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Bivalvia
| ... | Unionoidea
| Unionidae
| Ambleminae
| Lampsilini
| Medionidus simpsonianus
nominal species Medionidus simpsonianus Walker, 1905
Walker, 1905. Nautilus 18(12): 136, pl. 9, figs. 4-5. Type(s): HOLOTYPE UMMZ_98510, Calvary, Grady, Co., Georgia.
= Medionidus simpsonianus Taxonomic Opinions= Medionidus simpsonianus Walker, 1905 — FMCS, 2025 = Medionidus simpsonianus (Walker, 1905) — Hopper et al., 2023 = Medionidus simpsonianus Walker, 1905 — Graf & Cummings, 2021 = Medionidus simpsonianus Walker, 1905 — FMCS, 2021 = Medionidus simpsonianus Walker, 1905 — Williams et al., 2017 = Medionidus simpsonianus Walker, 1905 — Williams et al., 2014 = Medionidus simpsonianus Walker, 1905 — ITIS, 2012 = Medionidus simpsonianus — Haag, 2012 = Medionidus simpsonianus Walker, 1905 — Williams et al., 2011 = Medionidus simpsonianus Walker, 1905 — Bogan, 2010 = Medionidus simpsonianus — Cummings & Graf, 2010 = Medionidus simpsonianus — Anonymous, 2008 = Medionidus simpsonianus B. Walker, 1905 — Graf & Cummings, 2007 = Medionidus simpsonianus Walker, 1905 — IUCN, 2000 = Medionidus simpsonianus Walker, 1905 — Turgeon et al., 1998 = Medionidus simpsonianus Walker — Williams et al., 1993 = Medionidus simpsonianus Walker, 1905 — Turgeon et al., 1988 = Medionidus simpsonianus Walker, 1905 — R.I. Johnson, 1977 + Medionidus penicillatus (Lea, 1857) — Burch, 1975 = Medionidus simpsonianus Walker, 1905 — Haas, 1969 + Medionidus penicillatus (Lea, 1857) — Clench & Turner, 1956 = Medionidus simpsonianus Walker, 1905 — Frierson, 1927 = Medionidus simpsonianus Walker, 1905 — Simpson, 1914
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