Pogonichthys ciscoides


Taxonomy [top]

Kingdom Phylum Class Order Family

Scientific Name: Pogonichthys ciscoides
Species Authority: Hopkirk, 1974
Common Name(s):
English Clear Lake Splittail

Assessment Information [top]

Red List Category & Criteria: Extinct ver 3.1
Year Published: 2013
Date Assessed: 2012-08-04
Assessor(s): NatureServe
Reviewer(s): Smith, K. & Darwall, W.R.T.
Facilitator/Compiler(s): Hammerson, G.A. & Ormes, M.
This species is listed as Extinct because it has not been documented since 1970, despite adequate surveys.
1996 Extinct

Geographic Range [top]

Range Description: This species' range included Clear Lake and its tributary streams, Lake County, California. Evidently it is now Extinct. It was last collected in 1970.
Regionally extinct:
United States
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: No occurrences, subpopulations, or locations for this species remain today.

Habitat and Ecology [top]

Habitat and Ecology: Adults were pelagic in the lake; littoral when young. Spawning occurred in gravel riffles in streams tributary to Clear Lake.
Systems: Freshwater

Use and Trade [top]

Use and Trade: This species was not utilized.

Threats [top]

Major Threat(s): This species' population declined precipitously in the 1940s, probably due to reduced water flow caused by irrigation methods, and increase in bluegill population (Moyle 1976); and possibly also due to applications of pesticides (Miller et al. 1989).

Conservation Actions [top]

Conservation Actions: This species is extinct.

Citation: NatureServe 2013. Pogonichthys ciscoides. The IUCN Red List of Threatened Species. Version 2015.2. <>. Downloaded on 01 September 2015.
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