Common name: a copepod
available through www.itis.gov
Size: Less than 1 mm
Native Range: The genus has a worldwide distribution. However, Bruno et al. (2000) believe it may be introduced to North America from Eurasia as a large majority of records come from disturbed habitats.
Hydrologic Unit Codes (HUCs) Explained
Puerto Rico &
Interactive maps: Point Distribution Maps
Table 1. States with nonindigenous occurrences, the earliest and latest observations in each state, and the tally and names of HUCs with observations†. Names and dates are hyperlinked to their relevant specimen records. The list of references for all nonindigenous occurrences of Elaphoidella bidens bidens are found here.
Table last updated 9/16/2021
† Populations may not be currently present.
* HUCs are not listed for states where the observation(s) cannot be approximated to a HUC (e.g. state centroids or Canadian provinces).
Ecology: This species inhabits freshwater lakes, streams, reservoirs, and marshes; can tolerate eutrophic waters (Hudson and Lesko, 2003).
Means of Introduction: Unknown, but because it has also been found in the Great Lakes, ballast water may have been how it was introduced initially.
Impact of Introduction: The impacts of this species are currently unknown, as no studies have been done to determine how it has affected ecosystems in the invaded range. The absence of data does not equate to lack of effects. It does, however, mean that research is required to evaluate effects before conclusions can be made.
References: (click for full references)
Bruno, M.C., J.W. Reid, and S.A. Perry. 2000. New records of copepods from Everglades National Park (Florida): description of two new species of Elaphoidella (Harpacticoida, Canthocamptidae), and supplementary description of Diacyclops nearcticus Kiefer (Cyclopoida, Cyclopidae). Crustaceana 73:1171-1204.
Hudson, P.L., and L.T. Lesko. 2003. Free-living and Parasitic Copepods of the Laurentian Great Lakes: Keys and Details on Individual Species. Ann Arbor, MI: Great Lakes Science Center Home Page. http://www.glsc.usgs.gov/greatlakescopepods/
McLaughlin, P.L. and 38 others. 2005. Common and scientific names of aquatic invertebrates from the United States and Canada: Crustaceans. American Fisheries Society Special Publication 31, Bethesda, Maryland.
Revision Date: 3/1/2013
Benson, A.J., 2021, Elaphoidella bidens bidens (Schmeil, 1894): U.S. Geological Survey, Nonindigenous Aquatic Species Database, Gainesville, FL, https://nas.er.usgs.gov/queries/FactSheet.aspx?SpeciesID=2772, Revision Date: 3/1/2013, Access Date: 9/16/2021
This information is preliminary or provisional and is subject to revision. It is being provided to meet the need for timely best science. The information has not received final approval by the U.S. Geological Survey (USGS) and is provided on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from the authorized or unauthorized use of the information.