Bivalvia | Unionida | Unionoidea | Unionidae | Ambleminae | Lampsilini

genus Medionidus Simpson, 1900: cladomics

6 Recent valid species (7 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 (7 total)
analyzed in 20 cladograms in 13 publications
maximum number of terminals in an analysis = 3 (mean = 1.3, median = 1)

Basic Monophyly

number of cladograms that test basic monophyly (i.e., more than 1 included species) = 5
maximum number of included terminals = 3, (mean = 2.2 median = 2)
proportion of cladograms that support basic monophyly = 0


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 Medionidus cladogram distances
PCoA Ordination

NJ Tree of Medionidus cladogram distances
NJ Tree


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 3 58 66 3 630 90 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 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

Campbell et al., 2005 [Publ 2660], fig. 1

cst iT tT bi riS oT roT roS iD
0.792 2 9 0 2 100 41 22 71.0
Cladomics cladogram Toxolasma Obliquaria Cyrtonaias Glebula Potamilus Medionidus acutissimus Lemiox Dromus Cyprogenia Sagittunio Medionidus conradicus Ptychobranchus Venustaconcha ellipsiformis 2 Ellipsaria Truncilla Villosa Obovaria olivaria Venustaconcha ellipsiformis 1 Epioblasma Obovaria unicolor Obovaria arkansasensis Obovaria subrotunda Hamiota Lampsilis cardium Lampsilis ovata Ortmanniana pectorosa Lampsilis ornata Ligumia Cambarunio Lampsilis teres Ortmanniana ligamentina Lampsilis siliquoidea Leaunio

Campbell et al., 2005 [Publ 2660], fig. 2

cst iT tT bi riS oT roT roS iD
0.750 2 6 0 2 100 41 22 65.0
Cladomics cladogram Obliquaria Cyrtonaias Glebula Sagittunio Leaunio Potamilus Hamiota Ellipsaria Truncilla Lampsilis teres Ortmanniana ligamentina Lampsilis siliquoidea Villosa Ligumia Cambarunio Ortmanniana pectorosa Lampsilis ornata Lampsilis cardium Lampsilis ovata Obovaria olivaria Venustaconcha ellipsiformis 2 Epioblasma Obovaria unicolor Obovaria arkansasensis Obovaria subrotunda Ptychobranchus Venustaconcha ellipsiformis 1 Medionidus conradicus Lemiox Medionidus acutissimus Dromus Cyprogenia

Zanatta & Murphy, 2006 [Publ 2672], fig. 1

cst iT tT bi riS oT roT roS iD
0.875 2 6 0 2 54 46 22 69.0
Cladomics cladogram Cyrtonaias Glebula Paetulunio Obliquaria Toxolasma Sagittunio Potamilus Medionidus conradicus Ptychobranchus Medionidus acutissimus Lemiox Dromus Cyprogenia Lampsilis teres Truncilla Ellipsaria Leaunio Hamiota Lampsilis fasciola Ortmanniana pectorosa Lampsilis ornata Lampsilis ovata Lampsilis cardium Venustaconcha Obovaria Epioblasma Lampsilis siliquoidea Ortmanniana ligamentina Cambarunio Ligumia

Zanatta & Murphy, 2006 [Publ 2672], fig. 2

cst iT tT bi riS oT roT roS iD
0.833 2 3 0 2 55 46 22 67.0
Cladomics cladogram Paetulunio Toxolasma Obliquaria Glebula Cyrtonaias Ptychobranchus Dromus Cyprogenia Medionidus conradicus Medionidus acutissimus Lemiox Sagittunio Potamilus Truncilla Ellipsaria Ortmanniana pectorosa Lampsilis fasciola Lampsilis ornata Lampsilis ovata Lampsilis cardium Ligumia Cambarunio Lampsilis teres Hamiota Leaunio Ortmanniana ligamentina Lampsilis siliquoidea Obovaria olivaria Venustaconcha Epioblasma Obovaria unicolor Obovaria subrotunda Obovaria arkansasensis

Smith et al., 2019 [Publ 3951], fig. 2

cst iT tT bi riS oT roT roS iD
0.905 1 1 0 1 40 35 19 --
Cladomics cladogram Obliquaria Medionidus conradicus Lemiox Cyprogenia Ptychobranchus Potamilus Atlanticoncha Ellipsaria Truncilla Hamiota Villosa Ligumia Venustaconcha Obovaria Epioblasma Ortmanniana pectorosa Ortmanniana ligamentina Lampsilis

