s:	Beddomeia launcestonensis subspecies tumida Petterd, 1889 Beddomeia tumida Smith, 1992 Tasmaniella tumida Iredale, 1943
Taxonomic Notes:	It is likely that there are more Beddomeia taxa in Tasmania and the Australian state of Victoria than are currently classified (Ponder et al. 1993). The order may be Neotaenioglossa (Inland Fisheries Service 2004).

Assessment Information [top]

Red List Category & Criteria:

Critically Endangered D ver 3.1

Year Published:

2011

Assessor/s:

Clark, S.

Reviewer/s:

Böhm, M. & Collen, B.

Contributor/s:

Dyer, E., Soulsby, A.-M., Whitton, F., McGuinness, S., De Silva, R., Milligan, H.T., Kasthala, G., Herdson, R., Thorley, J., McMillan, K. & Collins, A.

Justification:
Beddomeia tumida has been assessed as Critically Endangered (Possibly Extinct) because no specimens have been collected since the 1920s, when the lake was flooded for a hydroelectric project. However, further survey work is required to ascertain whether this species is now Extinct or whether it persists in the sublittoral zone of the lake.

History:

1996	–	Extinct
1994	–	Endangered (Groombridge 1994)

Geographic Range [top]

Range Description:	This species has been found in the Great Lake in Tasmania, Australia (Ponder et al. 1993, W. Ponder pers. comm. 2011). Its estimated extent of occurrence is approximately 465 km².
Countries:	Possibly extinct: Australia (Tasmania)
Range Map:	Click here to open the map viewer and explore range.

Population [top]

Population:	This species has not been collected in the lake or surrounding areas since it was dammed and flooded for hydroelectric work in the 1920s (Ponder et al. 1993). Attempts to collect this species on the margins of the lake and in streams flowing into it have failed to locate it and it may now be Extinct, unless it still survives in the sublittoral areas (Ponder 1996).
Population Trend:	Unknown

Habitat and Ecology [top]

Habitat and Ecology:	This species inhabits lakes, and is morphologically similar to B. inflata and B. wilmotensis (Ponder et al. 1993).
Systems:	Freshwater

Threats [top]

Major Threat(s):	The greatest threat experienced by this species was the flooding of the Great Lake for hydroelectric work in the 1920s. This may have caused the extinction of this species (Ponder et al. 1993).

Major Threat(s):

The greatest threat experienced by this species was the flooding of the Great Lake for hydroelectric work in the 1920s. This may have caused the extinction of this species (Ponder et al. 1993).

Conservation Actions [top]

Conservation Actions:	This species was previously assessed as Extinct in 1996 (version 2.3), and currently it is classified as Endangered under Tasmania's Threatened Species Protection Act 1995 (DPIPWE 2009). Further investigations are needed to establish if this species is still surviving (Ponder 1996).

Conservation Actions:

This species was previously assessed as Extinct in 1996 (version 2.3), and currently it is classified as Endangered under Tasmania's Threatened Species Protection Act 1995 (DPIPWE 2009). Further investigations are needed to establish if this species is still surviving (Ponder 1996).

Citation:	Clark, S. 2011. Beddomeia tumida. In: IUCN 2012. IUCN Red List of Threatened Species. Version 2012.2. <www.iucnredlist.org>. Downloaded on 19 June 2013.
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