nominal species Unio digitatus Morelet, 1851
Morelet, 1851, Test. Nov. 2: 24.
Type(s): HOLOTYPE BMNH_93-2-4-2035, flumen Usumacinta, Peten, Guatemala.
= Megalonaias nickliniana Taxonomic Opinions
+ Megalonaias nervosa (Rafinesque, 1820) — (Pfeiffer et al., 2018)
= Megalonaias nickliniana digitata (Morelet, 1851) — (Haas, 1969)
= Amblema digitata (Morelet, 1849) — (Goodrich & van der Schalie, 1937)
= Crenodonta digitata (Morelet) — (Haas, 1929)
= Amblema (Megalonaias) nickliniana-digitata (Morelet, 1851) — (Frierson, 1927)
= Quadrula (sec. Crenodonta) digitata (Morelet, 1851) — (Simpson, 1914)
= Quadrula (sec. Crenodonta) digitata (Morelet, 1851) — (Simpson, 1900)
= Unio (Crenodonta) digitatus Morelet, 1851 — (Martens, 1900)
= Unio (Plectomerus) digitatus Morelet, 1851 — (Fischer & Crosse, 1894)
- NO OPINION — (Lea, 1870)
- NO OPINION — (Lea, 1852)
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