Burlakova et al., 2019 [Publ 3899], fig. 1

cst iT tT bi riS oT roT roS iD
0.895 1 1 0 1 32 25 17 --
Cladomics cladogram Toxolasma Potamilus Ellipsaria Truncilla Medionidus acutissimus Lemiox Dromus Cambarunio Leaunio Villosa Sagittunio Lampsilis ovata Venustaconcha Epioblasma Obovaria Lampsilis teres Lampsilis siliquoidea Lampsilis hydiana Lampsilis straminea

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

cst iT tT bi riS oT roT roS iD
0.846 1 1 0 1 200 13 11 --
Cladomics cladogram Potamilus leptodon Potamilus alatus Venustaconcha Leaunio Ellipsaria Truncilla Medionidus conradicus Ptychobranchus Cambarunio Ortmanniana Lampsilis

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

cst iT tT bi riS oT roT roS iD
0.846 1 1 0 1 198 13 11 --
Cladomics cladogram Potamilus leptodon Potamilus alatus Medionidus conradicus Ptychobranchus Ellipsaria Truncilla Leaunio Venustaconcha Cambarunio Ortmanniana Lampsilis

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

cst iT tT bi riS oT roT roS iD
0.846 1 1 0 1 200 13 11 --
Cladomics cladogram Ellipsaria Potamilus leptodon Medionidus conradicus Potamilus alatus Ptychobranchus Truncilla Venustaconcha Cambarunio Leaunio Ortmanniana Lampsilis

Grobler et al., 2011 [Publ 3359], fig. 2

cst iT tT bi riS oT roT roS iD
0.909 1 1 0 1 16 15 9 --
Cladomics cladogram Lemiox Medionidus conradicus Dromus Cyprogenia Potamilus Lampsilis siliquoidea Lampsilis higginsii Ortmanniana Lampsilis fasciola Lampsilis cardium Lampsilis ovata Cambarunio Ligumia Epioblasma

Krebs et al., 2003 [Publ 2691], fig. 3

cst iT tT bi riS oT roT roS iD
0.667 1 1 0 1 32 10 7 --
Cladomics cladogram Ptychobranchus Potamilus fragilis Medionidus conradicus Villosa Ellipsaria Lampsilis teres Lampsilis siliquoidea Potamilus purpuratus Potamilus alatus

Lydeard et al., 1996 [Publ 2656], fig. 3

cst iT tT bi riS oT roT roS iD
0.750 1 1 0 1 26 8 6 --
Cladomics cladogram Potamilus fragilis Ptychobranchus Medionidus conradicus Potamilus purpuratus Lampsilis Ellipsaria Villosa

Lydeard et al., 1996 [Publ 2656], fig. 4

cst iT tT bi riS oT roT roS iD
0.875 1 1 0 1 27 8 6 --
Cladomics cladogram Obliquaria Medionidus conradicus Ptychobranchus Potamilus fragilis Potamilus purpuratus Ellipsaria Villosa Lampsilis

Huang et al., 2002 [Publ 2657], fig. 1

cst iT tT bi riS oT roT roS iD
0.750 1 1 0 1 33 7 6 --
Cladomics cladogram Medionidus conradicus Potamilus fragilis Ptychobranchus Potamilus purpuratus Lampsilis Villosa Ellipsaria

Huang et al., 2002 [Publ 2657], fig. 2

cst iT tT bi riS oT roT roS iD
0.750 1 1 0 1 33 7 6 --
Cladomics cladogram Potamilus fragilis Medionidus conradicus Amblema Obliquaria Plectomerus Villosa Ellipsaria Lampsilis Potamilus purpuratus Ptychobranchus

Serb et al., 2003 [Publ 2659], fig. 2

cst iT tT bi riS oT roT roS iD
0.857 1 1 0 1 28 6 5 --
Cladomics cladogram Medionidus conradicus Dromus Cyprogenia

Serb et al., 2003 [Publ 2659], fig. 3

cst iT tT bi riS oT roT roS iD
0.857 1 1 0 1 28 6 5 --
Cladomics cladogram Medionidus conradicus Dromus Cyprogenia

Roe, 2013 [Publ 3571], fig. 4

cst iT tT bi riS oT roT roS iD
1.000 1 1 0 1 10 10 5 --
Cladomics cladogram Obliquaria Lampsilis Medionidus conradicus Ptychobranchus Cyprogenia Dromus

Turner et al., 2000 [Publ 2722], fig. 2

cst iT tT bi riS oT roT roS iD
0.750 1 1 0 1 13 8 2 --
Cladomics cladogram Medionidus conradicus Lampsilis teres Villosa Lampsilis satura Lampsilis cardium Lampsilis reeveiana Lampsilis hydiana 1 Lampsilis hydiana 2 Lampsilis siliquoidea 2 Lampsilis siliquoidea 1 Lampsilis powellii