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
                        
                     Ephemeridae
               
            
                  “Burrowing Mayflies”
               
      Genus Overview
                  
               
                        6 species in North America (1 recently believed to be extinct).  Species within the genus are found in various habitats.  One species is found in large rivers and even some lakes and ponds and another species prefers cool, shallow streams.  The genus is fairly easy to identify. 
                  
               Characteristics
                  
               POLLUTION TOLERANCE
                        Southeast: 1.1 and higher
                                 Upper Midwest: 1 and higher
                                 Midwest: 3.1 and higher
                              0 = least tolerant, 10 = most tolerant
                        FEEDING HABITS
                        
                                 Collector / Filterer
Collector / Gatherer
Engulfer / Predator
                        
                     Collector / Gatherer
Engulfer / Predator
MOVEMENT
                        
                                 Burrower
                        
                     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
                         
                                       
                                       
                                    Fluffy Abdominal Gills
                                  
                                       
                                       
                                    Fossorial Foretibiae 
                                  
                                       
                                       
                                    Large Tusks
                                  
                                       
                                       
                                    Pointed Hind Tibiae
                                 
                  + 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:
                           Large tusks project forward anteriorly from the face and are visible dorsally, when viewed laterally they curve upward. Foretibiae are fossorial (modified for burrowing: expanded or with tubercles). Ventral apex of each hind tibia acutely pointed. Abdominal gills on segments 2–7 are conspicuous dorsally, forked and elongate-lancolate, with fringed margins, giving the animal a fluffy appearance.
                     
                     
                        Genus:
                           Large feathery gills, large tusks, bifid (forked) frontal process on the head, 
                     
                   
                   
            Dorsal
               Lateral
               


