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Page last updated
Thu 3 September 2025

The Freshwater Mussels (Unionoida) of the World (and other less consequential bivalves)

FM(U)otW(aolcb) is the web version of the MUSSEL Project Database. Follow the links to browse the data or use the custom Google search field. Either way, you win!

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Bivalvia | Unionida | Unionoidea | Unionidae | Ambleminae | Lampsilini

genus Villosa Frierson, 1927: cladomics
     4 Recent valid species (4 total species)

Cladomics Summary

number of species = 4 (4 total)
analyzed in 15 cladograms in 11 publications
maximum number of terminals in an analysis = 1 (mean = 1, median = 1)

Basic Monophyly

number of cladograms that test basic monophyly (i.e., more than 1 included species) = 0
maximum number of included terminals = , (mean = median = )
proportion of cladograms that support basic monophyly = 0


Campbell et al., 2005 [Publ 2660], fig. 1

** Top Monophyly Cladogram ** ** Top Sister-Group Cladogram **

iTtTbiriSoTroTroSiD
11011014222--
                       +-------- Toxolasma                     
  +--------------------+                                       
  |                    |  +----- Obliquaria                    
  |                    +--+                                    
  |                       |  +-- Cyrtonaias                    
  |                       +--+                                 
  |                          +-- Glebula                       
  |                                                            
  |              +-------------- Potamilus                     
  |              |                                             
  |              |     +-------- Medionidus_acutissimus        
--+              |  +--+                                       
  |  +-----------+  |  |  +----- Lemiox                        
  |  |           |  |  +--+                                    
  |  |           |  |     |  +-- Dromus                        
  |  |           |  |     +--+                                 
  |  |           +--+        +-- Cyprogenia                    
  |  |              |                                          
  |  |              |        +-- Sagittunio                    
  |  |              |     +--+                                 
  |  |              |     |  +-- Medionidus_conradicus         
  +--+              +-----+                                    
     |                    |  +-- Ptychobranchus                
     |                    +--+                                 
     |                       +-- Venustaconcha_ellipsiformis__2
     |                                                         
     |                       +-- Ellipsaria                    
     |  +--------------------+                                 
     |  |                    +-- Truncilla                     
     |  |                                                      
     |  |  +-------------------- Villosa_villosa **               
     +--+  |                                                   
        |  |                 +-- Obovaria_olivaria             
        |  |        +--------+                                 
        |  |        |        +-- Venustaconcha_ellipsiformis__1
        |  |  +-----+                                          
        +--+  |     |  +-------- Epioblasma                    
           |  |     +--+                                       
           |  |        |  +----- Obovaria_unicolor             
           |  |        +--+                                    
           |  |           |  +-- Obovaria_arkansasensis        
           |  |           +--+                                 
           |  |              +-- Obovaria_subrotunda           
           +--+                                                
              |        +-------- Hamiota                       
              |        |                                       
              |  +-----+     +-- Lampsilis_cardium             
              |  |     |  +--+                                 
              |  |     |  |  +-- Lampsilis_ovata               
              |  |     +--+                                    
              |  |        |  +-- Ortmanniana_pectorosa         
              +--+        +--+                                 
                 |           +-- Lampsilis_ornata              
                 |                                             
                 |           +-- Ligumia                       
                 |  +--------+                                 
                 |  |        +-- Cambarunio                    
                 +--+                                          
                    |  +-------- Lampsilis_teres               
                    +--+                                       
                       |  +----- Ortmanniana_ligamentina       
                       +--+                                    
                          |  +-- Lampsilis_siliquoidea         
                          +--+                                 
                             +-- Leaunio                       

Buhay et al., 2002 [Publ 2661], fig. 2A

iTtTbiriSoTroTroSiD
1101663--
  +----- Lampsilis      
  |                     
--+----- Epioblasma     
  |                     
  |  +-- Cambarunio     
  +--+                  
     +-- Villosa_villosa **

Roe et al., 2002 [Publ 2689], fig. 3a

iTtTbiriSoTroTroSiD
1101994--
  +----- Ligumia        
  |                     
  +----- Obliquaria     
--+                     
  +----- Lampsilis      
  |                     
  |  +-- Villosa_villosa **
  +--+                  
     +-- Hamiota        

