Disclaimer:

The Nonindigenous Occurrences section of the NAS species profiles has a new structure. The section is now dynamically updated from the NAS database to ensure that it contains the most current and accurate information. Occurrences are summarized in Table 1, alphabetically by state, with years of earliest and most recent observations, and the tally and names of drainages where the species was observed. The table contains hyperlinks to collections tables of specimens based on the states, years, and drainages selected. References to specimens that were not obtained through sighting reports and personal communications are found through the hyperlink in the Table 1 caption or through the individual specimens linked in the collections tables.

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Common name: divergens copepod

Taxonomy: available through www.itis.gov

Native Range:

Alaska	Hawaii	Puerto Rico & Virgin Islands	Guam Saipan

Hydrologic Unit Codes (HUCs) Explained
Interactive maps: Point Distribution Maps

Remarks: There is substantial uncertainty surrounding the taxonomy of the genus Cyclops. While this profile follows ITIS in using the subspecies Cyclops abyssorum divergens, many recent publications recognize Cyclops divergens as the valid scientific name.

References: (click for full references)

Connolly, J. K., Marshall, C. C., Hudson, P. L., Watkins, J. M., Scofield, A. E., & Rudstam, L. G. (2022). Reevaluation of the genus Cyclops Müller, 1776 (Cyclopoida: Cyclopidae) in the Laurentian Great Lakes basin: first report of the Palearctic species Cyclops divergens Lindberg, 1936 from Lake Erie and documentation of Cyclops sibiricus Lindberg, 1949 in the St. Marys River. Zootaxa, 5182(2), 183–195.

Einsle, U. (1985). A Further Criterion for the Identification of Species in the Genus Cyclops s. str. (Copepoda, Cyclopoida). Crustaceana, 49(3), 299–309.

Fanberg, L. M., & Connolly, J. K. (2023). Cyclops divergens Lindberg, 1936 (Cyclopoida: Cyclopidae): first record of occurrence in Lake Superior, USA. Zootaxa, 5323(3), 443–445.

Holynska, M., & Wyngaard, G. A. (2019). Towards a phylogeny of Cyclops (Copepoda): (in)congruences among morphology, molecules and zoogeography. Zoologica Scripta, 48(4), 479–502. https://doi.org/10.1111/zsc.12342

Krajícek, M., Fott, J., Miracle, M. R., Ventura, M., Sommaruga, R., Kirschner, P., & Cerný, M. (2016). The genus Cyclops (Copepoda, Cyclopoida) in Europe. Zoologica Scripta, 45(6), 671–682.

U.S. Fish and Wildlife Service. (2022, April). Cyclops abyssorum divergens (a copepod, no common name) Ecological Risk Screening Summary. Web Version.

Author: C. Shelly

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.