Map_thumbnail_large_font

Ophiogomphus anomalus 

Scope: Global
Status_ne_offStatus_dd_offStatus_lc_onStatus_nt_offStatus_vu_offStatus_en_offStatus_cr_offStatus_ew_offStatus_ex_off

Translate page into:

Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Arthropoda Insecta Odonata Gomphidae

Scientific Name: Ophiogomphus anomalus
Species Authority: Harvey, 1898
Common Name(s):
English Extra-striped Snaketail
French Ophiogomphe Bariolé
Taxonomic Source(s): Schorr, M. and Paulson, D. 2013. World Odonata List. Tacoma, Washington, USA Available at: http://www.pugetsound.edu/academics/academic-resources/slater-museum/biodiversity-resources/dragonflies/world-odonata-list2/. (Accessed: 20 November 2013).

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2009
Date Assessed: 2007-03-01
Assessor(s): Paulson, D. R.
Reviewer(s): Clausnitzer, V. & Kalkman, V. (Odonata Red List Authority)
Justification:
O. anomalus is considered rare in most parts of its range but common at certain localities; sufficiently widespread to be presently secure.
Previously published Red List assessments:

Geographic Range [top]

Range Description:This species occurs in four provinces in Canada and seven states in the United States of America.
Countries occurrence:
Native:
Canada (New Brunswick, Nova Scotia, Ontario, Québec); United States (Maine, Michigan, Minnesota, New Jersey, New York, Pennsylvania, Wisconsin)
Additional data:
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:O. anomalus is locally common in scattered populations across fairly wide range. Many populations are established by searching for exuviae (moulted exoskeletons), and those found in some numbers at some locations. Some gomphids have to be surveyed by larvae and/or exuviae, as adults spend much of their time in locations (e.g., high in trees or far out over large rivers) inaccessible to collectors and observers.
Current Population Trend:Stable
Additional data:
Population severely fragmented:No

Habitat and Ecology [top]

Habitat and Ecology:Species occurs at fast-flowing, medium-sized, warm water rivers (100 to 800 ft wide) with abundant gravel and excellent water quality in heavily forested watersheds.
Systems:Terrestrial; Freshwater
Generation Length (years):3

Threats [top]

Major Threat(s): Lowering of water quality through various types of pollution is a threat to this species.

Conservation Actions [top]

Conservation Actions: Saint Croix River, one of the important locations for O. anomalus, is protected in Saint Croix National Scenic Riverway in Minnesota and Wisconsin. Because of specialized habitat requirements, the species is considered rare in most states in which it occurs (US Fisheries and Wildlife Service: www.ecos.fws.gov/speciesProfile/profile/speciesProfile.action?spcode=I0LZ). Listed in some of them: Minnesota (S1S2), Wisconsin (Endangered). Further surveys needed all across range.

Citation: Paulson, D. R. 2009. Ophiogomphus anomalus. The IUCN Red List of Threatened Species 2009: e.T15363A4522594. . Downloaded on 27 September 2016.
Disclaimer: To make use of this information, please check the <Terms of Use>.
Feedback: If you see any errors or have any questions or suggestions on what is shown on this page, please provide us with feedback so that we can correct or extend the information provided