The Recently Extinct Plants and Animals Database

Chasmistes liorus Jordan, 1878:219

June sucker



Taxonomy & Nomenclature

Synonym/s: Chasmistes liorus liorus Jordan, 1878:219; Chasmistes liorus mictus Miller & Smith, 1981:15


Conservation Status

Last record: 1800's; 21 March 1959 (Miller, 1961)

IUCN RedList status: "may be extinct"



Utah Lake, Utah, USA


Biology & Ecology










Day, David. (1981). The Doomsday Book of Animals: A Natural History of Vanished Species. New York, N.Y.: The Viking Press.

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. and Gilbert, C. H. (1881). Notes on a collection of fishes from Utah Lake. Proc. U. S. Natl. Mus. 3: 459-465.

Miller, Robert Rush. (1961). Man and the changing fish fauna of the American southwest. Papers of the Michigan Academy of Science, Arts, and Letters 46: 365-404.

Miller, Robert Rush and Smith, G. R. (1981). Distribution and evolution of Chasmistes (Pisces: Catostomidae) in western North America. Occas. Pap. Mus. Zool. Univ. Mich. 696: 1-46.

Miller, R. R., Williams, J. D. and Williams, J. E. (1989). Extinctions of North American fishes during the past century. Fisheries 14(6): 22-38.

NatureServe. (2013). Chasmistes liorus. The IUCN Red List of Threatened Species. Version 2014.3. ( Downloaded on 26 January 2015.

Tanner, Vasco M. (1936). A study of the Fishes of Utah. Utah Acad. Sci., Arts and Letters 13: 155-184, pls. 1-3.

USFWS. (1986). Final rule determining the june sucker (Chasmistes liorus) to be an endangered species with critical habitat. United States Fish and Wildlife Service, March 31, 1986, 51 FR 10851.


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