| Unionoida | Unionoidea | Unionidae | Ambleminae | Pleurobemini | Elliptoideus sloatianus nominal species Unio atromarginatus Lea, 1840
   Lea, 1840, Proc. Amer. Phil. Soc. 1: 288 [as ‘atro-marginatus’].
 Lea, 1842, Trans. Amer. Phil. Soc. 8 [O. 3]: 207 [45], pl. 13, fig. 21 [as ‘atro-marginatus’].
 = Elliptoideus sloatianus Taxonomic Opinions
	+ Elliptoideus sloatianus (Lea, 1840) — Williams et al., 2014+ Elliptoideus sloatianus (Lea, 1840) — Williams et al., 2011
 + Elliptoideus sloatianus (Lea, 1840) — Williams et al., 2008
 + Elliptoideus sloatianus (Lea, 1840) — Brim Box & Williams, 2000
 + Plectomerus dombeyanus (Valenciennes, 1827) — Howells et al., 1996
 + Plectomerus dombeyana (Valenciennes, 1827) — Oesch, 1984
 + Elliptoideus sloatianus (Lea, 1840) — Burch, 1975
 + Elliptio (Elliptoideus) sloatianus (Lea, 1840) — Haas, 1969
 + Elliptio sloatianus (Lea, 1840) — Clench & Turner, 1956
 + Elliptio (Elliptoideus) sloatianus (Lea, 1840) — Frierson, 1927
 + Unio (sec. Elliptio) sloatianus Lea, 1840 — Simpson, 1914
 - NO OPINION — de Gregorio, 1914
 + Unio (sec. Elliptio) sloatianus Lea, 1840 — Simpson, 1900
 + Unio trapezoides Lea — Call, 1895
 = Unio (sec. Metaptera) atromarginatus Lea, 1840 — Paetel, 1890
 = Unio atromarginatus Lea — B.H. Wright, 1888
 = Margaron (Unio) atromarginatus (Lea) — Lea, 1870
 = Unio atromarginatus Lea — Küster, 1861
 = Unio (Metaptera) atromarginatus Lea — Adams & Adams, 1857
 = Plectomerus atromarginatus (Lea) — Conrad, 1853
 = Complanaria atromarginatus  — Agassiz, 1852
 = Margaron (Unio) atromarginatus (Lea) — Lea, 1852
 
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