Valvata virens virens Tryon, 1863

Emerald valvata



Taxonomy & Nomenclature



Conservation Status

Missing (Taylor, 1981; Cowie et al., 2017)

IUCN RedList status: Vulnerable


May be extant (Burch, 1982).



Clear Lake, California, USA


May not be a Californian endemic (Burch, 1982).


Biology & Ecology










Original scientific description:

Tryon, G. W. (1863). Descriptions of new species of fresh water Mollusca, belonging to the families Amnicolidae, Valvatidae and Limnaeidae; inhabiting California. Proceedings of the Academy of Natural Sciences, Philadelphia 15: 147-150.

Other references:

Bogan, A. E. (1996). Valvata virens. In: IUCN 2013. IUCN Red List of Threatened Species. Version 2013.1. ( Downloaded on 27 July 2013.

Burch, J. B. (1982). North American freshwater snails: identification keys, generic synonymy, supplemental notes, glossary, references, index. Walkerana 1(4): 217-365.

Cowie, Robert H., Régnier, Claire, Fontaine, Benoît, and Bouchet, Philippe. (2017). Measuring the Sixth Extinction: what do mollusks tell us? The Nautilus 131(1): 3-41.

Hannibal, H. (1909). A new Carinifex from the Santa Clara lake beds (Pliocene), California. The Nautilus 23(3): 40-41.

Johnson, P. D.; Bogan, A. E.; Brown, K. M.; Burkhead, N. M.; Cordeiro, J. R.; Garner, J. T.; Hartfield, P. D.; Lepitzki, D. A. W.; Mackie, G. L.; Tarpley, T. A.; Tiemann, J. S.; Whelan, N. V.; Strong, E. E. (2013). Conservation status of freshwater gastropods of Canada and the United States. Fisheries 38(6): 247-282.

Taylor, D.W. (1981). Freshwater mollusks of California: a distributional checklist. California Fish and Game 67(3): 140-163.


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