Ecological Risk Screening Summary - Disparalona hamata (a cladoceran, no common name) - Uncertain Risk

Disparalona hamata is a cladoceran that is native to North and Central America. There is taxonomic uncertainty in the genus Disparalona, and various sources have defined D. hamata differently. The History of Invasiveness for Disparalona hamata is classified as Data Deficient because no impacts of its reported introduction to locations in Europe have been reported. The climate matching analysis for the contiguous United States indicates that Yes, there is establishment concern for this species outside its native range, despite minimal source points available for the analysis. The highest climate matches were found in the Great Lakes basin, Southeast, and Mid-Atlantic regions, and in southern Texas. The Certainty of Assessment for this ERSS is classified as Low due to a general lack of available information on the biology, ecology, and distribution for this species, along with taxonomic uncertainty. The Overall Risk Assessment Category for this species in the contiguous United States is Uncertain.

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.