Lower Boise Lower Snake-Asotin Pacific Northwest RegionĬhicago Des Plaines Lake Michigan The Sny Upper Fox
Hawaii Hawaii Region Kauai Maui Molokai Oahu Simons Etowah Middle Chattahoochee-Walter F Oostanaula Satilla Upper Chattahoochee Upper Coosa Upper Flint Upper Ocmulgee Upper Oconee Hassayampa Lower Colorado Lower Salt Upper San PedroĪliso-San Onofre California California Region Central California Coastal Clear Creek-Sacramento River Crowley Lake Fresno River Imperial Reservoir Los Angeles Lower American Lower Colorado Lower Sacramento Mad-Redwood Middle Kern-Upper Tehachapi-Grapevine Mojave Owens Lake Russian Salinas San Diego San Francisco Bay San Gabriel San Joaquin San Luis Rey-Escondido Santa Ana Santa Ana Santa Barbara Coastal Santa Monica Bay Southern California Coastal Suisun Bay Tulare-Buena Vista Lakes Upper Coon-Upper Auburn Upper Mokelumne Upper Tuolumneīrandywine-Christina Broadkill-Smyrna ChincoteagueĬumberland-St. The list of references for all nonindigenous occurrences of Procambarus clarkii are found here.
Names and dates are hyperlinked to their relevant specimen records. States with nonindigenous occurrences, the earliest and latest observations in each state, and the tally and names of HUCs with observations†. Interactive maps: Point Distribution Maps Juveniles are not red and are difficult to distinguish from other Procambarus species (Boets et al. Strong spines project from the inner face of the sixth joint (propodite) “knots” are present on the dorsal face or this joint (Boets et al.
The right pleopod is wrapped around the side, such that it appears reduced or absent, and possesses a spur on the inner margin on its fifth joint (carpopodite) (WDFW 2003). Setae on the anterior surface of the pleopod, closest to the terminal elements, have strong angular shoulders. In reproductively mature males, hooks are present on the third segment (from the base the ischia) of the third and fourth pairs of walking legs, and the first swimmeret (pleopod) of ends in four projections (terminal elements), with the most anterior terminal end (cephalic process) of this sperm transfer structure rounded with a sharp angle on the outer (caudodistal) margin, which lacks “hairs” (setae) below its tip. The first walking leg (cheliped) bears bright red rows of bumps (tubercles) on its side (mesial) margin and palm. Identification: The red swamp crayfish is typically dark red, with elongate claws (chelae) and head, a triangular rostrum tapering anteriorly without a central keel, reduced or absent spines on the side of the shell (carapace) between the head and thorax, and a linear to obliterate dorsal surface between the 2 carapace plates (areola), which converge (Boets et al.
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