Bivalvia | Unionida | Unionoidea | Unionidae | Parreysiinae | Lamellidentini

genus Trapezidens Bolotov, Vikhrev & Konopleva in Bolotov et al., 2017: cladomics

6 Recent valid species (6 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 = 6 (6 total)
analyzed in 43 cladograms in 25 publications
maximum number of terminals in an analysis = 6 (mean = 3.05, median = 2)

Basic Monophyly

number of cladograms that test basic monophyly (i.e., more than 1 included species) = 26
maximum number of included terminals = 6, (mean = 4.38 median = 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 of Trapezidens cladogram distances
PCoA Ordination

NJ Tree of Trapezidens cladogram distances
NJ Tree

Cladograms

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

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

cst iT tT bi riS oT roT roS iD
1.000 6 6 4 6 56 11 2 **
Cladomics cladogram Lamellidens Balwantia Trapezidens mogaungensis Trapezidens exolescens Trapezidens scutum Trapezidens yeti Trapezidens angustior Trapezidens dolichorhynchus

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

cst iT tT bi riS oT roT roS iD
1.000 6 6 4 6 57 11 2 0.0
Cladomics cladogram Lamellidens Balwantia Trapezidens mogaungensis Trapezidens exolescens Trapezidens scutum Trapezidens yeti Trapezidens dolichorhynchus Trapezidens angustior

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

cst iT tT bi riS oT roT roS iD
0.750 6 6 4 6 627 11 2 0
Cladomics cladogram Balwantia Trapezidens mogaungensis Trapezidens exolescens Trapezidens scutum Trapezidens yeti Trapezidens angustior Trapezidens dolichorhynchus

Konopleva et al., 2026 [Publ 4847], fig. 2

cst iT tT bi riS oT roT roS iD
1.000 6 6 4 6 60 12 2 2.0
Cladomics cladogram Lamellidens Balwantia Trapezidens mogaungensis Trapezidens exolescens Trapezidens scutum Trapezidens yeti Trapezidens angustior Trapezidens dolichorhynchus

Konopleva et al., 2026 [Publ 4847], fig. S1

cst iT tT bi riS oT roT roS iD
1.000 6 6 3 6 60 12 2 1.0
Cladomics cladogram Lamellidens Balwantia Trapezidens mogaungensis Trapezidens exolescens Trapezidens scutum Trapezidens angustior Trapezidens dolichorhynchus Trapezidens yeti

Konopleva et al., 2026 [Publ 4847], fig. S2

cst iT tT bi riS oT roT roS iD
1.000 6 6 4 6 61 12 2 0
Cladomics cladogram Lamellidens Balwantia Trapezidens mogaungensis Trapezidens exolescens Trapezidens scutum Trapezidens yeti Trapezidens angustior Trapezidens dolichorhynchus

Konopleva et al., 2026 [Publ 4847], fig. S3

cst iT tT bi riS oT roT roS iD
1.000 6 6 4 6 61 12 2 0
Cladomics cladogram Lamellidens Balwantia Trapezidens mogaungensis Trapezidens exolescens Trapezidens scutum Trapezidens yeti Trapezidens angustior Trapezidens dolichorhynchus

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

cst iT tT bi riS oT roT roS iD
1.000 6 6 3 6 55 10 1 1.0
Cladomics cladogram Lamellidens Trapezidens mogaungensis Trapezidens exolescens Trapezidens scutum Trapezidens angustior Trapezidens dolichorhynchus Trapezidens yeti

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

cst iT tT bi riS oT roT roS iD
1.000 6 6 4 6 55 10 1 2.0
Cladomics cladogram Lamellidens Trapezidens mogaungensis Trapezidens scutum Trapezidens exolescens Trapezidens yeti Trapezidens dolichorhynchus Trapezidens angustior

Konopleva et al., 2020 [Publ 4072], fig. 2

cst iT tT bi riS oT roT roS iD
1.000 5 5 3 5 7 4 1 3.0
Cladomics cladogram Lamellidens Trapezidens scutum Trapezidens exolescens Trapezidens yeti Trapezidens angustior Trapezidens dolichorhynchus

