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.
Indoplanorbis exustus is a common freshwater snail that has a widespread native range in Asia. The history of invasiveness for I. exustus is not documented. There are records of introductions and two sources stated that the species is an intermediate host for parasites that are threats to human and livestock health. However, those studies were conducted in the native range of I. exustus and not its introduced range so it is unknown if it would serve the same function in the introduced range. The climate match was high, indicating that the climate in the southwest could potentially support this species. The certainty of assessment was medium. The overall risk assessment category is high.
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High Risk
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