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
                        
                     Ptilodactylidae
               
            genus
                     Anchytarsus
            
                  “Toe-Winged Beetle Larvae”
               
      Genus Overview
                  
               
                        One species, Anchytarsus bicolor, in North America.  Found in small, cool, streams. Not much is known about the biology and ecology.  Life cycle might be 3 years. 
                  
               Characteristics
                  
               POLLUTION TOLERANCE
                        Southeast: 3.8 and higher
                              0 = least tolerant, 10 = most tolerant
                        FEEDING HABITS
                        
                                 Shredder / Detritivore
Shredder / Herbivore
                        
                     Shredder / Herbivore
MOVEMENT
                        
                                 Burrower
Clinger
                        
                     Clinger
DISTRIBUTION
                        
                                 Widespread (east of the Rocky Mtns.)
                        
                     HABITAT
                        
                                 Lotic-depositional
Lotic-erosional
                        
                     Lotic-erosional
Diagnostic Characters
               order
                         
                                       
                                       
                                    Eye Spots
                                  
                                       
                                       
                                    Lateral Gills USUALLY Absent
                                  
                                       
                                       
                                    USUALLY 4-5-Segmented Legs
                                 family
                         
                                       
                                       
                                    3 or Less Antennal Segments
                                  
                                       
                                       
                                    4-Segmented Legs
                                  
                                       
                                       
                                    9-Segmented Abdomen
                                  
                                       
                                       
                                    Distinct Labrum
                                  
                                       
                                       
                                    Operculum lacking
                                  
                                       
                                       
                                    Posterior Gill Tufts
                                 
                  + Expanded Character List
                  
                     
               
            
                        Order:
                           Larvae: Usually without lateral abdominal gills. If gills present, then 4 hooks clustered on segment 10. Thoracic legs each usually with 4 or 5 segments and with 1 or 2 claws; if without legs, head distinctly sclerotized and posterior body (thorax and abdomen) simple, without gills, hair brushes, suckers, or breathing tube. Eye spots usually present, but compound eyes absent.
                     
                     
                        Family:
                           Thoracic legs are present with each having four segments and a claw; the labrum is distinct; the abdomen has 9 segments and distinct tufts of gills in the anal region but without a lid-like operculum.
                     
                     
                        Genus:
                           Operculate covering on 9th segment absent, ninth abdominal segment with numerous finger like anal gills, 
                     
                   
                   
            Lateral
               Ventral
               


