Bivalvia | Unionida | Unionoidea | Unionidae | Unioninae | Anodontini | Alasmidontina

genus Arcidens Simpson, 1900: cladomics

2 Recent valid species (3 total species)

Cladomics pages are experimental — even more so than the rest of this site!

The purpose of the cladomics pages for each genus and family-group level taxon is to provide statistics and references indicating the extent to which published phylogenetic work supports the classification used here.

The Cladomics Summary provides an overview of the number of studies that have included terminal species representing this taxon as well as an indication of how frequently it has been recovered as monophyletic.

Following the summary, the available published clades representing the taxon are listed.

For more information, visit the Cladomics FARQ (frequently asked rhetorical questions) page. Abbreviations for the various statistics are explained on the FARQ!

Cladomics Summary

number of species = 2 (3 total)
analyzed in 12 cladograms in 8 publications
maximum number of terminals in an analysis = 2 (mean = 1.58, median = 2)

Basic Monophyly

number of cladograms that test basic monophyly (i.e., more than 1 included species) = 7
maximum number of included terminals = 2, (mean = 2 median = 2)
proportion of cladograms that support basic monophyly = 0.86

Cladograms

Perkins et al., 2025 [Publ 4447], fig. 2_mtDNA-ITS

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

iTtTbiriSoTroTroSiD
2 2 0 2 34 31 14 -- 
     +----------------- Utterbackiana       
  +--+                                      
  |  |  +-------------- Alasminota          
  |  +--+                                   
  |     |  +----------- Pseudodontoideus    
  |     +--+                                
  |        |  +-------- Lasmigona           
  |        +--+                             
  |           |  +----- Pterosyna           
  |           +--+                          
  |              |  +-- Arcidens_confragosus **
--+              +--+                       
  |                 +-- Arcidens_wheeleri **   
  |                                         
  |                 +-- Prolasmidonta       
  |              +--+                       
  |              |  +-- Platynaias          
  |        +-----+                          
  |        |     |  +-- Ligodonta           
  |        |     +--+                       
  |        |        +-- Alasmidonta         
  +--------+                                
           |        +-- Anodontoides        
           |  +-----+                       
           |  |     +-- Strophitus          
           +--+                             
              |  +----- Sulcularia          
              +--+                          
                 |  +-- Pyganodon           
                 +--+                       
                    +-- Utterbackia

Whelan et al., 2023 [Publ 4287], fig. 4

iTtTbiriSoTroTroSiD
2 2 0 2 25 23 10 -- 
  +-------------------- Sulcularia          
  |                                         
  |        +----------- Utterbackiana       
  |  +-----+                                
--+  |     |  +-------- Alasminota          
  |  |     +--+                             
  |  |        |  +----- Pseudodontoideus    
  |  |        +--+                          
  +--+           |  +-- Arcidens_confragosus **
     |           +--+                       
     |              +-- Arcidens_wheeleri **   
     |                                      
     |  +-------------- Alasmidonta         
     +--+                                   
        |  +----------- Platynaias          
        +--+                                
           |  +-------- Strophitus          
           +--+                             
              |  +----- Pyganodon           
              +--+                          
                 |  +-- Utterbackia         
                 +--+                       
                    +-- Anodontoides

Inoue et al., 2014 [Publ 3635], fig. 3B

iTtTbiriSoTroTroSiD
2 2 0 2 6 5 2 -- 
  +-------- Pyganodon_grandis   
  |                             
  +-------- Pyganodon_cataracta 
  |                             
--+-------- Pyganodon_fragilis  
  |                             
  +-------- Pyganodon           
  |                             
  |  +----- Platynaias          
  +--+                          
     |  +-- Arcidens_confragosus **
     +--+                       
        +-- Arcidens_wheeleri **

Whelan et al., 2023 [Publ 4287], fig. 2

iTtTbiriSoTroTroSiD
2 2 0 2 39 31 13 -- 
                 +-- Utterbackia         
  +--------------+                       
  |              +-- Pyganodon           
  |                                      
  |     +----------- Utterbackiana       
  |     |                                
  |  +--+        +-- Lasmigona           
--+  |  |  +-----+                       
  |  |  |  |     +-- Pseudodontoideus    
  |  |  +--+                             
  |  |     |  +----- Pterosyna           
  |  |     +--+                          
  |  |        |  +-- Arcidens_confragosus **
  +--+        +--+                       
     |           +-- Arcidens_wheeleri **   
     |                                   
     |        +----- Sulcularia          
     |     +--+                          
     |     |  |  +-- Anodontoides        
     |     |  +--+                       
     |     |     +-- Strophitus          
     +-----+                             
           |     +-- Prolasmidonta       
           |  +--+                       
           |  |  +-- Platynaias          
           +--+                          
              |  +-- Alasminota          
              +--+                       
                 +-- Alasmidonta

