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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 | Unioninae | Unionini

subtribe MIDDENDORFFINAIINA Lopes-Lima, Bolotov & Bogan in Lopes-Lima et al., 2020: cladomics
     1 genus

Cladomics Summary

number of species = 1 (1 total)
number of subtaxa (rank: genus) = 1
analyzed in 22 cladograms in 14 publications
maximum number of terminals in an analysis = 1 (mean = 1, median = 1)
maximum number of subtaxa (genus) = 1 (mean = 1, median = 1)


Campbell & Lydeard, 2026 [Publ 4810], fig. 6-14

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

iTtTbiriSoTroTroSiD
1101631664--
  +----------- Globunionina    
--+                            
  |  +-------- Aculamprotulina 
  +--+                         
     |  +----- Middendorffinaia **
     +--+                      
        |  +-- Unionina        
        +--+                   
           +-- Oxynaiina       

Wang et al., 2025 [Publ 4488], fig. 3B

iTtTbiriSoTroTroSiD
110164323--
  +-------- Aculamprotulina 
--+                         
  |  +----- Unionina        
  +--+                      
     |  +-- Middendorffinaia **
     +--+                   
        +-- Oxynaiina       

Wu et al., 2026 [Publ 4811], fig. 4

iTtTbiriSoTroTroSiD
110195324--
  +----------- Globunionina    
--+                            
  |  +-------- Aculamprotulina 
  +--+                         
     |  +----- Unionina        
     +--+                      
        |  +-- Middendorffinaia **
        +--+                   
           +-- Oxynaiina       

Dai et al., 2024 [Publ 4386], fig. 3

iTtTbiriSoTroTroSiD
110113103--
  +-- Middendorffinaia **
--+                   
  +-- Oxynaiina       

Hou et al., 2025 [Publ 4432], fig. 3

iTtTbiriSoTroTroSiD
11011091--
  +-------- Tchangsinaia    
--+                         
  |  +----- Pseudocuneopsis 
  +--+                      
     |  +-- Middendorffinaia **
     +--+                   
        +-- Cuneopsis       

Hou et al., 2025 [Publ 4432], fig. 4

iTtTbiriSoTroTroSiD
110127251--
  +-- Middendorffinaia **
--+                   
  +-- Oxynaiina       

Dai et al., 2024 [Publ 4386], fig. 5-ML

iTtTbiriSoTroTroSiD
110121113--
  +-------- Aculamprotulina 
--+                         
  |  +----- Unionina        
  +--+                      
     |  +-- Middendorffinaia **
     +--+                   
        +-- Oxynaiina       

Lopes-Lima et al., 2020 [Publ 4080], fig. 2-4

iTtTbiriSoTroTroSiD
1101121273--
  +-------- Aculamprotulina 
--+                         
  |  +----- Middendorffinaia **
  +--+                      
     |  +-- Unionina        
     +--+                   
        +-- Oxynaiina       

Dai et al., 2025 [Publ 4440], fig. 1

iTtTbiriSoTroTroSiD
110144214--
  +----------------------- Globunionina    
  |                                        
--+  +-------------------- Aculamprotulina 
  |  |                                     
  +--+  +----------------- Middendorffinaia **
     |  |                                  
     +--+  +-------------- Nodularia       
        |  |                               
        +--+  +----------- Cuneopsis       
           |  |                            
           |  |        +-- Diaurora        
           +--+--------+                   
              |        +-- Schistodesmus   
              |                            
              |  +-------- Pseudocuneopsis 
              +--+                         
                 |  +----- Unionina        
                 +--+                      
                    |  +-- Tchangsinaia    
                    +--+                   
                       +-- Inversiunio     

Campbell & Lydeard, 2026 [Publ 4810], fig. 3_5

iTtTbiriSoTroTroSiD
1101140464--
  +----------- Aculamprotulina 
--+                            
  |  +-------- Globunionina    
  +--+                         
     |  +----- Oxynaiina       
     +--+                      
        |  +-- Middendorffinaia **
        +--+                   
           +-- Unionina        

Klishko et al., 2019 [Publ 3886], fig. 9

iTtTbiriSoTroTroSiD
11011072--
  +----- Unionina        
--+                      
  |  +-- Middendorffinaia **
  +--+                   
     +-- Oxynaiina       

