Oncorhynchus clarkii macdonaldi (Jordan & Evermann, 1890)

Yellowfin cutthroat trout, Yellow-fin cut-throat trout



Taxonomy & Nomenclature

Synonym/s: Salmo clarki macdonaldi Jordan & Fisher, 1891; Salmo mykiss macdonaldi Jordan and Evermann, 1890 (original combination); Oncorhynchus clarkii macdonaldi Jordan & Fisher, 1891 (incorrect author)


Conservation Status

Extinct (Burkhead, 2012)

Last record: 1889


Estimated date of extinction: 1910 (Burkhead, 2012)


A collection of trout from Twin Lakes in 1903 did not contain any Yellowfin cutthroat trout, and it is believed that they had become extinct by that time as a result either of hybridization or competition, or both, with the introduced rainbow trout (Behnke, 2002:144).



Twin Lakes, Lake County, Colorado, USA


Biology & Ecology










Original scientific description:

Jordan, David S. and Evermann, Barton W. (1890). Description of the yellow-finned trout of Twin Lakes, Colorado. Proceedings of the United States National Museum 12: 453-454.

Other references:

Behnke, Robert J. (1979). Monograph of the native trouts of the genus Salmo of western North America. USDA Forest Service, Lakewood, CO. 163 pp.

Behnke, Robert J. (1992). Native trout of western North America. American Fisheries Society Monograph 6. xx + 275 pp.

Behnke, Robert J. (2002). Trout and Salmon of North America. New York: Free Press. [Google Preview]

Burkhead, Noel M. (2012). Extinction Rates in North American Freshwater Fishes, 1900–2010. BioScience 62(9): 798-808.

Jelks, Howard L., Walsh, Stephen J., Burkhead, Noel M., Contreras-Balderas, Salvador, Díaz-Pardo, Edmundo, Hendrickson, Dean A., Lyons, J., Mandrak, Nicholas E., McCormick, Frank, Nelson, Joseph F., Platania, Steven P., Porter, Brady A., Renaud, Claude B., Schmitter-Soto, Juan Jacabo, Taylor, Eric B. and Warren, Melvin L. Jr. (2008). Conservation status of imperiled North American freshwater and diadromous fishes. Fisheries 33(8): 372-407.

Jordan, D. S. (1891). Report of explorations in Colorado and Utah during the summer of 1889, with an account of the fishes found in each of the river basins examined. Bulletin of the U.S. Fish Commission 9: 1-40.

Jordan, D. S. (1922). The days of a man, Vol. 1. New York: World Books Co. 710 pp.

Miller, Robert R., Williams, James D. and Williams, Jack E. (1989). Extinctions of North American Fishes During the Past Century. Fisheries 14(6): 22-38.

Page, L. M. and Burr, B. M. (2011). Peterson field guide to freshwater fishes of North America north of Mexico. Second edition. Houghton Mifflin Harcourt, Boston. xix + 663 pp.

Smith, G. R. and Stearley, R. F. (1989). The classification and scientific names of rainbow and cutthroat trouts. Fisheries (Bethesda) 14(1): 4-10.


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