Ophiogomphus anomalus


Taxonomy [top]

Kingdom Phylum Class Order Family

Scientific Name: Ophiogomphus anomalus
Species Authority: Harvey, 1898
Common Name(s):
English Extra-striped Snaketail
French Ophiogomphe Bariolé

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)
O. anomalus is considered rare in most parts of its range but common at certain localities; sufficiently widespread to be presently secure.
2007 Least Concern

Geographic Range [top]

Range Description: This species occurs in four provinces in Canada and seven states in the United States of America.
Canada (New Brunswick, Nova Scotia, Ontario, Québec); United States (Maine, Michigan, Minnesota, New Jersey, New York, Pennsylvania, Wisconsin)
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.
Population Trend: Stable

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

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: 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. Version 2015.2. <>. Downloaded on 01 September 2015.
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