Species that are considered high risk have a well-documented history of invasiveness in at least one location globally, and a high or medium climate match to the contiguous United States.
The history of invasiveness is high. There is a long documented history of Lithoglyphus naticoides introductions and spread through canal systems in Europe. A least one documented of significant impact on native Cyprinid species was found. It can also be a vector for human disease. The climate match is high. The highest matches were around the Great Lakes and parts of the Great Plains. The certainty of assessment is medium. The overall risk assessment category is high.
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High Risk
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