Anodonta dejecta Lewis, 1875

Woebegone floater



Taxonomy & Nomenclature

The Arizona population of A. dejecta was synonymized with [i]A. californiensis[/i] by (Bequaert and Miller, 1973). The whole species was synonymized with [i]A. californiensis[/i] by (Williams et al. 2017).


Conservation Status

Invalid (synonym)

Last record: 1922?



California, USA


Biology & Ecology










Bequaert, J,C. and Miller, W. B. (1973). The mollusks of the arid Southwest with an Arizona check list. Tuscon, Arizona: University of Arizona Press.

Bowersox, J. Richard. (2003). Salinity tolerance of the freshwater mussel Anodonta dejecta Lewis in Holocene Lake Cahuilla, southeastern California: a caution in the use of fossil freshwater mussels as a freshwater indicator in stable isotope studies. Seattle Annual Meeting (November 2–5, 2003).

Dettman, D.L., K.W. Flessa, P.D. Roopnarine, B.R. Schone, and D.H. Goodwin. 2004. The use of oxygen isotope variation in shells of estuarine mollusks as a quantitative record of seasonal ann annual Colorado River discharge. Geochimica et Cosmochimica Acta 68(6):1253-1263.

Graf, Daniel L. and Cummings, Kevin S. (2021). A ‘big data’ approach to global freshwater mussel diversity (Bivalvia: Unionoida), with an updated checklist of genera and species. Journal of Molluscan Studies 87(1): eyaa034.

NatureServe. (2014). NatureServe Explorer: An online encyclopedia of life [web application]. Version 7.1. NatureServe, Arlington, Virginia. Available (Accessed: January 29, 2015).

Pilsbry, H.A. and J.H. Ferriss. 1919. Mollusca of the southwestern states IX: The Santa Catalina, Rincon, Tortillita and Galiuro Mountains. X. The Mountains of the Gila Headwaters. Proceedings of the Academy of Natural Sciences of Philadelphia, 70(1918): 282-333.

Simpson, Charles Torrey. (1894). Types of Anodonta dejecta rediscovered. Nautilus 8(5): 52-53.

Williams, James D., Bogan, Arthur E., Butler, Robert S., Cummings, Kevin S., Garner, Jeffrey T., Harris, John L., Johnson, Nathan A. and Watters, G. Thomas. (2017). A revised list of the freshwater mussels (Mollusca: Bivalvia: Unionida) of the United States and Canada. Freshwater Mollusk Biology and Conservation 20: 33-58.


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