PERIPHERAL FISHES 



A peripheral species or subspecies is one whose occurrence in the United States is at 

 the edge of its natural range and which is threatened with extinction within the 

 United States although not in its range as a whole . Special attention is necessary to 

 assure retention in our Nation's fauna. 



Mexi :an StoneroUer, Campostoma ornatum 



Big Bend region of Rio Grande in Texas and in limited range in Arizona; 



comn on in Mexico . 



Suggested by National Park Service. 



Sonora Chub , Gila ditaenia 



Rio de la Concepcion in Mexico; Sycamore Canyon, Coronado National Forest, 



in southern Arizona. 



Suggested by Dr. Loye Miller, University of California. 



Chihuahua Shiner , Notropis chihuahua 



Rio Grand drainage in Texas and Mexico . 

 Suggested by National Park Service. 



Rio Grande Darter, Etheostoma grahami 



Tributaries of the Rio Grande in Mexico and Texas . 

 Suggested by Dr. Clark Hubbs, University of Texas. 



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