species Elliptoideus sloatianus (Lea, 1840): synonymy

Unio sloatianus Lea, 1840

Lea, 1840. Proc. Amer. Phil. Soc. 1: 287.
Lea, 1842. Trans. Amer. Phil. Soc. 8 [O. 3]: 217 [55], pl. 16, fig. 33.
HOLOTYPE (MONOTYPY) AMNH_56104, Chattahoochee River, Georgia.

Unio (sec. Elliptio) sloatianus — Simpson (1900)
Unio (sec. Elliptio) (Group of U. sloatianus) sloatianus — Simpson (1914)
Elliptio (Elliptoideus) sloatianus — Frierson (1927), Haas (1969)
Elliptio sloatianus — Thiele (1934), Clench & Turner (1956)
Elliptoideus sloatianus — Morrison (1966), Burch (1975), Davis (1984), Turgeon et al. (1988), Williams et al. (1993), ... Graf & Cummings (2021), FMCS (2021), Hopper et al. (2023), FMCS (2025), Campbell & Lydeard (2026)
Nephronaias (Elliptoideus) sloatiana — Haas (1969)
Plectomerus dombeyana — Oesch (1984)
Plectomerus dombeyanus — Howells et al. (1996)

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’].

Unio (sec. Elliptio) sloatianus — Simpson (1900)
Unio (sec. Elliptio) (Group of U. sloatianus) sloatianus — Simpson (1914)
Elliptio (Elliptoideus) sloatianus — Frierson (1927), Haas (1969)
Elliptio sloatianus — Clench & Turner (1956)
Elliptoideus sloatianus — Burch (1975), Brim Box & Williams (2000), Williams et al. (2008), Williams et al. (2011), Williams et al. (2014)
Plectomerus dombeyana — Oesch (1984)
Plectomerus dombeyanus — Howells et al. (1996)

Unio plectophorus Conrad, 1849

(correct name for Unio plectrophorus Conrad, 1849)
Conrad, 1849. Proc. Acad. Nat. Sci. 4: 154 [as ‘plectrophorus’].
Conrad, 1850. Jour. Acad. Nat. Sci. 1: 277, pl. 38, fig. 7.
Conrad, 1853. Proc. Acad. Nat. Sci. 6: 261 [as ‘Plectomerus plectophorus’].

Unio (sec. Elliptio) sloatianus — Simpson (1900)
Unio (sec. Elliptio) (Group of U. sloatianus) sloatianus — Simpson (1914)
Elliptio (Elliptoideus) sloatianus — Frierson (1927), Haas (1969)
Elliptio sloatianus — Clench & Turner (1956)
Elliptoideus sloatianus — Burch (1975), Brim Box & Williams (2000), Williams et al. (2008), Williams et al. (2011), Williams et al. (2014)

Unio aratus Conrad, 1849

(homonym of Unio aratus Lea, 1843)
Conrad, 1849. Ann. Mag. Nat. Hist. 4: 302.
Conrad, 1849. Proc. Acad. Nat. Sci. 4: 154.

Unio (sec. Elliptio) sloatianus — Simpson (1900)
Unio (sec. Elliptio) (Group of U. sloatianus) sloatianus — Simpson (1914)
Elliptio (Elliptoideus) sloatianus — Frierson (1927), Haas (1969)
Elliptio sloatianus — Clench & Turner (1956)
Elliptoideus sloatianus — Burch (1975), Brim Box & Williams (2000), Williams et al. (2008), Williams et al. (2014)

Unio plectrophorus Conrad, 1849

(incorrect original spelling of Unio plectophorus Conrad, 1849)
Conrad, 1849. Proc. Acad. Nat. Sci. 4: 154.

Elliptio sloatianus — Clench & Turner (1956)
Elliptoideus sloatianus — Williams et al. (2008)

Margaron (Unio) plectoforus Lea, 1852

(error for Unio plectophorus Conrad, 1849; reference to Unio plectiforus Lea, 1852)
Lea, 1852. Synopsis Fam. Naiades: corrigenda et addenda.
Lea, 1870. Synopsis Fam. Naiades: 31.

Elliptio (Elliptoideus) sloatianus — Frierson (1927)

Unio plectiforus Lea, 1852

(error for Unio plectophorus Conrad, 1849)
‘Conrad’ Lea, 1852. Synopsis Fam. Naiades: 21.

Unio aloatinus Haas, 1969

(error for Unio sloatianus Lea, 1840)
‘Lea’ Haas, 1969. Das Tierreich 88: 213.