Common name: signal crayfish
Synonyms and Other Names: “aquatic cockroaches” (Goldfarb 2015)
available through www.itis.gov
Interactive maps: Point Distribution Maps
Puerto Rico &
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 Pacifastacus leniusculus are found here.
Table last updated 7/4/2018
† Populations may not be currently present.
References: (click for full references)
Revision Date: 1/24/2018
Goldfarb, B. 2015. Invasive crayfish in Oregon devastate native newts. High Country News. http://www.hcn.org/articles/crayfish-doom-crater-lakes-native-newts-invasive. Created on 09/02/2015. Accessed on 01/24/2018.
U.S. Geological Survey, 2018, Pacifastacus leniusculus (Dana, 1852): U.S. Geological Survey, Nonindigenous Aquatic Species Database, Gainesville, FL, https://nas.er.usgs.gov/queries/FactSheet.aspx?SpeciesID=200, Revision Date: 1/24/2018, Access Date: 7/16/2018
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.