Cambarus bartonii

Taxobox | name = "Cambarus bartonii"
regnum = Animalia
phylum = Arthropoda
subphylum = Crustacea
classis = Malacostraca
ordo = Decapoda
familia = Cambaridae
genus = "Cambarus"
species = "C. bartonii"
binomial = "Cambarus bartonii"
binomial_authority = (Fabricius, 1798)
synonyms = "Astacus ciliaris" Rafinesque, 1817
"Astacus pusillus" Rafinesque, 1817
"Cambarus montanus" Girard, 1852
nowrap|"Cambarus pusillus" Girard, 1852 cite web |url=http://iz.carnegiemnh.org/crayfish/NewAstacidea/species.asp?g=Cambarus&s=bartonii&ssp=bartonii |title="Cambarus" ("Cambarus") "bartonii bartonii" (Fabricius, 1798) |work=Crayfish Taxon Browser |author=James W. Fetzner, Jr. |publisher=Carnegie Museum of Natural History |date=2006-12-06]

"Cambarus bartonii" is a species of crayfish native to eastern North America, where it is called the "common crayfish" or "Appalachian brook crayfish" cite web |url=http://www.natureserve.org/explorer/servlet/NatureServe?searchName=CAMBARUS+BARTONII+ |title=Comprehensive report: "Cambarus bartonii" - (Fabricius, 1798) |work=NatureServe Explorer |accessdate=2007-08-20] .

"C. bartonii" was the first crayfish to be dsescribed from North America, when Johan Christian Fabricius published it under the name "Astacus Bartonii" in his 1798 work "Supplementum entomologiae systematicae" cite journal |quotes=no |author=Horton H. Hobbs, Jr. |year=1942 |title=A generic revision of the crayfishes of the subfamily Cambarinae (Decapoda, Astacidae) with the description of a new genus and species |journal=American Midland Naturalist |volume=28 |issue=2 |pages=334–357 |url=http://links.jstor.org/sici?sici=0003-0031%28194209%2928%3A2%3C334%3AAGROTC%3E2.0.CO%3B2-O |doi=10.2307/2420820] . The locality where his specimen was captured is not known, but is thought to be near Philadelphia, Pennsylvania .

"C. bartonii" lives in fast–flowing, cool, rocky streams as well as shallow lakes [cite web |url=http://www.science.mcmaster.ca/Biology/Harbour/SPECIES/CRAYFISH/CRAYFISH.HTM |title=The Crayfish |publisher=McMaster University |author=Simone Rose |accessdate=2007-08-20] , and is found in the Canadian provinces of Ontario, Quebec and New Brunswick, and in the United States from Maine to Alabama . In the south of its range, "C. bartoni" is restricted to the Appalachian Mountains and their foothills .

Colouration is usually plain dark brown, although is occasionally seen, as is a saddle-shaped marking [cite web |url=http://www.ncwildlife.org/pg07_wildlifespeciescon/nccrayfishes/c_bartonii/c_bartonii.html |title="Cambarus" ("Cambarus") "bartonii" (Fabricius 1798) |author=Aimee H. Fullerton |work=The Crayfishes of North Carolina |accessdate=2007-08-20 |publisher=North Carolina Wildlife Resources Commission] .

Several subspecies of "C. bartonii" have been recognised, but it is unclear how advisable this is, and work is ongoing to determine patterns of infraspecific variation [cite web |url=http://www.tolweb.org/Cambarus_(Cambarus)_bartonii_carinirostris/6823 |title="Cambarus" ("Cambarus") "bartonii carinirostris" Hay 1914 |work=Tree of Life Web Project |date=2001-01-01 |author=Keith A. Crandall, James W. Fetzner, Jr., & Horton H. Hobbs, Jr.] .

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