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Unio granadensis Lea, 1868

Lea, 1868. Proc. Acad. Nat. Sci. 20: 95.
Lea, 1868. Jour. Acad. Nat. Sci. 6 [O. 12]: 293 [53], pl. 42, fig. 103.
(renamed Micronaias marshalli Morrison, 1943)
Type(s): LECTOTYPE [AS HOLOTYPE] USNM_84388 (by Johnson & Baker, 1973: 156), Lake Nicaragua, Nicaragua.

Unio (sec. Micronaias) granadensis — Simpson (1900), Simpson (1914)
Unio (Arotonaias) granadensis — Martens (1900)
Elliptio (Micronaias) granadensis — Frierson (1927), Haas (1929), Haas (1969)
Micronaias granadensis — Graf & Cummings (2007), Bogan (2010), Graf & Cummings (2021), Cummings et al. (2025)

Unio aratus Martens, 1900

Martens, 1900. Biol. Centr.-Amer., Moll.: fig. ??.
(misidentified reference to Unio aratus Lea, 1843)

Elliptio (Micronaias) granadensis — Frierson (1927)

Micronaias marshalli Morrison, 1943

Morrison, 1943. Nautilus 57: 15.
(new name for Unio granadensis Lea, 1868)

Micronaias granadensis — Cummings et al. (2025)