Common name: Ringed crayfish
Synonyms and Other Names: Orconectes neglectus (Faxon, 1885). Faxonius neglectus underwent a reclassification in August 2017, changing the genus of non-cave dwelling Orconectes to Faxonius (Crandall and De Grave 2017).
available through www.itis.gov
Size: females up to 5 in long
Native Range: Central plains and Ozark regions.
Hydrologic Unit Codes (HUCs) Explained
Puerto Rico &
Interactive maps: Point Distribution Maps
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 Faxonius neglectus are found here.
Table last updated 9/30/2019
† Populations may not be currently present.
Means of Introduction: Pathway unknown.
Impact of Introduction: May be replacing native crayfish.
References: (click for full references)
Revision Date: 1/8/2020
Crandall, K.A. and S. De Grave. 2017. An updated classification of the freshwater crayfishes (Decapoda: Astacidea) of the world, with a complete species list. Journal of Crustacean Biology 37(5):615-653. https://doi.org/10.1093/jcbiol/rux070.
U.S. Geological Survey, 2020, Faxonius neglectus (Faxon, 1885): U.S. Geological Survey, Nonindigenous Aquatic Species Database, Gainesville, FL, https://nas.er.usgs.gov/queries/factsheet.aspx?SpeciesID=2267, Revision Date: 1/8/2020, Access Date: 2/22/2020
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.