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Data last updated
Mon 1 Dec 2025
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Publication R.I. Johnson (1999): summarypublication summary
Full 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
‘Conrad’ R.I. Johnson, 1999. Occ. Pap. Moll. 6(77): 19. (error for Unio taumilapanus Conrad, 1855)
‘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. (error for Unio texasiensis Lea, 1857)
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
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