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Unio largillierti Philippi, 1847

Philippi, 1847. Z. Malak. 4: 94.
Type(s): NEOTYPE MCZ_155569 (by R.I. Johnson, 1951: 79), San Geronimo, Campeche, Mexico. “Interior of Yucatan” according to the MCZ database.

Lampsilis (Proptera) largillierti — Simpson (1900), Simpson (1914)
Unio (Metaptera) paludosus — Martens (1900)
Potamilus largillierti — Graf & Cummings (2007)
Delphinonaias largillierti — Graf & Cummings (2021), Czaja et al. (2023), Cummings et al. (2025)

Unio delphinulus Morelet, 1849

Morelet, 1849. Test. Nov. 1: 31.
Type(s): LECTOTYPE BMNH_93-2-4-1588 (by Cummings et al., 2025: 164), Lac de Flores, Peten, Guatemala.

Lampsilis (Proptera) delphinulus — Simpson (1900), Simpson (1914)
Unio (Metaptera) delphinulus — Martens (1900)
Lampsilis (Delphinonaias) delphinulus — Frierson (1927), Haas (1929), Haas (1969), Haas (1969)
Lampsilis (sec. Delphinonaias) delphinulus — Thiele (1934)
Leptodea paludosa — Goodrich & van der Schalie (1937)
Delphinonaias delphinulus — Graf & Cummings (2007), Bogan (2010), Zieritz et al. (2013)
Delphinonaias largillierti — Graf & Cummings (2021), Cummings et al. (2025)

Unio paludosus Morelet, 1849

Morelet, 1849. Test. Nov. 1: 30.
Type(s): LECTOTYPE BMNH_93-2-4-2024 (by R.I. Johnson, 1971: 90), propre San Geronimo, Yucatan.

Lampsilis (Proptera) paludosus — Simpson (1900)
Unio (Metaptera) paludosus — Martens (1900)
Lampsilis (Proptera) paludosa — Simpson (1914)
Lampsilis (Delphinonaias) paludosa — Frierson (1927)
Lampsilis (sec. Phyllonaias) paludosus — Thiele (1934)
Leptodea paludosa — Goodrich & van der Schalie (1937)
Lampsilis (Phyllonaias) paludosa — Haas (1969), Haas (1969)
Delphinonaias paludosa — Graf & Cummings (2007), Bogan (2010)
Delphinonaias largillierti — Graf & Cummings (2021), Cummings et al. (2025)

Unio planivalvis Morelet, 1851

Morelet, 1851. Test. Nov. 2: 24.
Type(s): LECTOTYPE [AS HOLOTYPE] BMNH_93-2-4-2025 (by R.I. Johnson, 1971: 91), pres du Rio Usumacinta, Dept. Peten, Guatemala.

Lampsilis (Proptera) planivalvis — Simpson (1900), Simpson (1914)
Unio (Metaptera) paludosus var. planivalvis — Martens (1900)
Lampsilis (Delphinonaias) planivalvis — Haas (1929)
Leptodea paludosa — Goodrich & van der Schalie (1937)
Lampsilis (Phyllonaias) planivalvis — Haas (1969)
Delphinonaias planivalvis — Graf & Cummings (2007), Bogan (2010), Czaja et al. (2023)
Delphinonaias largillierti — Graf & Cummings (2021), Cummings et al. (2025)