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| Procambarus Tenuis |
Scientific Name : Procambarus Tenuis
Common Name/s: English – Ouachita Mountain Crayfish / Mountain Crayfish / Ouachita Crayfish
Native : United States (Arkansas, Oklahoma)
Procambarus Tenuis is a species of crayfish in the genus Procambarus in the family Cambaridae. It is the only species in the subgenus Procambarus (Tenuicambarus). P. tenuis is rare throughout its range, which is restricted to the Ouachita Mountains of Le Flore County, Oklahoma and Polk County, Arkansas
Kingdom : Animalia
Phylum : Arthropoda
Subphylum : Crustacea
Class : Malacostraca
Order : Decapoda
Family : Cambaridae
Genus : Procambarus
Subgenus : P. (Tenuicambarus) Hobbs, 1972
Species : Procambarus Tenuis
Coloration Procambarus Tenuis : Basic body coloration light tan with blackish speckles.
Size: Adults are approximately 3 to 5 inches (76-127 mm) in total length.
Habitat Procambarus Tenuis : This burrowing species has been collected from under rocks in clear cold streams, where it is apparently quite active even in very cold water (Williams, 1954). In this study P. tenuis was taken from simple burrows beneath rocks in a spring-fed runoff area in Arkansas and in spring-outflows under rocks in the Oklahoma portion of the ONF.
General Range: The range of Procambarus tenuis is the Arkansas, Ouachita, and Red River basins of eastern Oklahoma and western Arkansas (Hobbs, 1989).
Range Within Arkansas: Within the state, this Ouachita Mountains endemic species inhabits limited areas of the upper Ouachita, upper Little River tributaries (Red River drainage), and Arkansas River basins of western Arkansas.
The type locality of this species is six miles (9.6 km) east of Page and just west of the Oklahoma state line, LeFlore County, Oklahoma (Hobbs, 1950).
Procambarus Tenuis was collected four times during the study, twice in the Arkansas portion of the ONF and twice on the Oklahoma side. In Arkansas, one specimen was collected at the spring behind the Wonder House in Queen Wilhelmina State Park (Station 214) while a second specimen was taken from a roadside seepage area, 9.5 miles (15.3 km) northwest of Mena, Polk County (Station 213). In Oklahoma, two specimens of O. tenuis were found at the Billy Creek Recreation Area in the spring outflow there (Station 154) and four specimens were taken at Pipe Spring located north of Big Cedar (Station 155). These mark totally new known localities for this rarely seen Ouachita Mountain endemic crayfish. It is a very rare crayfish within the entire ONF as only eight specimens were taken in the four-year study.
Procambarus Tenuis has been assessed as Data Deficient. This species has a restricted range is uncommon in collections. However, it is unknown if it is impacted by any threats. Further work is needed to determine the extent of this species' range, it's abundance and the potential threats impacting the population before a more accurate assessment of conservation status can be made.
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