Eurytemora is a genus of copepods in the family Temoridae.
In E. affinis, the populations that invaded freshwater environments experienced directional selection for improved osmoregulatory ability, such that individuals were able to cope better with lowered levels of salinity and therefore survive and reproduce more successfully.Lee, Catherine E., and John D. McPhail. "Directional Selection and Rapid Adaptation in Eurytemora affinis." Journal of Evolutionary Biology, vol. 17, no. 6, 2004, pp. 1270–1277.
Species The World Register of Marine Species lists the following species: Eurytemora affinis (Poppe, 1880) Eurytemora americana Williams, 1906 Eurytemora arctica Wilson M.S. & Tash, 1966 Eurytemora asymmetrica Smirnov, 1935 Eurytemora bilobata Akatova, 1949 Eurytemora brodskyi Kos, 1993 Eurytemora canadensis Marsh, 1920 Eurytemora carolleeae Alekseev & Souissi, 2011 Eurytemora caspica Sukhikh & Alekseev, 2013 Eurytemora clausii (Hoek, 1876) Eurytemora composita Keiser, 1929 Eurytemora foveola Johnson M.W., 1961 Eurytemora gracilicauda Akatova, 1949 Eurytemora gracilis (Sars G.O., 1898) Eurytemora grimmi (Sars G.O., 1897) Eurytemora herdmani Thompson I.C. & Scott A., 1897 in Thompson, Scott & Herdman, 1897 Eurytemora kurenkovi Borutsky, 1961 Eurytemora lacinulata (Fischer, 1853) Eurytemora lacustris (Poppe, 1887) Eurytemora minor Behning, 1938 Eurytemora pacifica Sato, 1913 Eurytemora raboti Richard, 1897 Eurytemora richingsi Heron & Damkaer, 1976 Eurytemora velox (Lilljeborg, 1853) Eurytemora wolterecki Mann, 1940 Eurytemora yukonensis Wilson M.S., 1953
References
Further reading Czajka, Frank, et al. "Rapid Evolution of Salinity Tolerance in the Invasive Copepod Eurytemora affinis." Evolutionary Applications, vol. 6, no. 3, 2013, pp. 368–377.