Bivalvia | Unionida | Unionoidea | Unionidae | Ambleminae | Lampsilini

genus Pachynaias Crosse & Fischer, 1894: cladomics

1 Recent valid species (1 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 = 1 (1 total)
analyzed in 11 cladograms in 8 publications
maximum number of terminals in an analysis = 1 (mean = 1, median = 1)


Cladograms

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

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

cst iT tT bi riS oT roT roS iD
0.607 1 1 0 1 632 92 26 **
Cladomics cladogram Potamilus inflatus Potamilus ohiensis Potamilus amphichaenus Potamilus streckersoni Potamilus fragilis 2 Potamilus leptodon Potamilus fragilis 1 Potamilus metnecktayi Potamilus alatus 3 Potamilus alatus 2 Potamilus purpuratus 2 Potamilus alatus 1 Potamilus purpuratus 1 Villosa villosa Atlanticoncha Cambarunio nebulosus Ligumia Leaunio umbrans Cambarunio taeniatus Cambarunio iris Cambarunio simus Hamiota Pachynaias spheniopsis Sagittunio Ellipsaria Potamilus capax Truncilla Medionidus acutissimus Lemiox Medionidus penicillatus Ptychobranchus Cyprogenia aberti 2 Dromus Cyprogenia stegaria 2 Cyprogenia aberti 1 Cyprogenia stegaria 1 Villosa delumbis Villosa vibex Obovaria olivaria Venustaconcha Epioblasma Obovaria retusa Obovaria choctawensis Obovaria unicolor Obovaria subrotunda Mesonaias Obovaria arkansasensis Lampsilis splendida Lampsilis bracteata Lampsilis fasciola Ortmanniana pectorosa Lampsilis ornata Lampsilis ovata 2 Lampsilis dolabraeformis Lampsilis cardium 2 Lampsilis cardium 1 Lampsilis satura Lampsilis cariosa 2 Lampsilis ovata 1 Lampsilis cariosa 1 Ortmanniana ligamentina 2 Lampsilis abrupta Lampsilis higginsii 2 Ortmanniana ligamentina 1 Lampsilis higginsii 1 Medionidus conradicus Leaunio lienosus Leaunio vanuxemensis Lampsilis floridensis Lampsilis teres Lampsilis siliquoidea 1 Lampsilis siliquoidea 2 Lampsilis powellii 1 Lampsilis powellii 2 Lampsilis sietmani Lampsilis straminea 2 Lampsilis virescens Lampsilis hydiana 2 Lampsilis hydiana 1 Lampsilis bergmanni Lampsilis straminea 1

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

cst iT tT bi riS oT roT roS iD
1.000 1 1 0 1 30 11 11 0.0
Cladomics cladogram Cyrtonaias Glebula Potamilus Truncilla Ptychobranchus Pachynaias spheniopsis Mesonaias Lampsilis Ortmanniana Cambarunio Epioblasma Ligumia

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

cst iT tT bi riS oT roT roS iD
1.000 1 1 0 1 22 11 11 0.0
Cladomics cladogram Glebula Cyrtonaias Potamilus Ptychobranchus Truncilla Ortmanniana Epioblasma Lampsilis Ligumia Cambarunio Pachynaias spheniopsis Mesonaias

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

cst iT tT bi riS oT roT roS iD
1.000 1 1 0 1 21 10 10 0.0
Cladomics cladogram Cyrtonaias Ptychobranchus Ligumia Potamilus Pachynaias spheniopsis Epioblasma Truncilla Mesonaias Cambarunio Ortmanniana Lampsilis

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

cst iT tT bi riS oT roT roS iD
1.000 1 1 0 1 27 19 7 0.0
Cladomics cladogram Obliquaria Cyrtonaias Pachynaias spheniopsis Lampsilis Ellipsaria Truncilla Atlanticoncha Potamilus

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

cst iT tT bi riS oT roT roS iD
1.000 1 1 0 1 27 19 7 0.0
Cladomics cladogram Obliquaria Cyrtonaias Pachynaias spheniopsis Lampsilis Ellipsaria Truncilla Atlanticoncha Potamilus

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 4 4 0.0
Cladomics cladogram Obliquaria Cyrtonaias Leaunio Lampsilis Pachynaias spheniopsis

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

cst iT tT bi riS oT roT roS iD
1.000 1 1 0 1 56 4 4 0.0
Cladomics cladogram Obliquaria Cyrtonaias Leaunio Lampsilis Pachynaias spheniopsis

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

cst iT tT bi riS oT roT roS iD
1.000 1 1 0 1 15 2 2 0.0
Cladomics cladogram Cyrtonaias Mesonaias Pachynaias spheniopsis

Barraza et al., 2026 [Publ 4851], fig. 3

cst iT tT bi riS oT roT roS iD
0.750 1 1 0 1 18 2 2 0.0
Cladomics cladogram Mesonaias Pachynaias spheniopsis

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

cst iT tT bi riS oT roT roS iD
1.000 1 1 0 1 5 1 1 0.0
Cladomics cladogram Mesonaias Pachynaias spheniopsis