order
                        
                      
                                    Coleoptera
                                       “Adult Beetles”
                                  
                                    Coleoptera
                                       “Larval Beetles”
                                  
                                    Diptera
                                       “True Flies”
                                  
                                    Ephemeroptera
                                       “Mayflies”
                                  
                                    Hemiptera
                                       “True Bugs”
                                  
                                    Lepidoptera
                                       “Aquatic Caterpillars, Snout Moths”
                                  
                                    Megaloptera
                                       “Alderflies, Dobsonflies, and Fishflies”
                                  
                                    Odonata
                                       “Dragonflies and Damselflies”
                                  
                                    Plecoptera
                                       “Stoneflies”
                                  
                                    Trichoptera
                                       “Caddisflies”
                                 family
                        
                     Perlidae
               
            Neoperla
            
                  “Common Stoneflies”
               
      Genus Overview
                  
               
                          Of the 15 species of Neoperla, only one detailed study of the biology of Neoperla clymene in Texas has not been studied.  The larvae tend to be more in the open gravel beds compared to leafpacks. This predator can be separated from others in the family by the two ocelli on the head and a transverse elevated ridge.    
                  
               Characteristics
                  
               POLLUTION TOLERANCE
                        Southeast: 1.6
                                 Upper Midwest: 1
                                 Midwest: 3.1
                              0 = least tolerant, 10 = most tolerant
                        FEEDING HABITS
                        
                                 Engulfer / Predator
                        
                     MOVEMENT
                        
                                 Clinger
                        
                     DISTRIBUTION
                        
                                 Widespread (east of the Rocky Mtns.)
                        
                     HABITAT
                        
                                 Lotic-erosional
                        
                     Diagnostic Characters
               order
                         
                                       
                                       
                                    Two Tails
                                  
                                       
                                       
                                    Two Tarsal Claws
                                 family
                         
                                       
                                       
                                    Glossae Shorter Than Paraglossae
                                  
                                       
                                       
                                    Thoracic Gills
                                 genus
                         
                                       
                                       
                                    Occipital Ridge
                                  
                                       
                                       
                                    Two Ocelli
                                 
                  + Expanded Character List
                  
                     
               
            
                        Order:
                           Wings developing in wing pads. Mouthparts suitable for chewing. Gills digitiform and located near mouthparts, on neck, sides of thorax, or underside of base of abdomen, never on top or sides of abdomen. Two tarsal claws per leg. Only two tails (cerci).
                     
                     
                        Family:
                           Glossae much shorter than the paraglossae. Multi-branched, filamentous gills present laterally and ventrally on thorax, but not on abdomen.
                     
                     
                        Genus:
                           Two ocelli, Occiciptal ridge present
                     
                   
                   
            Dorsal
               Ventral
               