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

cst iT tT bi riS oT roT roS iD
1.000 5 5 3 5 53 9 1 5.0
Cladomics cladogram Lamellidens Trapezidens exolescens Trapezidens scutum Trapezidens angustior Trapezidens dolichorhynchus Trapezidens yeti

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

cst iT tT bi riS oT roT roS iD
1.000 5 5 2 5 53 9 1 2.0
Cladomics cladogram Lamellidens Trapezidens exolescens Trapezidens scutum Trapezidens angustior Trapezidens dolichorhynchus Trapezidens yeti

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

cst iT tT bi riS oT roT roS iD
1.000 5 5 3 5 53 9 1 3.0
Cladomics cladogram Lamellidens Trapezidens scutum Trapezidens exolescens Trapezidens yeti Trapezidens dolichorhynchus Trapezidens angustior

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

cst iT tT bi riS oT roT roS iD
1.000 5 5 3 5 44 4 1 1.0
Cladomics cladogram Lamellidens Trapezidens exolescens Trapezidens scutum Trapezidens yeti Trapezidens angustior Trapezidens dolichorhynchus

Bolotov et al., 2022 [Publ 4250], fig. S4

cst iT tT bi riS oT roT roS iD
1.000 5 5 2 5 4 4 1 4.0
Cladomics cladogram Lamellidens Trapezidens scutum Trapezidens exolescens Trapezidens dolichorhynchus Trapezidens angustior Trapezidens yeti

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

cst iT tT bi riS oT roT roS iD
1.000 4 4 2 4 113 4 1 2.0
Cladomics cladogram Lamellidens Trapezidens exolescens Trapezidens scutum Trapezidens dolichorhynchus Trapezidens angustior

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

cst iT tT bi riS oT roT roS iD
1.000 4 4 2 4 107 4 1 2.0
Cladomics cladogram Lamellidens Trapezidens exolescens Trapezidens scutum Trapezidens dolichorhynchus Trapezidens angustior

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

cst iT tT bi riS oT roT roS iD
0.333 3 3 1 3 122 8 1 3.0
Cladomics cladogram Lamellidens Trapezidens exolescens Trapezidens dolichorhynchus Trapezidens angustior

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

cst iT tT bi riS oT roT roS iD
1.000 3 3 1 3 198 8 1 3.0
Cladomics cladogram Lamellidens Trapezidens exolescens Trapezidens dolichorhynchus Trapezidens angustior

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

cst iT tT bi riS oT roT roS iD
1.000 3 3 1 3 196 8 1 3.0
Cladomics cladogram Lamellidens Trapezidens exolescens Trapezidens angustior Trapezidens dolichorhynchus

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

cst iT tT bi riS oT roT roS iD
1.000 3 3 1 3 198 8 1 3.0
Cladomics cladogram Lamellidens Trapezidens exolescens Trapezidens angustior Trapezidens dolichorhynchus

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

cst iT tT bi riS oT roT roS iD
1.000 2 2 0 2 137 6 1 --
Cladomics cladogram Lamellidens Trapezidens dolichorhynchus Trapezidens exolescens

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

cst iT tT bi riS oT roT roS iD
1.000 2 2 0 2 137 6 1 --
Cladomics cladogram Lamellidens Trapezidens dolichorhynchus Trapezidens exolescens

Konopleva et al., 2017 [Publ 3807], fig. 5

cst iT tT bi riS oT roT roS iD
1.000 2 2 0 2 3 3 1 --
Cladomics cladogram Lamellidens Trapezidens exolescens Trapezidens dolichorhynchus

Konopleva et al., 2017 [Publ 3807], fig. 6

cst iT tT bi riS oT roT roS iD
1.000 2 2 0 2 29 3 1 --
Cladomics cladogram Lamellidens Trapezidens exolescens Trapezidens dolichorhynchus

