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 | 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! 
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 Publication R.I. Johnson (1999): summarypublication summary
 Complete CitationJohnson, R.I. 1999. Unionidae of the Rio Grande (Rio Bravo del Norte) system of Texas and Mexico. Occasional Papers on Mollusks 6(77): 1-65. Available electronically. Attributed Nominal Species| Unio bealii Singley, 1893‘Lea’ Singley, 1893. Geol. Surv. Texas (1892): 321.
 R.I. Johnson, 1999. Occ. Pap. Moll. 6(77): 35 [as ‘Unio beali’].
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 | Unio heermanii B.H. Wright, 1888‘Lea’  of Authors.
 B.H. Wright, 1888. Check List N. Amer. Unionidae etc.: [3].
 Singley, 1893. Geol. Surv. Texas (1892): 322.
 R.I. Johnson, 1998. Occ. Pap. Moll. 5(76): 448.
 R.I. Johnson, 1999. Occ. Pap. Moll. 6(77): 27.
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 | Unio taumilipanus R.I. Johnson, 1999‘Conrad’ R.I. Johnson, 1999. Occ. Pap. Moll. 6(77): 19.
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 | Unio texasensis Lea, 1860‘Lea’  of Authors.
 Lea, 1860. Jour. Acad. Nat. Sci. 4 [O. 8]: 359.
 Lea, 1870. Synopsis Fam. Naiades: 59.
 B.H. Wright, 1888. Check List N. Amer. Unionidae etc.: [5].
 Pilsbry & Rhoads, 1896. Proc. Acad. Nat. Sci. 48: 505.
 Simpson, 1900. Proc. U.S. Nat. Mus. 22: 563.
 Ortmann, 1915. Nautilus 28(12): 141.
 Utterback, 1916. Amer. Midl. Nat. 4(9): 398.
 Gordon et al., 1979. Bull. AMU (1979): 35, Table 3.
 Cummings & Mayer, 1992. Freshw. Mussels Midwest (5): 134.
 Vidrine, 1993. Histr. Distr. Freshw. Mussels LA: 169.
 R.I. Johnson, 1999. Occ. Pap. Moll. 6(77): 34.
 Bogan, 2010. FADA: [web].
 ITIS, 2012. ITIS: [web].
 Haag, 2012. N. Amer. Freshw. Mussels: 70 [as ‘Toxolasma texasensis’].
 McMurray et al., 2012. Mo. Freshw. Mussels: 57 [as ‘Toxolasma texasense’].
 Marshall et al., 2018. Amer. Malac. Bull. 36(1): 44.
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 Taxonomic OpinionsAnodonta (Pyganodon) grandis Say, 1829 = Pyganodon grandis+ Anodonta lugubris Say, 1829
 + Anodonta bealei Lea, 1863
 Anodonta (Utterbackia) imbecillis Say, 1829 = Utterbackia imbecillis Cyrtonaias tampicoensis (Lea, 1838) = Mesonaias tampicoensis+ Unio tecomatensis Lea, 1841
 + Unio grandensis Conrad, 1855
 + Unio berlandierii Lea, 1857
 + Unio saladoensis Lea, 1860
 + Unio heermannii Lea, 1861
 + Lampsilis (Cyrtonaias) tampicoensis kusteriana Frierson, 1927
 Cyrtonaias tampicoensis (Lea, 1838) = Cyrtonaias berlandierii Disconaias conchos Taylor, 1997 Lampsilis teres (Rafinesque, 1820)+ Unio anodontoides Lea, 1831
 Lampsilis teres fallaciosa (Smith, 1899) = Lampsilis teres Megalonaias nervosa (Rafinesque, 1820)+ Unio crassus var. giganteus Barnes, 1823
 + Unio eightsii Lea, 1860
 Popenaias popei (Lea, 1857) = Popenaias popeii Potamilus metnecktayi Johnson, 1998+ Lampsilis salinasensis Metcalf, 1982
 Potamilus purpuratus (Lamarck, 1819) Quadrula apiculata (Say, 1829) = Quadrula quadrula+ Unio speciosus Lea, 1862
 Quadrula couchiana (Lea, 1860) Quincuncina mitchelli (Simpson, 1896)+ Unio taumilapanus Conrad, 1855
 + Unio tamaulipasensis Fischer & Crosse, 1894
 + Unio iheringi B.H. Wright, 1898
 + Unio (sec. Elliptio) mitchelli var. elongatus Simpson, 1914
 + Quincuncina guadalupensis Wurtz, 1950
 Quincuncina mitchelli (Simpson, 1896) = Fusconaia mitchelli Quincuncina mitchelli (Simpson, 1896) = Fusconaia iheringi Toxolasma parvus (Barnes, 1823) = Toxolasma parvum+ Unio haleianus Lea, 1842
 + Unio texasiensis Lea, 1857
 + Unio bairdianus Lea, 1857
 + Unio bealei Lea, 1862
 + Lampsilis (Carunculina) texasensis var. compressus Simpson, 1900
 + Lampsilis mearnsi Simpson, 1900
 Toxolasma parvus (Barnes, 1823) = Toxolasma texasiense Toxolasma parvus (Barnes, 1823) = Leaunio lienosus Truncilla donaciformis (Lea)+ Unio zigzag Lea, 1829
 + Unio macrodon Lea, 1859
 + Unio cognatus Lea, 1860
 Truncilla donaciformis (Lea) = Truncilla cognata Truncilla donaciformis (Lea) = Truncilla macrodon Uniomerus tetralasmus (Say, 1831)+ Unio declivis Say, 1831
 + Unio manubius Gould, 1855
 Uniomerus tetralasmus (Say, 1831) = Uniomerus declivis |