Crangonyx pseudogracilis
Crangonyx pseudogracilis
(northern river crangonyctid)
Crustaceans-Amphipods
Native Transplant
Collection Info
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5 results for Crangonyx pseudogracilis (northern river crangonyctid)
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Specimen IDStateCountyLocalityYear HUC Number What's this? Drainage nameStatus
1754190 ILJohnsonMax Creek floodplain, 2 mi SW Simpson1975 05140203 Lower Ohio-Bay 
1754192 ILWabashfloodplain, 0.5 mi S Patton1981 05120113 Lower Wabash 
1924791 NYSuffolkLong Island Sound2010 02030203 Long Island Sound 
243002 ORColumbiaMultnomah Channel, Sauvie Island-Gilbert River Boat Ramp2002 17090012 Lower Willametteestablished
242998 ORMultnomahColumbia Slough, Incendiary Bridge2002 17090012 Lower Willametteestablished

Data Disclaimer: Number of records does not imply species abundance. This summary represent collection records only and may not reflect the actual distribution of established populations. These data are preliminary or provisional and are subject to revision. They are being provided to meet the need for timely best science. The data have not received final approval by the U.S. Geological Survey (USGS) and are provided on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from the authorized or unauthorized use of the data.

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Citation information: U.S. Geological Survey. [2026]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [6/24/2026].

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