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Ophiogomphus acuminatus

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Taxonomy [top]

Kingdom Phylum Class Order Family
ANIMALIA ARTHROPODA INSECTA ODONATA GOMPHIDAE

Scientific Name: Ophiogomphus acuminatus
Species Authority: Carle, 1981
Common Name(s):
English Acuminate Snaketail
Synonym(s):
Ophiogomphus bouchardi Louton, 1982

Assessment Information [top]

Red List Category & Criteria: Near Threatened ver 3.1
Year Published: 2007
Date Assessed: 2007-03-01
Assessor(s): Abbott, J.C.
Reviewer(s): Donnelly, N., Suhling, F. & Clausnitzer, V. (Odonata Red List Authority)
Justification:
This species is very localized and like other Ophiogomphus is probably fairly susceptible to pollution, siltation and damming. There are likely to be hundreds to thousands occurring on each stream, but the species is declining: Ophiogomphus larvae are sensitive to flood scouring as well as pollution. 15+ years of observation support this decline. Extent of occurrence is less than 5,000 km² and area of occupancy is less than 550 km²; the species is known from a total of 31 localities, including eight counties of Tennessee, one in Alabama, and possible larvae in two counties in Kentucky. Other localities were searched for by Tennessen (1994). Larvae are easily washed away by flood scouring. Larvae susceptible to flood-scouring, siltation, and pollutants. The species nearly meets the requirements for Endangered under criterion B and is therefore assessed as Near Threatened.
History:
1996 Vulnerable
1994 Rare (Groombridge 1994)
1990 Rare (IUCN 1990)
1988 Rare (IUCN Conservation Monitoring Centre 1988)
1986 Rare (IUCN Conservation Monitoring Centre 1986)

Geographic Range [top]

Range Description: Endemic to the United States. Known from 11 counties in the states of Alabama and Tennessee. The species may also occur in Kentucky.
Countries:
Native:
United States (Alabama, Tennessee)
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: Sparse gravel pockets in fissures of a rocky stream bed (Carle 1981). Second order streams that are mostly shaded, with relatively stable substrates and riffle areas (Tennessen 1994). Probable two year life cycle.
Systems: Terrestrial; Freshwater

Threats [top]

Major Threat(s): The larval habitat, consisting of chert pebble debris in limestone bedrock streams (Donnelly pers. comm.) is very specialized.

Conservation Actions [top]

Conservation Actions: Short sections of a few streams are protected by the Natchez Trace National Parkway, and the Alabama locality is in the Freedom Hills Wildlife Management Area.

Citation: Abbott, J.C. 2007. Ophiogomphus acuminatus. The IUCN Red List of Threatened Species. Version 2014.2. <www.iucnredlist.org>. Downloaded on 21 September 2014.
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