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
                        
                     Baetiscidae
               
            genus
                     Baetisca
            
                  “Armored Mayflies”
               
      Genus Overview
                  
               
                        This mayfly genus is widespread in North America. They are sprawlers and clingers in running water pools and margins (lotic-depositional streams) partially burrowing into silty bottoms and leaf litter, and feed by collecting or scraping organic matter.
                  
               Characteristics
                  
               POLLUTION TOLERANCE
                        Southeast: 1.4 and higher
                                 Upper Midwest: 5 and higher
                                 Mid-Atlantic: 4 and higher
                              0 = least tolerant, 10 = most tolerant
                        FEEDING HABITS
                        
                                 Collector / Gatherer
Scraper / Grazer
                        
                     Scraper / Grazer
MOVEMENT
                        
                                 Clinger
Sprawler
                        
                     Sprawler
DISTRIBUTION
                        
                                 Widespread (east of the Rocky Mtns.)
                        
                     HABITAT
                        
                                 Lotic-depositional
                        
                     Diagnostic Characters
               order
                         
                                       
                                       
                                    Abdominal Gills
                                  
                                       
                                       
                                    Single Tarsal Claw
                                  
                                       
                                       
                                    Usually 3 Tails
                                 family
                         
                                       
                                       
                                    Shield-like Pronotum
                                 
                  + 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:
                           Short, broad mayfly; the top of the pronotum forms a shield over the rest of the thorax and the basal segments of the abdomen; this shield often has a prominent pair of lateral spines.
                     
                     
                        Genus:
                           thoracic mesonotum enlarged to form a shield,
                     
                   
            Dorsal
               


