Specimen Information

Faxonius obscurus
Faxonius obscurus
(Allegheny crayfish)
Crustaceans-Crayfish
Native Transplant
Collection Info
Point Map
Species Profile
Animated Map

Specimen ID1695172
GroupCrustaceans-Crayfish
GenusFaxonius
Speciesobscurus
Common NameAllegheny crayfish
StatePA
CountyColumbia
LocalityNorth Branch Susquehanna River
Mapping AccuracyAccurate
HUC8 NameUpper Susquehanna-Lackawanna
HUC8 Number02050107
HUC10 NameLower Susquehanna River
HUC10 Number0205010710
HUC12 NameTenmile Creek-Susquehanna River
HUC12 Number020501071002
Map

NAS ARM
Collection Day24
Collection Month9
Collection Year2020
Year AccuracyActual
Potential Pathwayreleased aquarium | released bait
Statusestablished
CommentsThis species is common in the North Branch Susquehanna River and its tributaries, but records appear to be lacking on the USGS database. I will upload other records as I can.
Record TypeNAS sighting report
VerifierWesley Daniel (USGS)
Freshwater/MarineFreshwater
Number Collected4
Photo
Faxonius obscurus
Faxonius obscurus

Disclaimer:

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. [2025]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [12/5/2025].

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 general information and questions about the database, contact Wesley Daniel. For problems and technical issues, contact Matthew Neilson.