Syncaris pasadenae (Kingsley, 1897)

Pasadena freshwater shrimp



Taxonomy & Nomenclature

Synonym/s: Caridina pasadenae Kingsley, 1897; Syncaris pasadenas (Kingsley, 1897); Syncaris trewi Holmes, 1900


Conservation Status


Last record: 1933

IUCN RedList status: Extinct


Martin and Wicksten (2004) consider the extinction of this species to be resolved, as the most recent record of this species is 1933 (Hedgpeth, 1968) with no further records.



Pasadena, California, USA


Biology & Ecology










Original scientific description:

Kingsley, J. S. (1897). On a new genus and two new species of macrurous Crustacea.—Bulletin of the Essex Institute 27: 95-99.


Other references:

De Grave, S. and Rogers, C. (2013). Syncaris pasadenae. The IUCN Red List of Threatened Species. Version 2014.3. ( Downloaded on 29 January 2015.

De Grave, S. & Rogers, C. 2013. Syncaris pasadenae. The IUCN Red List of Threatened Species 2013: e.T21250A2774687. Accessed on 02 July 2022.

Hedgpeth, J. W. (1968). The atyid shrimp of the genus Syncaris in California.—International Revue der Gesamten Hydrobiologie 53: 511-524. [Abstract]

Holmes, S. J. (1900). Synopsis of California stalk-eyed Crustacea—Occasional Papers of the California Academy of Sciences 7: 7-262.

Martin, Joel W., and Wicksten, Mary K. (2004). Review and redescription of the freshwater atyid shrimp genus Syncaris Holmes, 1900, in California. Journal of Crustacean Biology. 24(3): 447-462.

Rogers, D.C. (2005). Identification manual to the freshwater Crustacea of the western United States and adjacent areas encountered during bioassessment. EcoAnalysts, Inc., Technical Publication #1, Moscow, Idaho.


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