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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!

Search the database pages:

Bivalvia | Unionida | Unionoidea | Unionidae | Parreysiinae | Parreysiini

genus Parreysia Conrad, 1853: cladomics
     8 Recent valid species (8 total species)

Cladomics Summary

number of species = 8 (8 total)
analyzed in 32 cladograms in 19 publications
maximum number of terminals in an analysis = 6 (mean = 2.91, median = 3)

Basic Monophyly

number of cladograms that test basic monophyly (i.e., more than 1 included species) = 20
maximum number of included terminals = 6, (mean = 4.05 median = 4.5)
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

Bolotov et al., 2024 [Publ 4369], fig. 2

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

iTtTbiriSoTroTroSiD
664656110
  +-------------- Assamnaia             
  |                                     
--+           +-- Parreysia_keralaensis ** 
  |  +--------+                         
  |  |        +-- Parreysia_marcens **     
  +--+                                  
     |  +-------- Parreysia_rakhinensis ** 
     +--+                               
        |  +----- Parreysia_corrugata **   
        +--+                            
           |  +-- Parreysia_plagiosoma **  
           +--+                         
              +-- Parreysia_nagpoorensis **

Bolotov et al., 2024 [Publ 4369], fig. S1

iTtTbiriSoTroTroSiD
664657114
           +-- Parreysia_keralaensis ** 
  +--------+                         
  |        +-- Parreysia_marcens **     
--+                                  
  |  +-------- Parreysia_corrugata **   
  +--+                               
     |  +----- Parreysia_nagpoorensis **
     +--+                            
        |  +-- Parreysia_plagiosoma **  
        +--+                         
           +-- Parreysia_rakhinensis **

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

iTtTbiriSoTroTroSiD
6646625114
  +-------------- Assamnaia             
  |                                     
--+           +-- Parreysia_keralaensis ** 
  |  +--------+                         
  |  |        +-- Parreysia_marcens **     
  +--+                                  
     |  +-------- Parreysia_plagiosoma **  
     +--+                               
        |  +----- Parreysia_rakhinensis ** 
        +--+                            
           |  +-- Parreysia_corrugata **   
           +--+                         
              +-- Parreysia_nagpoorensis **

Bolotov et al., 2022 [Publ 4252], fig. 2

iTtTbiriSoTroTroSiD
553556003
  +----------- Parreysia_keralaensis ** 
--+                                  
  |  +-------- Parreysia_corrugata **   
  +--+                               
     |  +----- Parreysia_rakhinensis ** 
     +--+                            
        |  +-- Parreysia_nagpoorensis **
        +--+                         
           +-- Parreysia_plagiosoma **

Bolotov et al., 2022 [Publ 4239], fig. 2

iTtTbiriSoTroTroSiD
553553005
  +----------- Parreysia_keralaensis ** 
--+                                  
  |  +-------- Parreysia_plagiosoma **  
  +--+                               
     |  +----- Parreysia_nagpoorensis **
     +--+                            
        |  +-- Parreysia_corrugata **   
        +--+                         
           +-- Parreysia_rakhinensis **

Bolotov et al., 2020 [Publ 4100], fig. 1

iTtTbiriSoTroTroSiD
5535112005
  +----------- Parreysia_keralaensis ** 
--+                                  
  |  +-------- Parreysia_plagiosoma **  
  +--+                               
     |  +----- Parreysia_corrugata **   
     +--+                            
        |  +-- Parreysia_nagpoorensis **
        +--+                         
           +-- Parreysia_rakhinensis **

Bolotov et al., 2022 [Publ 4252], fig. S1

iTtTbiriSoTroTroSiD
550556004
  +-- Parreysia_keralaensis ** 
  |                         
  +-- Parreysia_corrugata **   
  |                         
--+-- Parreysia_plagiosoma **  
  |                         
  +-- Parreysia_rakhinensis ** 
  |                         
  +-- Parreysia_nagpoorensis **

Bolotov et al., 2022 [Publ 4239], fig. S1

iTtTbiriSoTroTroSiD
553553003
  +----------- Parreysia_keralaensis ** 
--+                                  
  |  +-------- Parreysia_corrugata **   
  +--+                               
     |  +----- Parreysia_rakhinensis ** 
     +--+                            
        |  +-- Parreysia_plagiosoma **  
        +--+                         
           +-- Parreysia_nagpoorensis **

Bolotov et al., 2020 [Publ 4100], fig. S1

iTtTbiriSoTroTroSiD
5535106005
  +----------- Parreysia_keralaensis ** 
--+                                  
  |  +-------- Parreysia_corrugata **   
  +--+                               
     |  +----- Parreysia_nagpoorensis **
     +--+                            
        |  +-- Parreysia_rakhinensis ** 
        +--+                         
           +-- Parreysia_plagiosoma **

