Gomphus lynnae

Taxonomy

Assessment Information

Geographic Range

Population

Habitat and Ecology

Threats

Conservation Actions

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Taxonomy [top]

Kingdom	Phylum	Class	Order	Family
ANIMALIA	ARTHROPODA	INSECTA	ODONATA	GOMPHIDAE

Scientific Name:

Gomphus lynnae

Species Authority:

Paulson, 1983

Common Name/s:

English

–

Columbia Clubtail

Synonym/s:

Gomphurus lynnae (Paulson, 1983)

Taxonomic Notes:

Transferred from the genus Gomphurus to Gomphus as the former is now a subgenus.

Assessment Information [top]

Red List Category & Criteria:

Endangered B1ab(iii,v) ver 3.1

Year Published:

2007

Assessor/s:

Abbott, J.C.

Reviewer/s:

Donnelly, N., Suhling, F. & Clausnitzer, V. (Odontata Red List Authority)

Contributor/s:

Justification:
This species is known from only five counties in two US states. Populations at the Yakima River, the only Washington site, have declined. Populations at the only two Oregon rivers which it is known seem to be stable. But threats including dams, carp and introduced predators are impacting this species. There probably are thousands of individuals in each of the three rivers where known. Only five populations are known, one on the Yakima River (Benton Co.) in Washington, one on the Owyhee River (Malheur Co.) in Oregon, and three on the John Day River system (Grant Co.) in Oregon. The rivers on which it occurs are rather different habitats, so it should occur over a range of river systems, including in Idaho, but not found elsewhere in region yet. Not known to have declined in the Yakima for 31 years and the John Day for four years since discovery. Recent discovery of specimens in the Oregon State University Entomology Collection date occurrence of this species in the Owyhee River, Rome, Oregon, back 19 years before the species was "discovered" on the Yakima River, Washington; and 46 years before it was known to occur in the Owyhee River basin (Johnson 2002). Extent of occurrence is less than 5,000 km².

History:

1996	–	Endangered
1996	–	Endangered
1994	–	Rare (Groombridge 1994)
1990	–	Rare (IUCN 1990)

Geographic Range [top]

Range Description:	Endemic to the United States. Known from five counties within the states of Oregon and Washington.
Countries:	Native: United States (Oregon, Washington)
Range Map:	Click here to open the map viewer and explore range.

Population [top]

Population:	Current population size is unknown.
Population Trend:	Decreasing

Habitat and Ecology [top]

Habitat and Ecology:	Open rivers with mud and gravel among rocks (Dunkle 2002). Probably more stable in Oregon than in Washington.
Systems:	Terrestrial; Freshwater

Threats [top]

Major Threat(s):	Very limited known range. One of three known occurrences is a river in an arid agricultural area with many uses/impacts.

Major Threat(s):

Very limited known range. One of three known occurrences is a river in an arid agricultural area with many uses/impacts.

Conservation Actions [top]

Conservation Actions:	No protection whatsoever in the three river stretches where it occurs.

Conservation Actions:

No protection whatsoever in the three river stretches where it occurs.

Citation:	Abbott, J.C. 2007. Gomphus lynnae. In: IUCN 2012. IUCN Red List of Threatened Species. Version 2012.2. <www.iucnredlist.org>. Downloaded on 19 June 2013.
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