Dai et al., 2025 [Publ 4440], fig. 2

iTtTbiriSoTroTroSiD
110144214--
  +-------------------- Globunionina    
  |                                     
--+  +----------------- Aculamprotulina 
  |  |                                  
  |  |              +-- Middendorffinaia **
  +--+  +-----------+                   
     |  |           +-- Nodularia       
     |  |                               
     +--+  +----------- Cuneopsis       
        |  |                            
        |  |        +-- Diaurora        
        +--+--------+                   
           |        +-- Schistodesmus   
           |                            
           |  +-------- Pseudocuneopsis 
           +--+                         
              |  +----- Inversiunio     
              +--+                      
                 |  +-- Tchangsinaia    
                 +--+                   
                    +-- Unionina        

Hou et al., 2025 [Publ 4401], fig. 4

iTtTbiriSoTroTroSiD
110127251--
  +-- Middendorffinaia **
--+                   
  +-- Oxynaiina       

Sayenko et al., 2021 [Publ 4189], fig. 6

iTtTbiriSoTroTroSiD
110112122--
  +-------- Unionina        
--+                         
  |  +----- Inversiunio     
  +--+                      
     |  +-- Middendorffinaia **
     +--+                   
        +-- Nodularia       

Hou et al., 2024 [Publ 4400], fig. 1

iTtTbiriSoTroTroSiD
110114121--
           +----- Cuneopsis_rufescens   
  +--------+                            
  |        |  +-- Middendorffinaia **      
  |        +--+                         
--+           +-- Pseudocuneopsis       
  |                                     
  |  +----------- Tchangsinaia          
  |  |                                  
  +--+        +-- Cuneopsis_kiangsiensis
     |  +-----+                         
     |  |     +-- Cuneopsis_celtiformis 
     +--+                               
        |  +----- Cuneopsis_szechenyii  
        +--+                            
           |  +-- Cuneopsis_heudei      
           +--+                         
              +-- Cuneopsis_demangei    

Konopleva et al., 2023 [Publ 4269], fig. S1_4

iTtTbiriSoTroTroSiD
110155113--
  +-------- Middendorffinaia **
--+                         
  |  +----- Aculamprotulina 
  +--+                      
     |  +-- Unionina        
     +--+                   
        +-- Oxynaiina       

Chen et al., 2023 [Publ 4302], fig. 1

iTtTbiriSoTroTroSiD
110140173--
  +----------------- Aculamprotulina 
  |                                  
  |              +-- Middendorffinaia **
--+  +-----------+                   
  |  |           +-- Nodularia       
  |  |                               
  +--+  +----------- Cuneopsis       
     |  |                            
     |  |        +-- Diaurora        
     +--+--------+                   
        |        +-- Schistodesmus   
        |                            
        |  +-------- Pseudocuneopsis 
        +--+                         
           |  +----- Inversiunio     
           +--+                      
              |  +-- Tchangsinaia    
              +--+                   
                 +-- Unionina        

Hou et al., 2024 [Publ 4400], fig. 4

iTtTbiriSoTroTroSiD
110175483--
  +-------- Aculamprotulina 
--+                         
  |  +----- Unionina        
  +--+                      
     |  +-- Middendorffinaia **
     +--+                   
        +-- Oxynaiina       

Lopes-Lima et al., 2020 [Publ 4080], fig. 13

iTtTbiriSoTroTroSiD
1101971--
  +-- Middendorffinaia **
--+                   
  +-- Oxynaiina       

Dai et al., 2024 [Publ 4386], fig. 5-BI

iTtTbiriSoTroTroSiD
110121113--
  +----- Unionina        
--+                      
  |  +-- Middendorffinaia **
  +--+                   
     +-- Oxynaiina       

Chen et al., 2023 [Publ 4302], fig. 2

iTtTbiriSoTroTroSiD
110140173--
  +----------------- Aculamprotulina 
  |                                  
  |              +-- Middendorffinaia **
--+  +-----------+                   
  |  |           +-- Nodularia       
  |  |                               
  +--+  +----------- Cuneopsis       
     |  |                            
     |  |        +-- Diaurora        
     +--+--------+                   
        |        +-- Schistodesmus   
        |                            
        |  +-------- Pseudocuneopsis 
        +--+                         
           |  +----- Inversiunio     
           +--+                      
              |  +-- Tchangsinaia    
              +--+                   
                 +-- Unionina        

Bolotov et al., 2020 [Publ 4084], fig. 1

iTtTbiriSoTroTroSiD
11013542--
  +----- Middendorffinaia **
--+                      
  |  +-- Oxynaiina       
  +--+                   
     +-- Unionina        
 
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