Species that are considered uncertain risk need a more in-depth assessment beyond the Risk Summary to better define the species’ risk to U.S. environments.
Mytilopsis adamsi is a brackish water mollusk native to tropical West Pacific coast of Central America. This coastal species reproduces and grows better at lower salinities. M. adamsi is not currently present in trade. It is prohibited in Arizona and Oregon as part of the Dreissenidae family. Introductions outside of its native range have been reported in Mexico, southern and southeast Asia and the western Pacific. Established populations in those locations have caused significant fouling of infrastructure and can exclude other organisms from settling. The history of invasiveness is classified as high. Overall climate match with the contiguous United States is low. Most of the contiguous United States had a low match. Areas of medium match were found along the California, eastern Gulf, and southern Atlantic coasts. The certainty of this assessment is medium due to taxonomic uncertainty within the Mytilopsis genus and a lack of georeferenced observations of the species. The overall risk assessment category for Mytilopsis adamsi is Uncertain.
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Uncertain Risk
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