Ecological Risk Screening Summary - Henslow Peaclam (Euglesa henslowana) - Uncertain Risk

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.

Euglesa henslowana, Henslow Peaclam, is a freshwater mollusk that is native to most of northern Eurasia, from the United Kingdom to Russia. E. henslowana has been reported as introduced and established beyond its native range to eastern North America. However, there is no indication this species is in trade, and no negative impacts of introduction have been reported. The History of Invasiveness for this species is classified as Data Deficient due to the lack of information on impacts of introduction. The climate matching analysis for the contiguous United States indicates establishment concern for this species. Areas of high match were particularly concentrated in the Northeast and Great Lakes region where this species is established. The Certainty of Assessment for this ERSS is classified as Low due to the lack of information on impacts of introduction and trade. The Overall Risk Assessment Category for E. henslowana in the contiguous United States is Uncertain.