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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 | Popenaiadini

genus Psoronaias Crosse & Fischer, 1894: cladomics
     5 Recent valid species (5 total species)

Cladomics Summary

number of species = 5 (5 total)
analyzed in 10 cladograms in 7 publications
maximum number of terminals in an analysis = 2 (mean = 1.5, median = 1.5)

Basic Monophyly

number of cladograms that test basic monophyly (i.e., more than 1 included species) = 5
maximum number of included terminals = 2, (mean = 2 median = 2)
proportion of cladograms that support basic monophyly = 1


Pairwise Cladogram Clustering

The graphs below depict in two dimensions all pair-wise ingroup distances within the cladome. See the Cladmoics FARQ for more information.


PCoA Ordination


NJ Tree


Inoue et al., 2020 [Publ 4128], fig. 2

** Top Monophyly Cladogram **

iTtTbiriSoTroTroSiD
22072131--
  +----- Popenaias                  
  |                                 
  |  +-- Psoronaias_crocodilorum__1 ** 
  |  |                              
--+  +-- Psoronaias_crocodilorum__2 ** 
  |  |                              
  |  +-- Psoronaias_crocodilorum__3 ** 
  |  |                              
  +--+-- Psoronaias_guatemalensis__1 **
     |                              
     +-- Psoronaias_guatemalensis__2 **
     |                              
     +-- Psoronaias_crocodilorum__4 ** 
     |                              
     +-- Psoronaias_crocodilorum__5 ** 

Martínez et al., 2026 [Publ 4820], fig. 2

** Top Sister-Group Cladogram **

iTtTbiriSoTroTroSiD
11011552--
  +-------- Nephronaias_hjalmarsoni   
--+                                   
  |  +----- Psoronaias_guatemalensis **  
  +--+                                
     |  +-- Nephronaias_goascoranensis
     +--+                             
        +-- Nephronaias_tempisquensis 

Freeman et al., 2025 [Publ 4443], fig. 2

iTtTbiriSoTroTroSiD
2203422--
  +----------- Popenaias                 
--+                                      
  |  +-------- Nephronaias               
  +--+                                   
     |  +----- Psoronaias_crocodilorum__2 **
     +--+                                
        |  +-- Psoronaias_crocodilorum__1 **
        +--+                             
           +-- Psoronaias_guatemalensis **  

Inoue et al., 2020 [Publ 4128], fig. 3

iTtTbiriSoTroTroSiD
22062031--
  +-------------- Popenaias                  
  |                                          
--+  +----------- Psoronaias_crocodilorum__4 ** 
  |  |                                       
  +--+        +-- Psoronaias_crocodilorum__1 ** 
     |  +-----+                              
     |  |     +-- Psoronaias_guatemalensis__1 **
     +--+                                    
        |  +----- Psoronaias_crocodilorum__3 ** 
        +--+                                 
           |  +-- Psoronaias_guatemalensis__2 **
           +--+                              
              +-- Psoronaias_crocodilorum__2 ** 

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

iTtTbiriSoTroTroSiD
220563042--
  +-------- Nephronaias               
  |                                   
--+  +----- Psoronaias_crocodilorum__4 **
  |  |                                
  +--+  +-- Psoronaias_guatemalensis **  
     |  |                             
     |  +-- Psoronaias_crocodilorum__1 **
     +--+                             
        +-- Psoronaias_crocodilorum__2 **
        |                             
        +-- Psoronaias_crocodilorum__3 **

Pfeiffer et al., 2019 [Publ 3866], fig. 1

iTtTbiriSoTroTroSiD
22032911--
  +-------- Popenaias                  
--+                                    
  |  +----- Psoronaias_guatemalensis__2 **
  +--+                                 
     |  +-- Psoronaias_crocodilorum **    
     +--+                              
        +-- Psoronaias_guatemalensis__1 **

Smith et al., 2020 [Publ 4129], fig. 2-3

iTtTbiriSoTroTroSiD
11012711--
  +-- Popenaias              
--+                          
  +-- Psoronaias_crocodilorum **

Pfeiffer et al., 2019 [Publ 3937], fig. 4-5

iTtTbiriSoTroTroSiD
11015611--
  +-- Psoronaias_crocodilorum **
--+                          
  +-- Popenaias              

Pfeiffer et al., 2019 [Publ 3937], fig. 6

iTtTbiriSoTroTroSiD
11015611--
  +-- Psoronaias_crocodilorum **
--+                          
  +-- Popenaias              

Smith et al., 2020 [Publ 4129], fig. 1

iTtTbiriSoTroTroSiD
11012711--
  +-- Popenaias              
--+                          
  +-- Psoronaias_crocodilorum **
 
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