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

cst iT tT bi riS oT roT roS iD
1.000 2 2 0 2 80 4 1 --
Cladomics cladogram Lamellidens Trapezidens exolescens Trapezidens dolichorhynchus

Whelan et al., 2011 [Publ 3380], fig. 1-ML

cst iT tT bi riS oT roT roS iD
1.000 1 1 0 1 35 1 1 --
Cladomics cladogram Lamellidens Trapezidens dolichorhynchus

Whelan et al., 2011 [Publ 3380], fig. 1-MP

cst iT tT bi riS oT roT roS iD
1.000 1 1 0 1 35 1 1 --
Cladomics cladogram Lamellidens Trapezidens dolichorhynchus

Pfeiffer & Graf, 2015 [Publ 3620], fig. 2

cst iT tT bi riS oT roT roS iD
1.000 1 1 0 1 39 1 1 --
Cladomics cladogram Trapezidens dolichorhynchus Lamellidens

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

cst iT tT bi riS oT roT roS iD
1.000 1 1 0 1 27 1 1 --
Cladomics cladogram Trapezidens dolichorhynchus Lamellidens

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

cst iT tT bi riS oT roT roS iD
1.000 1 1 0 1 22 1 1 --
Cladomics cladogram Lamellidens Trapezidens exolescens

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

cst iT tT bi riS oT roT roS iD
1.000 1 1 0 1 56 1 1 --
Cladomics cladogram Trapezidens dolichorhynchus Lamellidens

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

cst iT tT bi riS oT roT roS iD
1.000 1 1 0 1 56 1 1 --
Cladomics cladogram Trapezidens dolichorhynchus Lamellidens

Wu et al., 2021 [Publ 4366], fig. 2_I

cst iT tT bi riS oT roT roS iD
1.000 1 1 0 1 90 3 1 --
Cladomics cladogram Trapezidens exolescens Lamellidens

Wu et al., 2021 [Publ 4366], fig. 6

cst iT tT bi riS oT roT roS iD
1.000 1 1 0 1 90 3 1 --
Cladomics cladogram Trapezidens exolescens Lamellidens

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

cst iT tT bi riS oT roT roS iD
1.000 1 1 0 1 55 1 1 --
Cladomics cladogram Trapezidens exolescens Lamellidens

Chen et al., 2026 [Publ 4833], fig. 1

cst iT tT bi riS oT roT roS iD
0.667 1 1 0 1 26 1 1 --
Cladomics cladogram Trapezidens dolichorhynchus Parreysia Leoparreysia Nitia Coelatura Prisodontopsis Indochinella Indonaia Radiatula Songkhlanaia Harmandia Chenunionetta Unionetta fabagina 2 Unionetta fabagina 1 Scabies

Lopes-Lima et al., 2017 [Publ 3745], fig. 1-2

cst iT tT bi riS oT roT roS iD
1.000 1 1 0 1 80 0 0 --
Cladomics cladogram Trapezidens dolichorhynchus Leoparreysia Coelatura Indochinella

Dai et al., 2024 [Publ 4385], fig. 3-BI

cst iT tT bi riS oT roT roS iD
1.000 1 1 0 1 30 0 0 --
Cladomics cladogram Trapezidens exolescens Scabies

Dai et al., 2024 [Publ 4385], fig. 3-ML

cst iT tT bi riS oT roT roS iD
1.000 1 1 0 1 30 0 0 --
Cladomics cladogram Trapezidens exolescens Scabies

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

cst iT tT bi riS oT roT roS iD
1.000 1 1 0 1 21 0 0 --
Cladomics cladogram Trapezidens exolescens Scabies

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

cst iT tT bi riS oT roT roS iD
1.000 1 1 0 1 21 0 0 --
Cladomics cladogram Trapezidens exolescens Scabies

Dai et al., 2026 [Publ 4757], fig. 3

cst iT tT bi riS oT roT roS iD
1.000 1 1 0 1 33 0 0 --
Cladomics cladogram Scabies Trapezidens exolescens