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Page last updated
Thu 17 July 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!


Publication Simpson (1900): summary
     publication summary

Complete Citation

Simpson, C.T. 1900. New and unfigured Unionidae. Proceedings of the Academy of Natural Sciences of Philadelphia 52: 74-86. Available electronically.

Attributed Nominal Genera

Medionidus Simpson, 1900
Simpson, 1900. Proc. Acad. Nat. Sci. 52: 77.
Simpson, 1900. Proc. U.S. Nat. Mus. 22: 588.
Simpson, 1914. Descr. Cat. Naiades: 245.
Type species: Unio conradicus Lea, 1834 (orig. desig.) = Medionidus conradicus

Ptychobranchus Simpson, 1900
Simpson, 1900. Proc. Acad. Nat. Sci. 52: 79.
Simpson, 1900. Proc. U.S. Nat. Mus. 22: 612.
Simpson, 1914. Descr. Cat. Naiades: 332.
Type species: Unio phaseolus Hildreth, 1828 (orig. desig.) = Ptychobranchus fasciolaris

Attributed Nominal Species

There are 14 available nominal species attributed to this publication (17 total).
Click here for a complete list.

Taxonomic Opinions

Lampsilis australis Simpson = Hamiota australis

Lampsilis brittsi Simpson

Lampsilis fallaciosus (Smith) = Lampsilis teres

Lampsilis kirklandianus S.H. Wright = Hamiota subangulata

Lampsilis mearnsi Simpson = Toxolasma texasiense

Lampsilis villosus B.H. Wright = Villosa villosa

Medionidus walkeri B.H. Wright

Nephronaias reticulatus Simpson = Reticulatus reticulatus

Nodularia cylindracea [sic] Simpson = Lanceolaria cylindrica
+ Unio grayanus Schrenck, 1867

Obovaria rotulatus B.H. Wright = Reginaia rotulata

Obovaria tinkeri B.H. Wright = Obovaria unicolor

Pleurobema argenteus pannosa Simpson = Fusconaia ozarkensis

Pleurobema avellana Simpson = Pleurobema rubellum

Pleurobema brevis subelliptica Simpson = Fusconaia ozarkensis

Pleurobema harperi B.H. Wright = Pleurobema pyriforme

Pleurobema patsaligensis Simpson = Pleurobema strodeanum

Pleurobema pinkstoni S.H. Wright = Pleurobema perovatum

Pleurobema reclusa B.H. Wright = Pleurobema pyriforme

Pleurobema strodeana B.H. Wright = Pleurobema strodeanum

Pleurobema swordiana S.H. Wright = Pleurobema oviforme

Pseudodon loomisi Simpson = Obovalis omiensis

Ptychobranchus clintonensis Simpson = Ptychobranchus occidentalis

Quadrula flexuosa Simpson = Fusconaia subrotunda

Quadrula guatemalensis Simpson = Psoronaias guatemalensis

Quadrula rudis Simpson = Psoronaias semigranosa

Quadrula triumphans B.H. Wright = Megalonaias nervosa

Tritogonia conjugans B.H. Wright = Quadrula verrucosa

Unio brimleyi S.H. Wright = Fusconaia masoni

Unio burtchianus S.H. Wright = Elliptio occulta

Unio buxtoni B.H. Wright = Elliptio jayensis

Unio dispalans B.H. Wright = Elliptio occulta

Unio iheringi B.H. Wright = Fusconaia iheringi

Unio lehmani S.H. Wright = Elliptio occulta

Unio pinei B.H. Wright = Elliptio jayensis

 
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