Orconectes sheltae Cooper & Cooper, 1997

Shelta Cave crayfish

 

 

Taxonomy & Nomenclature

 

 

Conservation Status

Rediscovered?

Last record: 1988 (Hobbs & Bagley, 1989)

IUCN RedList status: Critically Endangered

The Shelta Cave Crayfish is critically endangered, and possibly extinct (Buhay & Crandall, 2005; Schuster et. al., 2010), being known from only 17 specimens as well as a further 97 individuals which were recorded and then released over a 7 year period (1968 to 1975; see Cooper, 1975). No specimens had been recorded in the last two decades (Buhay & Crandall, 2008), although a recent (August 2020) iNaturalist observation of the species by Matthew L. Niemiller (Assistant Professor of Biological Sciences at The University of Alabama) exists (https://www.inaturalist.org/photos/99754049) and thus if accurate would qualify the species as rediscovered.

The reasons for its decline are believed to be a decline in the availability of nutrients (in the form of guano) in the cave, as the result of Gray bats (Myotis grisescens) abandoning it. However, competition with the other two troglobitic species of crayfish in Shelta Cave (Oconectes australis australis and Cambarus jonesi) may also be partly to blame.

 

Distribution

Shelta Cave, Huntsville, Alabama (northern), USA

 

Biology & Ecology

The species may have matured at around 40 years old and lived for a century (Cooper & Cooper, 1997).

 

Hypodigm

17 individuals were collected (and presumably preserved in institution collections) (Buhay & Crandall, 2008).

 

Media

 

 

References

Original scientific description:

Cooper, John E. and Cooper, Martha Riser. (1997). New troglobitic crayfish of the genus Orconectes, subgenus Orconectes (Decapoda: Cambaridae), endemic to Shelta Cave, Huntsville, Alabama. Journal of Cave and Karst Studies 59(3): 119-127.

 

Other references:

Buhay, Jennifer E. and Crandall, Keith A. (2005). Subterranean phylogeography of freshwater crayfishes shows extensive gene flow and surprisingly large population sizes. Molecular Ecology 14: 4259-4273.

Buhay, Jennifer E. and Crandall, Keith A. (2008). Taxonomic revision of cave crayfishes in the genus Orconectes, subgenus Orconectes (Decapoda: Cambaridae) along the Cumberland Plateau, including a description of a new species, Orconectes barri. Journal of Crustacean Biology 28(1): 57-67.

Buhay, Jennifer E. and Crandall, Keith A. (2009). Taxonomic revision of cave crayfish in the genus Cambarus, subenus Aviticambarus (Decapoda: Cambaridae) with descriptions of two new species, C. speleocoopi and C. laconensis, endemic to Alabama, U.S.A. Journal of Crustacean Biology 29(1):121-134.

Cooper, J. E. (1975). Ecological and Behavioral Studies in Shelta Cave, Alabama, with Emphasis on Decapod Crustaceans. Ph.D. dissertation. University of Kentucky, Lexington, Kentucky. 364 pp

Crandall, K. A., and De Grave, S. (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.

Hobbs, H. H. III and Bagley, F. M. (1989). Shelta Cave Management Plan, Biology Subcommittee of the Shelta Cave Management Committee. 78 pp.

McLaughlin, P.A., D.K. Camp, M.V. Angel, E.L. Bousfield, P. Brunel, R.C. Brusca, D. Cadien, A.C. Cohen, K. Conlan, L.G. Eldredge, D.L. Felder, J.W. Goy, T. Haney, B. Hann, R.W. Heard, E.A. Hendrycks, H.H. Hobbs III, J.R. Holsinger, B. Kensley, D.R. Laubitz, S.E. LeCroy, R. Lemaitre, R.F. Maddocks, J.W. Martin, P. Mikkelsen, E. Nelson, W.A. Newman, R.M. Overstreet, W.J. Poly, W.W. Price, J.W. Reid, A. Robertson, D.C. Rogers, A. Ross, M. Schotte, F. Schram, C. Shih, L. Watling, G.D.F. Wilson, and D.D. Turgeon. 2005. Common and scientific names of aquatic invertebrates from the United States and Canada: Crustaceans. American Fisheries Society Special Publication 31: 545 pp.

Mirarchi, R.E., M.A. Bailey, J.T. Garner, T.M. Haggerty, T.L. Best, M.F. Mettee, and P. O'Neil. 2004d. Alabama Wildlife. Volume Four: Conservation and Management Recommendations for Imperiled Wildlife. University of Alabama Press, Tuscaloosa, Alabama. 221 pp.

Schuster, G. A. and Taylor, C. A. (2004). Report on the crayfishes of Alabama: literature and museum database review, species list with abbreviated annotations and proposed conservation statuses. Illinois Natural History Survey Technical Report, 2004(12): 47 pp.

Schuster, G.A., Taylor, C.A. & Cordeiro, J. (2010). Orconectes sheltae. In: IUCN 2010. IUCN Red List of Threatened Species. Version 2010.4. (https://www.iucnredlist.org). Downloaded on 07 June 2011.

Schuster, G.A., C.A. Taylor, and J. Johansen. (2008). An annotated checklist and preliminary designation of drainage distributions of the crayfishes of Alabama. Southeastern Naturalist, 7(3): 493-504.

Taylor, C.A., G.A. Schuster, J.E. Cooper, R.J. DiStefano, A.G. Eversole, P. Hamr, H.H. Hobbs III, H.W. Robison, C.E. Skelton, and R.F. Thoma. 2007. A reassessment of the conservation status of crayfishes of the United States and Canada after 10+ years of increased awareness. Fisheries 32(8):371-389.

https://www.utexas.edu/tmm/sponsored_sites/biospeleology/pdf/2006%20cavebio%20issues.pdf

https://www.inaturalist.org/taxa/776147-Orconectes-sheltae

 

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