Pogonichthys ciscoides Hopkirk, 1974 (1973?)

Clear Lake split-tail, Clear Lake splittail



Taxonomy & Nomenclature



Conservation Status

Extinct (Burkhead, 2012)

Last record: 1970 (Miller et al. 1989:28)

IUCN RedList status: Extinct


Estimated date of extinction: 1970 (Burkhead, 2012)



Clear Lake, Lake County, California, USA


Biology & Ecology










Original scientific description:

Hopkirk, John D. (1973). Endemism in fishes of the Clear Lake region of central California. University of California Publication, Zoology 96: 1-160. Berkeley and Los Angeles: University of California Press.


Other references:

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.

Lee, D.S., Gilbert, C.R., Hocutt, C.H., Jenkins, R.E., McAllister, D.E. and Stauffer, J.R., Jr. 1980. Atlas of North American freshwater fishes. North Carolina State Museum of Natural History, Raleigh, North Carolina.

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.

Moyle, P. B. (1976). Inland Fishes of California. Berkeley: University of California Press.

Moyle, P.B. 2002. Inland fishes of California. Revised and expanded. University of California Press, Berkeley, California.

Murphy, G. I. (1951). The fishery of Clear Lake, Lake County, California. Calif. Fish Game 37: 439-484.

NatureServe. 2013. Pogonichthys ciscoides. The IUCN Red List of Threatened Species 2013: e.T17874A19032197. Accessed on 19 June 2022.

Nelson, J.S., Crossman, E.J., Espinosa-Perez, H., Findley, L.T., Gilbert, C.R., Lea, R.N. and Williams, J.D. 2004. Common and scientific names of fishes from the United States, Canada, and Mexico. American Fisheries Society, Bethesda, Maryland.

Page, L.M. and Burr, B.M. 1991. A field guide to freshwater fishes: North America north of Mexico. Houghton Mifflin Company, Boston, Massachusetts.

Page, L.M. and Burr, B.M. 2011. Peterson field guide to freshwater fishes of North America north of Mexico. Houghton Mifflin Harcourt, Boston, Massachusetts.

Robins, C.R., Bailey, R.M., Bond, C.E., Brooker, J.R., Lachner, E.A., Lea, R.N. and Scott, W.B. 1991. Common and scientific names of fishes from the United States and Canada. American Fisheries Society.

World Conservation Monitoring Centre. (1996). Pogonichthys ciscoides. In: IUCN 2012. IUCN Red List of Threatened Species. Version 2012.2. ( Downloaded on 31 May 2013.


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