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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Unionoida | 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

Page updated: 08:22:27 Tue 01 Jul 2025