Lydeard et al., 1996 [Publ 2656], fig. 3

iTtTbiriSoTroTroSiD
11012686--
  +-------------- Potamilus_fragilis  
  |                                   
--+  +----------- Ptychobranchus      
  |  |                                
  +--+  +-------- Medionidus          
     |  |                             
     +--+  +----- Potamilus_purpuratus
        |  |                          
        +--+----- Lampsilis           
           |                          
           |  +-- Ellipsaria          
           +--+                       
              +-- Villosa_delumbis **    

Inoue et al., 2013 [Publ 3528], fig. 3

iTtTbiriSoTroTroSiD
11011695--
  +-------- Lampsilis      
  |                        
--+  +----- Leaunio        
  |  |                     
  +--+----- Obovaria       
     |                     
     |  +-- Villosa_villosa **
     +--+                  
        +-- Cambarunio     

Turner et al., 2000 [Publ 2722], fig. 2

iTtTbiriSoTroTroSiD
11011382--
  +-------------------- Medionidus              
  |                                             
--+  +----------------- Lampsilis_teres         
  |  |                                          
  |  +----------------- Villosa_delumbis **        
  +--+                                          
     |              +-- Lampsilis_satura        
     |  +-----------+                           
     |  |           +-- Lampsilis_cardium       
     +--+                                       
        |  +----------- Lampsilis_reeveiana     
        |  |                                    
        +--+  +-------- Lampsilis_hydiana__1    
           |  |                                 
           +--+-------- Lampsilis_hydiana__2    
              |                                 
              |  +----- Lampsilis_siliquoidea__2
              +--+                              
                 |  +-- Lampsilis_siliquoidea__1
                 +--+                           
                    +-- Lampsilis_powellii      

Huang et al., 2002 [Publ 2657], fig. 2

iTtTbiriSoTroTroSiD
11013376--
  +-- Villosa_delumbis **
  |                   
  +-- Ellipsaria      
  |                   
--+-- Lampsilis       
  |                   
  +-- Potamilus       
  |                   
  +-- Ptychobranchus  

Lydeard et al., 1996 [Publ 2656], fig. 4

iTtTbiriSoTroTroSiD
11012786--
  +-------------------- Obliquaria          
--+                                         
  |  +----------------- Medionidus          
  +--+                                      
     |  +-------------- Ptychobranchus      
     +--+                                   
        |  +----------- Potamilus_fragilis  
        +--+                                
           |  +-------- Potamilus_purpuratus
           +--+                             
              |  +----- Ellipsaria          
              +--+                          
                 |  +-- Villosa_delumbis **    
                 +--+                       
                    +-- Lampsilis           

Krebs et al., 2003 [Publ 2691], fig. 3

iTtTbiriSoTroTroSiD
110132107--
           +----- Ptychobranchus       
  +--------+                           
  |        |  +-- Potamilus_fragilis   
  |        +--+                        
  |           +-- Medionidus           
--+                                    
  |           +-- Villosa_delumbis **     
  |  +--------+                        
  |  |        +-- Ellipsaria           
  +--+                                 
     |  +-------- Lampsilis_teres      
     +--+                              
        |  +----- Lampsilis_siliquoidea
        +--+                           
           |  +-- Potamilus_purpuratus 
           +--+                        
              +-- Potamilus_alatus     

Burlakova et al., 2019 [Publ 3899], fig. 1

iTtTbiriSoTroTroSiD
1101322517--
  +----------------- Toxolasma            
  |                                       
  |  +-------------- Potamilus            
  |  |                                    
  |  |           +-- Ellipsaria           
  |  +-----------+                        
--+  |           +-- Truncilla            
  |  |                                    
  |  |        +----- Medionidus           
  |  +--------+                           
  |  |        |  +-- Lemiox               
  |  |        +--+                        
  +--+           +-- Dromus               
     |                                    
     |  +----------- Cambarunio           
     |  |                                 
     |  +----------- Leaunio              
     |  |                                 
     |  +----------- Villosa_villosa **      
     |  |                                 
     |  |        +-- Sagittunio           
     |  +--------+                        
     +--+        +-- Lampsilis_ovata      
        |                                 
        |     +----- Venustaconcha        
        +-----+                           
        |     |  +-- Epioblasma           
        |     +--+                        
        |        +-- Obovaria             
        |                                 
        |  +-------- Lampsilis_teres      
        +--+                              
           |  +----- Lampsilis_siliquoidea
           +--+                           
              |  +-- Lampsilis_hydiana    
              +--+                        
                 +-- Lampsilis_straminea  

