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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Bivalvia | ... | Hyrioidea | Hyriidae | Hyriinae | Rhipidodontini | Diplodon rotundus nominal species Unio quadrans Lea, 1860  Lea, 1860. Proc. Acad. Nat. Sci. 12: 306.
Lea, 1860. Jour. Acad. Nat. Sci. 4 [O. 8]: 360 [42], pl. 61, fig. 185.
Type(s): HOLOTYPE ANSP_125601, Texas.
= Diplodon rotundus Taxonomic Opinions+ Diplodon fontainianus (Orbigny, 1835) — Simone, 2006 + Diplodon (Rhipidodonta) fontainianus (d’Orbigny, 1835) — Haas, 1969 + Diplodon rotundus rotundus (Wagner, 1827) — Parodiz, 1968 + Diplodon (Cyclomya) fontainianus (d’Orbigny, 1835) — Haas, 1931 + Diplodon (Cyclomya) fontainianus (Orb.) — Haas, 1930 = Diplodon (s.s.) quadrans (Lea, 1860) — Simpson, 1914 = Diplodon (s.s.) quadrans (Lea, 1860) — Simpson, 1900 = Unio quadrans Lea — Singley, 1893 = Unio quadraus [sic] Lea — B.H. Wright, 1888 = Margaron (Unio) quadrans (Lea) — Lea, 1870
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