Whelan et al., 2023 [Publ 4287], fig. 3

iTtTbiriSoTroTroSiD
2 2 0 2 26 25 11 -- 
  +-------------------- Utterbackiana       
  |                                         
  |                 +-- Utterbackia         
--+  +--------------+                       
  |  |              +-- Pyganodon           
  |  |                                      
  |  |        +-------- Alasmidonta         
  +--+  +-----+                             
     |  |     |  +----- Pseudodontoideus    
     |  |     +--+                          
     |  |        |  +-- Arcidens_confragosus **
     +--+        +--+                       
        |           +-- Arcidens_wheeleri **   
        |                                   
        |  +----------- Alasminota          
        |  |                                
        +--+        +-- Anodontoides        
           |  +-----+                       
           |  |     +-- Strophitus          
           +--+                             
              |  +----- Sulcularia          
              +--+                          
                 |  +-- Platynaias          
                 +--+                       
                    +-- Prolasmidonta

Inoue et al., 2014 [Publ 3635], fig. 3A

iTtTbiriSoTroTroSiD
2 2 0 2 18 12 8 -- 
     +----------- Pseudodontoideus    
  +--+                                
  |  |  +-------- Lasmigona           
  |  +--+                             
  |     |  +----- Pterosyna           
  |     +--+                          
--+        |  +-- Arcidens_confragosus **
  |        +--+                       
  |           +-- Arcidens_wheeleri **   
  |                                   
  |     +-------- Strophitus          
  |     |                             
  +-----+     +-- Pyganodon           
        |  +--+                       
        |  |  +-- Utterbackia         
        +--+                          
           |  +-- Platynaias          
           +--+                       
              +-- Alasmidonta

Inoue et al., 2018 [Publ 3858], fig. 1_3a-c

iTtTbiriSoTroTroSiD
2 20 0 2 102 14 9 -- 
  +-- Alasmidonta_marginata      
  |                              
  +-- Prolasmidonta              
  |                              
  +-- Alasmidonta_undulata       
  |                              
  +-- Beringiana                 
  |                              
  +-- Anodonta_kennerlyi         
  |                              
  +-- Anodonta_nuttalliana       
  |                              
  +-- Anodonta_oregonensis       
  |                              
  +-- Arcidens_confragosus **       
  |                              
  +-- Arcidens_wheeleri **          
  |                              
  +-- Pterosyna                  
  |                              
--+-- Platynaias_compressa       
  |                              
  +-- Lasmigona                  
  |                              
  +-- Platynaias_decorata        
  |                              
  +-- Platynaias_subviridis      
  |                              
  +-- Pyganodon_grandis          
  |                              
  +-- Pyganodon_lacustris        
  |                              
  +-- Pseudodontoideus           
  |                              
  +-- Strophitus                 
  |                              
  +-- Utterbackia_imbecillis     
  |                              
  +-- Utterbackia_peninsularis__1
  |                              
  +-- Utterbackia_peninsularis__2

Inoue et al., 2020 [Publ 3941], fig. 4

iTtTbiriSoTroTroSiD
1 1 0 1 40 0 0 -- 
-- Arcidens_confragosus **

Hewitt et al., 2018 [Publ 3758], fig. 5

iTtTbiriSoTroTroSiD
1 1 0 1 8 5 5 -- 
  +-------- Pyganodon        
  |                          
  |     +-- Platynaias       
--+-----+                    
  |     +-- Strophitus       
  |                          
  |  +----- Lasmigona        
  +--+                       
     |  +-- Arcidens_wheeleri **
     +--+                    
        +-- Pterosyna

Pieri et al., 2018 [Publ 3867], fig. 3

iTtTbiriSoTroTroSiD
1 1 0 1 19 0 0 -- 
-- Arcidens_confragosus **

Inoue et al., 2020 [Publ 3941], fig. 3

iTtTbiriSoTroTroSiD
1 1 0 1 41 0 0 -- 
-- Arcidens_confragosus **

Boyer et al., 2011 [Publ 2718], fig. 4

iTtTbiriSoTroTroSiD
1 1 0 1 37 8 8 -- 
  +-------------- Strophitus          
  |                                   
  |        +----- Pterosyna           
--+  +-----+                          
  |  |     |  +-- Lasmigona           
  |  |     +--+                       
  +--+        +-- Arcidens_confragosus **
     |                                
     |  +-------- Utterbackia         
     |  |                             
     +--+-------- Alasmidonta         
        |                             
        |  +----- Pyganodon           
        +--+                          
           |  +-- Anodontoides        
           +--+                       
              +-- Platynaias