Patterson et al., 2021 [Publ 4222], fig. 3

iTtTbiriSoTroTroSiD
1101300--
-- Villosa_villosa **

Smith et al., 2019 [Publ 3951], fig. 2

iTtTbiriSoTroTroSiD
1101403519--
  +----------------------- Obliquaria             
  |                                               
  |                    +-- Medionidus             
  |                 +--+                          
  |                 |  +-- Lemiox                 
--+  +--------------+                             
  |  |              |  +-- Cyprogenia             
  |  |              +--+                          
  |  |                 +-- Ptychobranchus         
  |  |                                            
  +--+           +-------- Potamilus              
     |  +--------+                                
     |  |        |  +----- Atlanticoncha          
     |  |        +--+                             
     |  |           |  +-- Ellipsaria             
     |  |           +--+                          
     +--+              +-- Truncilla              
        |                                         
        |              +-- Hamiota                
        |  +-----------+                          
        |  |           +-- Villosa_villosa **        
        |  |                                      
        +--+  +----------- Ligumia                
           |  |                                   
           |  |     +----- Venustaconcha          
           +--+  +--+                             
              |  |  |  +-- Obovaria               
              |  |  +--+                          
              +--+     +-- Epioblasma             
                 |                                
                 |  +----- Ortmanniana_pectorosa  
                 +--+                             
                    |  +-- Ortmanniana_ligamentina
                    +--+                          
                       +-- Lampsilis              

Huang et al., 2002 [Publ 2657], fig. 1

iTtTbiriSoTroTroSiD
11013376--
  +----------------- Medionidus          
--+                                      
  |  +-------------- Potamilus_fragilis  
  +--+                                   
     |  +----------- Ptychobranchus      
     +--+                                
        |  +-------- Potamilus_purpuratus
        +--+                             
           |  +----- Lampsilis           
           +--+                          
              |  +-- Villosa_delumbis **    
              +--+                       
                 +-- Ellipsaria          

Campbell et al., 2005 [Publ 2660], fig. 2

iTtTbiriSoTroTroSiD
11011014222--
           +----- Obliquaria                    
  +--------+                                    
  |        |  +-- Cyrtonaias                    
  |        +--+                                 
  |           +-- Glebula                       
  |                                             
  |  +----------- Sagittunio                    
  |  |                                          
  |  +----------- Leaunio                       
  |  |                                          
  |  +----------- Potamilus                     
  |  |                                          
  |  +----------- Hamiota                       
  |  |                                          
  |  |        +-- Ellipsaria                    
--+  +--------+                                 
  |  |        +-- Truncilla                     
  |  |                                          
  |  |     +----- Lampsilis_teres               
  |  +-----+                                    
  |  |     |  +-- Ortmanniana_ligamentina       
  |  |     +--+                                 
  |  |        +-- Lampsilis_siliquoidea         
  |  |                                          
  |  |     +----- Villosa_villosa **               
  |  +-----+                                    
  |  |     |  +-- Ligumia                       
  |  |     +--+                                 
  |  |        +-- Cambarunio                    
  |  |                                          
  +--+  +-------- Ortmanniana_pectorosa         
     +--+                                       
     |  |  +----- Lampsilis_ornata              
     |  +--+                                    
     |     |  +-- Lampsilis_cardium             
     |     +--+                                 
     |        +-- Lampsilis_ovata               
     |                                          
     |  +-------- Obovaria_olivaria             
     |  |                                       
     |  +-------- Venustaconcha_ellipsiformis__2
     +--+                                       
     |  +-------- Epioblasma                    
     |  |                                       
     |  |  +----- Obovaria_unicolor             
     |  +--+                                    
     |     |  +-- Obovaria_arkansasensis        
     |     +--+                                 
     |        +-- Obovaria_subrotunda           
     |                                          
     |        +-- Ptychobranchus                
     |  +-----+                                 
     |  |     +-- Venustaconcha_ellipsiformis__1
     |  |                                       
     +--+  +----- Medionidus_conradicus         
        |  |                                    
        |  |  +-- Lemiox                        
        +--+--+                                 
           |  +-- Medionidus_acutissimus        
           |                                    
           |  +-- Dromus                        
           +--+                                 
              +-- Cyprogenia                    

Buhay et al., 2002 [Publ 2661], fig. 2B

iTtTbiriSoTroTroSiD
1101663--
  +----- Lampsilis      
  |                     
--+----- Epioblasma     
  |                     
  |  +-- Cambarunio     
  +--+                  
     +-- Villosa_villosa **
 
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