Elaphoidella bidens bidens
(a copepod)
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Elaphoidella bidens bidens (Schmeil, 1894)

Common name: a copepod

Taxonomy: available through www.itis.govITIS logo

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.

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Nonindigenous Occurrences: Non-specific locations in Florida, Georgia, Louisiana, Minnesota, New York, North Carolina, Ohio, Pennsylvania, South Carolina, and Tennessee (McLaughlin et al., 2005). Found in modest numbers in the three lower Great Lakes (Huron, Erie, and Ontario) (Hudson and Lesko, 2003), also in Maryland (USNM 283421), Virginia (USNM 250448, 278112) and the District of Columbia (USNM 251796, 278180).

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.

Status: Unknown.

Impact of Introduction: Unknown.

Remarks: Males are rarely encountered, and the most common mode of reproduction is parthenogenesis (Hudson and Lesko, 2003). This characteristic makes it different from all of its other North American congeners (Bruno et al., 2000). Adults are capable surviving complete desiccation for months; the nauplii of this species have been found in mud taken from the feet of shore birds (Hudson and Lesko, 2003).

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.

Author: Benson, A.J.

Revision Date: 3/1/2013

Citation Information:
Benson, A.J., 2017, 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: 9/19/2017

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.

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Citation information: U.S. Geological Survey. [2017]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [9/19/2017].

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