Haas, F. 1919. Die Unioniden. [in] H.C. Küster, Systematisches Conchylien-Cabinet von Martini und Chemnitz 9 (pt. 2, h. 51): 257-288, pls. 60-63. Available electronically.
Haas, 1912. Conch. Cab. 9 (pt. 2, h. 46): pl. 32.
Haas, 1913. Nachr. Bl. Dtsch. Malak. Ges. 45: 37.
Haas, 1919. Conch. Cab. 9 (pt. 2, h. 51): 257.
Type species: Unio messageri Bavay & Dautzenberg, 1901 (orig. desig.) = Protunio messageri
Haas, 1919. Conch. Cab. 9 (pt. 2, h. 51): 276. [nomen nudum]
Haas, 1920. Conch. Cab. 9 (pt. 2, h. 52): 292.
(intro'd as sub-gen. of Physunio Simpson, 1900)
Type species: Unio velaris ‘Benson, in Hanley’ Sowerby, 1868 (monotypy) = Lamellidens friersoni

Frierson, 1913. Nautilus 26: 142.
‘Gould’ Haas, 1919. Conch. Cab. 9 (pt. 2, h. 51): pl. 32, figs. 3-4.
Type(s): LECTOTYPE SMF_13699B, Lashio Fl. Lashio nordl Shan Staaten.
‘Gould’ Haas, 1919. Conch. Cab. 9 (pt. 2, h. 51): pl. 32, figs. 3-4.
(misidentified reference to Unio foliaceus Gould, 1843)
‘Preston’ Haas, 1919. Conch. Cab. 9 (pt. 2, h. 51): 267.
‘Preston’ Haas, 1969. Das Tierreich 88: 76.
(error for Trapezoideus foliaceus var. zayleymanensis Preston, 1912)
Harmandia castelneaui Rochebrune, 1904 = Triplodon corrugatus
Harmandia somboriensis Rochebrune, 1882
Physunio (s.s.) cambodiensis (Lea, 1856) = Lens contradens
Physunio (s.s.) eximius (Lea, 1856) = Lens eximius+ Unio semiquadrata Sowerby, 1866
Physunio (s.s.) gravidus (Lea, 1856) = Physunio superbus+ Unio abnormis Morelet, 1862
+ Unio superbus Sowerby, 1867
Physunio (s.s.) inornatus (Lea, 1856) = Lens inornatus
Physunio (s.s.) micropterus (Morelet, 1866) = Lens micropterus
Physunio (s.s.) semialatus (DeShayes & Jullien, 1874) = Lens micropterus+ Unio micropterus ‘Morelet’ of Authors
Protunio messageri (Bavay & Dautzenberg, 1901)
Trapezoideus dallianus (Frierson, 1913) = Yaukthwa dalliana+ Unio foliaceus Martens, 1899
Trapezoideus foliaceus (Gould, 1843) = Trapezoideus foliaceus + Yaukthwa peguensis+ Unio peguensis Anthony, 1865
Trapezoideus ludovicianus (Rochebrune, 1882) = Lens micropterus
Trapezoideus misellus (Morelet, 1865) = Lens misellus + Lens pallegoixi + Lens comptus + Trapezidens exolescens + Yaukthwa zayleymanensis+ Unio siamensis Lea, 1866
+ Anodon pallegoixi Sowerby, 1867
+ Unio comptus Deshayes in Deshayes & Jullien, 1876
+ Unio fragilis Nevill, 1877
+ Unio exolescens Hanley & Theobald, 1874
+ Trapezoideus foliaceus var. zayleymanensis Preston, 1912
Trapezoideus subclathratus (von Martens, 1899) = Indonaia subclathrata