Tennessee River and Crawfish Distribution 



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Gulf of Mexico 



Fig. 7. Distribution of non-Mexican Cambarellus. (After Fitzpatrick 1983.) 

 Arrow as in Figure 1. Horizontal ruling = subgenus Dirigicambarus; vertical 

 rulings = subgenus Pandicambarus; crosses indicate small allopatric, probably 

 introduced, populations of Cs. (D.) shufeldtii. 



entirely different fauna in these habitats, and the latter two faunae are 

 more closely related to each other than either is to the lower Coastal 

 Plain species. 



Procambarus {Capillicambarus) and most of Fallicambarus are 

 west of the area in question. Procambarus (C) hinei (Ortmann) occurs 

 as far east as the Florida Parishes of Louisiana, but most of the distri- 

 bution of the subgenus is in Louisiana and Texas. The range of the 

 more primitive Fallicambarus suggests origin of the genus west of the 

 Mississippi River with expansion from there. Fallicambarus fodiens is 

 widespread, occurring from lower Ontario to Arkansas and Alabama. 

 Fallicambarus uhleri is a species of the Atlantic Coastal Plain, and F. 

 hortoni Hobbs and Fitzpatrick is apparently of restricted distribution 

 north of the lower Gulf Coastal Plain (Fig. 8). Fallicambarus hedgpethi 

 (Hobbs) scarcely crosses to the east bank of the Mississippi River above 

 the delta region, but it can be found in relatively recent deposits all the 

 way to southwestern Georgia. The latter species and F. fodiens require 

 thorough taxonomic study before firm conclusions about their distribu- 

 tions can be made. 



