Cambarus dubius

Cambarus dubius sensu stricto is characterized by orange-ish coloration on the dorsal and lateral surfaces with cream coloration ventrally. The rostrum is deeply excavated. It lacks subpalmer tubercles on the chelae. Identification requires geographic context, as the species complex includes distinct forms now recognized as separate species; C. dubius s.s. is restricted to specific physiographic regions and should be distinguished from the blue-colored C. pauleyi and other peripatric populations with orange and black coloration found in the Meadow and Greenbrier River drainages.

Constructs burrow systems in upland terrestrial and semi-aquatic environments. Found in the central and northern portions of the Allegheny Mountains and high elevations of the Appalachian Plateau. Burrow structure is distinctive and has been used to predict species presence at unsurveyed sites.

Central and northern Allegheny Mountains and high elevations of the Appalachian Plateau in central West Virginia, western Maryland, and southcentral Pennsylvania. Historic records also include Kentucky, Tennessee, Virginia, and North Carolina, though these may represent broader species complex concepts. Distribution within Pennsylvania is limited and concentrated in the southwestern portion of the state.

Constructs burrows with distinctive structural characteristics that allow field identification of occupied sites without specimen collection. Faces conservation and management challenges due to limited baseline ecological and distribution data.

Subject to conservation assessment efforts due to limited distribution data and potential habitat vulnerability. Populations may be threatened by wetland conversion to pasture and other land use changes. The species serves as an indicator of groundwater ecosystem health in Appalachian headwater systems.

• Cambarus pauleyiFormerly confused within the C. dubius species complex; distinguished by blue dorsal coloration (vs. orange in C. dubius s.s.), larger palm depth/palm length ratio, smaller rostral width/rostral length ratio, and presence of two subpalmer tubercles (absent in C. dubius)
• Peripatric C. dubius populations (Meadow and Greenbrier River drainages)Occur sympatrically with C. pauleyi; distinguished from C. dubius s.s. by orange and black coloration (vs. orange and cream), and from C. pauleyi by lacking subpalmer tubercles and having different rostral excavation depth

• crayfish
• burrowing crayfish
• Appalachian fauna
• species complex
• conservation
• groundwater indicator
• Cambaridae
• Decapoda
• crustacean
• endemic
• North America
• United States
• West Virginia
• Pennsylvania
• Maryland
• terrestrial crayfish
• primary burrower

• BugGuide
• Wikipedia
• GBIF taxonomy match
• iNaturalist taxon
• NCBI Taxonomy
• Catalogue of Life
• Encyrtid Holdings | Entomology Research Museum
• Study: More IPM Knowledge Could Help Leafy Amaranth Farmers in East Africa
• Small, rare crayfish thought extinct is rediscovered
• Distribution, natural history, and conservation of Cambarus dubius in Pennsylvania
• Ecology ofCambarus dubius(Upland Burrowing Crayfish) in North-Central West Virginia
• Conservation Assessment of Cambarus dubius in Pennsylvania with Distribution Notes on Lacunicambarus thomai.
• Cambarus (Jugicambarus) pauleyi, a new species of crayfish (Decapoda: Cambaridae) endemic to southcentral West Virginia, USA, with a re-description of Cambarus (J.) dubius