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
                        
                     Nemouridae
               
            genus
                     Amphinemura
            
                  “Spring Stoneflies, Forestflies”
               
      Genus Overview
                  
               
                        There are 16 North American species in this genus. Mature larvae are 5-8 mm in length. It is believed that all eastern species have a univoltine life cycle, having only one generation per year. Eggs often go through a diapause for up to 6 months. Larvae grow slowly during the cold part of the year, and faster when it is warm. Larvae emerge as adults in the Spring or Fall depending on the species. There has been little study on larval feeding habits, although they are thought to be mostly shredding detritivores. They are usually found in lotic-erosional and depositional habitats in detritus. They can be separated from other Nemourid genera by their paired cervical gills with 5 or more branches, arising from the base, each filament subequal in length.
                  
               Characteristics
                  
               POLLUTION TOLERANCE
                        Southeast: 3.4
                                 Upper Midwest: 3
                              0 = least tolerant, 10 = most tolerant
                        FEEDING HABITS
                        
                                 Collector / Gatherer
Shredder / Detritivore
                        
                     Shredder / Detritivore
MOVEMENT
                        
                                 Clinger
Sprawler
                        
                     Sprawler
DISTRIBUTION
                        
                                 Widespread (east of the Rocky Mtns.)
                        
                     HABITAT
                        
                                 Lotic-depositional
Lotic-erosional
                        
                     Lotic-erosional
Diagnostic Characters
               order
                         
                                       
                                       
                                    Two Tails
                                  
                                       
                                       
                                    Two Tarsal Claws
                                 family
                         
                                       
                                       
                                    Divergent Hind Wing Pads 
                                  
                                       
                                       
                                    Hind Legs Reach
                                  
                                       
                                       
                                    Paraglossae And Glossae Subequal
                                 genus
                         
                                       
                                       
                                    Cervical Gills
                                 
                  + 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:
                           Larvae generally small (less than 12 mm long), robust, and hairy. Paraglossae and glossae about same length, suitable for shredding. Hind wing pads conspicuously divergent from body axis. First tarsal segment of each leg much longer than second. When extended, hind legs reach beyond end of abdomen.
                     
                     
                        Genus:
                           A pair of gills emerge from the cervical sclerites; each cervical gill has 5 or more filamentous branches of about the same length, and all originating at the same place on the base of the gill.
                     
                   
                   
            Dorsal
               Ventral
               