Bolotov et al., 2022 [Publ 4239], fig. S2

iTtTbiriSoTroTroSiD
553553005
  +----------- Parreysia_keralaensis ** 
--+                                  
  |  +-------- Parreysia_corrugata **   
  +--+                               
     |  +----- Parreysia_nagpoorensis **
     +--+                            
        |  +-- Parreysia_plagiosoma **  
        +--+                         
           +-- Parreysia_rakhinensis **

Bolotov et al., 2017 [Publ 3764], fig. S1

iTtTbiriSoTroTroSiD
4424120004
  +-------- Parreysia_keralaensis ** 
--+                               
  |  +----- Parreysia_plagiosoma **  
  +--+                            
     |  +-- Parreysia_corrugata **   
     +--+                         
        +-- Parreysia_nagpoorensis **

Huang et al., 2019 [Publ 3843], fig. S4

iTtTbiriSoTroTroSiD
3303197004
  +-- Parreysia_keralaensis ** 
  |                         
--+-- Parreysia_nagpoorensis **
  |                         
  +-- Parreysia_plagiosoma **

Pfeiffer et al., 2018 [Publ 3827], fig. 2

iTtTbiriSoTroTroSiD
331325003
  +----- Parreysia_keralaensis ** 
--+                            
  |  +-- Parreysia_nagpoorensis **
  +--+                         
     +-- Parreysia_plagiosoma **

Huang et al., 2019 [Publ 3843], fig. S3

iTtTbiriSoTroTroSiD
3313195003
  +----- Parreysia_keralaensis ** 
--+                            
  |  +-- Parreysia_nagpoorensis **
  +--+                         
     +-- Parreysia_plagiosoma **

Bolotov et al., 2017 [Publ 3761], fig. S1

iTtTbiriSoTroTroSiD
3303135004
  +-- Parreysia_nagpoorensis **
  |                         
--+-- Parreysia_plagiosoma **  
  |                         
  +-- Parreysia_corrugata **

Huang et al., 2019 [Publ 3843], fig. 2

iTtTbiriSoTroTroSiD
3313197003
  +----- Parreysia_keralaensis ** 
--+                            
  |  +-- Parreysia_nagpoorensis **
  +--+                         
     +-- Parreysia_plagiosoma **

Bolotov et al., 2017 [Publ 3761], fig. S2

iTtTbiriSoTroTroSiD
3303135004
  +-- Parreysia_nagpoorensis **
  |                         
--+-- Parreysia_plagiosoma **  
  |                         
  +-- Parreysia_corrugata **

Bolotov et al., 2018 [Publ 3826], fig. 2

iTtTbiriSoTroTroSiD
22028000--
  +-- Parreysia_keralaensis ** 
--+                         
  +-- Parreysia_nagpoorensis **

Lyubas et al., 2022 [Publ 4255], fig. 7

iTtTbiriSoTroTroSiD
22022900--
  +-- Parreysia_corrugata **  
--+                        
  +-- Parreysia_keralaensis **

Lyubas et al., 2022 [Publ 4255], fig. S1

iTtTbiriSoTroTroSiD
22022900--
  +-- Parreysia_corrugata **  
--+                        
  +-- Parreysia_keralaensis **

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

iTtTbiriSoTroTroSiD
11014000--
-- Parreysia_nagpoorensis **

Chen et al., 2025 [Publ 4487], fig. 2

iTtTbiriSoTroTroSiD
11014000--
-- Parreysia_nagpoorensis **

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

iTtTbiriSoTroTroSiD
11014000--
-- Parreysia_nagpoorensis **

Graf, 2000 [Publ 2647], fig. 1

iTtTbiriSoTroTroSiD
11011600--
-- Parreysia **

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

iTtTbiriSoTroTroSiD
11015500--
-- Parreysia_rakhinensis **

Imsong & Murali, 2023 [Publ 4370], fig. 2

iTtTbiriSoTroTroSiD
1101200--
-- Parreysia_marcens **

Bolotov et al., 2022 [Publ 4250], fig. 8

iTtTbiriSoTroTroSiD
11014800--
-- Parreysia_rakhinensis **

Bolotov et al., 2022 [Publ 4250], fig. S2

iTtTbiriSoTroTroSiD
11011400--
-- Parreysia_rakhinensis **

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

iTtTbiriSoTroTroSiD
11014400--
-- Parreysia_nagpoorensis **

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

iTtTbiriSoTroTroSiD
11014400--
-- Parreysia_nagpoorensis **

Chen et al., 2025 [Publ 4487], fig. 3

iTtTbiriSoTroTroSiD
11014000--
-- Parreysia_nagpoorensis **

Jeratthitikul et al., 2019 [Publ 3922], fig. 1

iTtTbiriSoTroTroSiD
11012200--
-- Parreysia_keralaensis **
 
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