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Alasmodon falcata Gould, 1850

Gould, 1850. Proc. Boston Soc. Nat. Hist. 3: 294.
Type(s): HOLOTYPE USNM_5929A, Walla Walla, Wash. Ter.

Margaritana margaritifera — Simpson (1900), Preston (1912), Simpson (1914), Frierson (1927)
Margaritana margaritifera falcata — Hannibal (1912), Ortmann (1913)
Margaritifera margaritifera falcata — Henderson (1935)
Margaritifera (s.s.) margaritifera margaritifera — Haas (1969)
Margaritifera falcata — Heard & Guckert (1970), Burch (1975), R.I. Johnson (1980), Davis & Fuller (1981), Kat (1983), ... Wu et al. (2023), Dai et al. (2025), Chen et al. (2025), FMCS (2025), Chen et al. (2025)
Margaritanopsis falcata — D.G. Smith (2001)
Margaritifera (s.s.) falcata — Bolotov et al. (2016)

Alasmodon yubaensis Trask, 1854

Trask, 1854. Proc. Calif. Acad. Sci. 1: 29.

Margaritana margaritifera — Simpson (1900), Preston (1912), Simpson (1914), Frierson (1927)
Margaritana margaritifera falcata — Hannibal (1912)
Margaritifera (s.s.) margaritifera margaritifera — Haas (1969)
Margaritifera falcata — Ziuganov et al. (1994), IUCN (2016)

Margaritifera falcate Cummings & Graf, 2010

Cummings & Graf, 2010. Ecol. Class. N. Amer. FW Inverts.: 375.
(error for Alasmodon falcata Gould, 1850)