The Nonindigenous Occurrences section of the NAS species profiles has a new structure. The section is now dynamically updated from the NAS database to ensure that it contains the most current and accurate information. Occurrences are summarized in Table 1, alphabetically by state, with years of earliest and most recent observations, and the tally and names of drainages where the species was observed. The table contains hyperlinks to collections tables of specimens based on the states, years, and drainages selected. References to specimens that were not obtained through sighting reports and personal communications are found through the hyperlink in the Table 1 caption or through the individual specimens linked in the collections tables.

Apocorophium lacustre
(a scud)
Native Transplant
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Apocorophium lacustre Vanhoffen, 1911

Common name: a scud

Taxonomy: available through www.itis.govITIS logo

Native Range: Atlantic Ocean, coast of North America.

US auto-generated map Legend USGS Logo
Alaska auto-generated map
Hawaii auto-generated map
Caribbean auto-generated map
Puerto Rico &
Virgin Islands
Guam auto-generated map
Guam Saipan
Hydrologic Unit Codes (HUCs) Explained
Interactive maps: Point Distribution Maps

Nonindigenous Occurrences:

Table 1. States with nonindigenous occurrences, the earliest and latest observations in each state, and the tally and names of HUCs with observations†. Names and dates are hyperlinked to their relevant specimen records. The list of references for all nonindigenous occurrences of Apocorophium lacustre are found here.

StateYear of earliest observationYear of last observationTotal HUCs with observations†HUCs with observations†
Illinois200320156Highland-Pigeon; Lower Illinois; Lower Illinois-Lake Chautauqua; Lower Ohio-Bay; Upper Illinois; Upper Mississippi-Cape Girardeau
Indiana200520105Blue-Sinking; Highland-Pigeon; Lower Ohio-Little Pigeon; Middle Ohio-Laughery; Silver-Little Kentucky
Kentucky200420108Blue-Sinking; Highland-Pigeon; Little Scioto-Tygarts; Lower Ohio-Bay; Lower Ohio-Little Pigeon; Middle Ohio-Laughery; Ohio Brush-Whiteoak; Silver-Little Kentucky
Missouri200620061Upper Mississippi-Cape Girardeau
Ohio200520105Little Scioto-Tygarts; Middle Ohio-Laughery; Ohio Brush-Whiteoak; Raccoon-Symmes; Upper Ohio-Shade
Pennsylvania200820081Upper Ohio
West Virginia200520104Little Muskingum-Middle Island; Raccoon-Symmes; Upper Ohio-Shade; Upper Ohio-Wheeling

Table last updated 9/30/2019

† Populations may not be currently present.

References: (click for full references)

Grigorovich, I.A., T.R. Angradi, E.B. Emery, and M.S. Wooten. 2008. Invasion of the upper Mississippi River system by saltwater amphipods. Fundamental and Applied Limnology 173(1):67-77.

Author: Benson, A.J.

Revision Date: 3/7/2018

Citation Information:
Benson, A.J., 2019, Apocorophium lacustre Vanhoffen, 1911: U.S. Geological Survey, Nonindigenous Aquatic Species Database, Gainesville, FL, https://nas.er.usgs.gov/queries/FactSheet.aspx?speciesID=2315, Revision Date: 3/7/2018, Access Date: 10/17/2019

This information is preliminary or provisional and is subject to revision. It is being provided to meet the need for timely best science. The information has not received final approval by the U.S. Geological Survey (USGS) and is 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 information.


The data represented on this site vary in accuracy, scale, completeness, extent of coverage and origin. It is the user's responsibility to use these data consistent with their intended purpose and within stated limitations. We highly recommend reviewing metadata files prior to interpreting these data.

Citation information: U.S. Geological Survey. [2019]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [10/17/2019].

Contact us if you are using data from this site for a publication to make sure the data are being used appropriately and for potential co-authorship if warranted. For queries involving fish, please contact Matthew Neilson. For queries involving invertebrates, contact Amy Benson.