Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Arthropoda Malacostraca Decapoda Cambaridae

Scientific Name: Cambarus deweesae
Species Authority: Bouchard & Etnier, 1979
Common Name(s):
English Valley Flame Crayfish

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2010
Date Assessed: 2010-06-01
Assessor(s): Cordeiro, J. & Thoma, R.F.
Reviewer(s): Collen, B. & Richman, N.
Contributor(s): Livingston, F., Livingston, F., Soulsby, A.-M., Batchelor, A., Dyer, E., Whitton, F., Milligan, H.T., Smith, J., Lutz, M.L., De Silva, R., McGuinness, S., Kasthala, G., Jopling, B., Sullivan, K. & Cryer, G.
Cambarus deweesae has been assessed as Least Concern. This is because this species appears to be able to cope with distrubances within its habitat and does not appear to be facing any major threat processes. Further research is needed however into the abundance of this species to ensure it is not undergoing any significant declines as a result of an unknown threat process, as its limited range means it could be susceptible to this.
Previously published Red List assessments:
1996 Endangered (EN)

Geographic Range [top]

Range Description: This species is known from four localities in Anderson and Roane counties, Tennessee (Clinch and Emory River drainages) and is widespread in eastern Kentucky, (Cumberland and Licking River drainages), USA.  Until recently, it was thought to have a restricted range in the Clinch and Emory River drainages of northwest Tennessee, but in recent years has been widely but sporadically collected in central and southeastern Kentucky (Taylor and Schuster 2004).  There is some question as to whether these new populations represent a continuous distribution or isolated disjunct distribution (G. Schuster, C. Taylor, pers. comm. 2009).
Countries occurrence:
United States (Kentucky, Tennessee)
Range Map: Click here to open the map viewer and explore range.

Population [top]


There is insufficient population data available for this species.

Current Population Trend: Unknown
Additional data:
Population severely fragmented: No

Habitat and Ecology [top]

Habitat and Ecology: The type locality of this species is a floodplain in the east of Poplar Creek. The soils consist of clays and fragments of shale. This species is a primary burrower, with complex and variable burrows, the openings of which are well concealed by vegetation (Bouchard and Etnier 1979). These usually occur in open areas with high water tables.
Systems: Freshwater

Threats [top]

Major Threat(s): There are no known major threats affecting this species. However, in the late seventies there was some filling near the type locality, but this did not seem to have a major impact on this species and it was still said to be thriving. Much of the area of the type locality has been incorporated into a golfcourse (Bouchard and Etnier 1979). However, burrowing crayfish are typically able to withstand this kind of distrubance and so the continued survival of this species was not affected (R. Thoma, T. Jones, J. Cordeiro, pers. comm. 2009) .

Conservation Actions [top]

Conservation Actions: This species has been assessed as Currently Stable by the American Fisheries Society (Taylor et al. 2007) and was given a heritage rank of G4 by NatureServe (Taylor et al. 2007, NatureServe 2009). Further research is needed to find the abundance of this species and ensure it is not being affected by some unknown threat process. Its limited range means it could be susceptible to severe declines if a new threat process appears within its range.

Classifications [top]

5. Wetlands (inland) -> 5.8. Wetlands (inland) - Seasonal/Intermittent Freshwater Marshes/Pools (under 8ha)
suitability: Marginal  
5. Wetlands (inland) -> 5.18. Wetlands (inland) - Karst and Other Subterranean Hydrological Systems (inland)
suitability: Suitable  

In-Place Research, Monitoring and Planning
In-Place Land/Water Protection and Management
In-Place Species Management
In-Place Education
6. Human intrusions & disturbance -> 6.1. Recreational activities
♦ timing: Ongoing    
→ Stresses
  • 1. Ecosystem stresses -> 1.1. Ecosystem conversion
  • 1. Ecosystem stresses -> 1.2. Ecosystem degradation

6. Human intrusions & disturbance -> 6.3. Work & other activities
♦ timing: Past, Likely to Return ♦ scope: Unknown ♦ severity: Unknown ⇒ Impact score: No/Negligible Impact: 0 
→ Stresses
  • 1. Ecosystem stresses -> 1.1. Ecosystem conversion
  • 1. Ecosystem stresses -> 1.2. Ecosystem degradation

1. Research -> 1.2. Population size, distribution & trends
1. Research -> 1.5. Threats

Bibliography [top]

Bouchard, R.W. and Etnier, D.A. 1979. A new species of primary burrowing crayfish of the genus Cambarus from the Ridge and Valley Province in Tennessee. Proceedings of the Bioloigcal Society of Washington 92(3): 589-600.

Fetzner, J.W. 2008. Crayfish Taxonomy Browser. Available at: (Accessed: June).

IUCN. 2010. IUCN Red List of Threatened Species (ver. 2010.3). Available at: (Accessed: 2 September 2010).

NatureServe. 2009. NatureServe Explorer: An online encyclopedia of life [web application]. Version 7.1. Internet

Taylor, C.A. and Schuster, G.A. 2004. Crayfishes of Kentucky. Illinois Natural History Survey, Special Publication.

Taylor, C.A., Schuster, G.A., Cooper, J.E., DiStefano, R.J., Eversole, A.G., Hamr, P., Hobbs III, H.H., Robinson, H.W., Skelton, C.E. and Thoma, R.F. 2007. A Reassessment of the Conservation Status of Crayfishes of the United States and Canada after 10+ years of Increased Awareness. Fisheries, American Fisheries Society 32(8): 371-389.

Citation: Cordeiro, J. & Thoma, R.F. 2010. Cambarus deweesae. The IUCN Red List of Threatened Species 2010: e.T3679A10013740. . Downloaded on 04 October 2015.
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