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
                        
                     Siphlonuridae
               
            genus
                     Siphlonurus
            
                  “Primitive Minnow Mayflies”
               
      Genus Overview
                  
               
                        19 species in North America. Not commonly collected. Can be confused with other families of mayflies like Baetidae and Ameletidae. The genus is noted by the double lamellae of the gills. Typically found in slower to almost no current depositional habitats of streams and rivers. 
                  
               Characteristics
                  
               POLLUTION TOLERANCE
                        Southeast: 2.6 and higher
                                 Upper Midwest: 7 and higher
                              0 = least tolerant, 10 = most tolerant
                        FEEDING HABITS
                        
                                 Collector / Gatherer
                        
                     MOVEMENT
                        
                                 Climber
Swimmer
                        
                     Swimmer
DISTRIBUTION
                        
                                 Widespread (east of the Rocky Mtns.)
                        
                     HABITAT
                        
                                 Lentic-littoral
Lotic-depositional
                        
                     Lotic-depositional
Diagnostic Characters
               order
                         
                                       
                                       
                                    Abdominal Gills
                                  
                                       
                                       
                                    Single Tarsal Claw
                                  
                                       
                                       
                                    Usually 3 Tails
                                 family
                         
                                       
                                       
                                    3 "Tails" Subequal
                                  
                                       
                                       
                                    Distal Margin of Labrum Straight
                                  
                                       
                                       
                                    Gills on 1-7 Plate-like
                                  
                                       
                                       
                                    Short Antennae
                                 genus
                         
                                       
                                       
                                    Gills on segment 1 and 2 with double gills
                                 
                  + Expanded Character List
                  
                     
               
            
                        Order:
                           Wings developing in wing pads. Mouthparts suitable for chewing. Gills present on tops and sides of abdomen. Segmented legs present. One tarsal claw per leg. Usually with 3 tails (sometimes 2).
                     
                     
                        Family:
                           The labrum (upper lip) is not notched in the middle; the antennae are shorter than twice the width of the head; the maxillae on the underside of the head lack prominent rows of golden spines; the abdominal gills are rounded and similar to each other in structure; 3 long slender filaments at the end of the body are about equally long.
                     
                     
                        Genus:
                           Double lamellae gills, mid sized mayfly, very patterned, antennae short
                     
                   
                   
            Dorsal
               Ventral
               


