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The Freshwater Mussels (Unionoida) of the World (and other less consequential bivalves)
FM(U)otW(aolcb) is the web version of the MUSSEL Project Database. Follow the links to browse the data or use the custom Google search field. Either way, you win!
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Bivalvia | Unionida | Unionoidea | Unionidae | Ambleminae | Quadrulini | Megalonaias species Megalonaias nickliniana (Lea, 1834): synonymy
29 specimens Unio nicklinianus Lea, 1834
  Lea, 1834. Trans. Amer. Phil. Soc. 5 [O. 1]: 28 [140], pl. 1, fig. 1.
Type(s): HOLOTYPE (MONOTYPY) USNM_83898, Canton China? [Central America].
Quadrula (sec. Crenodonta) nickliniana — Simpson (1900), Simpson (1914)
Unio (Crenodonta) nicklinianus — Martens (1900)
Quadrula nickliniana — Pilsbry (1910)
Amblema (Megalonaias) nickliniana — Frierson (1927)
Crenodonta nickliniama [sic] — Haas (1929)
Megalonaias nickliniana nickliniana — Haas (1969)
Megalonaias nickliniana — Contreras-Arquieta (2000), Graf & Cummings (2007), Bogan (2010), Graf & Cummings (2021), Czaja et al. (2023), Cummings et al. (2025), Campbell & Lydeard (2026)
Megalonaias nicklineana [sic] — ITIS (2012)
Megalonaias nervosa — Pfeiffer et al. (2018) | |
Unio digitatus Morelet, 1851
 Morelet, 1851. Test. Nov. 2: 24.
Type(s): LECTOTYPE [AS HOLOTYPE] BMNH_93-2-4-2035 (by R.I. Johnson, 1971: 82), flumen Usumacinta, Peten, Guatemala.
Quadrula (sec. Crenodonta) digitata — Simpson (1900), Simpson (1914)
Unio (Crenodonta) digitatus — Martens (1900)
Amblema (Megalonaias) nickliniana-digitata — Frierson (1927)
Crenodonta digitata — Haas (1929)
Amblema digitata — Goodrich & van der Schalie (1937)
Megalonaias nickliniana digitata — Haas (1969)
Megalonaias digitata — Contreras-Arquieta (2000)
Megalonaias nervosa — Pfeiffer et al. (2018)
Megalonaias nickliniana — Cummings et al. (2025) | |
Unio (Crenodonta) stolli Martens, 1900
 Martens, 1900. Biol. Centr.-Amer., Moll.: 492, pl. 29, fig. 2.
Type(s): HOLOTYPE (MONOTYPY) ZMB_39464, Rio de las Salinas, Guatemala.
Quadrula (sec. Crenodonta) stolli — Simpson (1900), Simpson (1914)
Unio (Crenodonta) stolli — Martens (1900)
Amblema (Megalonaias) nickliniana-digitata — Frierson (1927)
Crenodonta stolli — Haas (1929)
Megalonaias nickliniana digitata — Haas (1969)
Megalonaias nervosa — Pfeiffer et al. (2018)
Megalonaias nickliniana — Cummings et al. (2025) | |
Unio nicklianus Küster, 1861
‘Lea’ Küster, 1861. Conchyl. Cab. 9(2): 218.
(error for Unio nicklinianus Lea, 1834)
Quadrula (sec. Crenodonta) nickliniana — Simpson (1900), Simpson (1914)
Unio (Crenodonta) stolli — Martens (1900)
Megalonaias nickliniana nickliniana — Haas (1969) | |
Crenodonta nickliniama Haas, 1929
‘Lea’ Haas, 1929. Senckenbergiana 11: 333.
(error for Unio nicklinianus Lea, 1834) | |
Megalonaias nicklineana ITIS, 2012
ITIS, 2012. ITIS: [web].
(error for Unio nicklinianus Lea, 1834) | |
Taxonomic History (since 1900)Quadrula (sec. Crenodonta) nickliniana — Simpson (1900), Simpson (1914)
Unio (Crenodonta) nicklinianus — Martens (1900)
Quadrula (sec. Crenodonta) digitata — Simpson (1900), Simpson (1914)
Unio (Crenodonta) digitatus — Martens (1900)
Unio (Crenodonta) stolli — Martens (1900)
Quadrula (sec. Crenodonta) stolli — Simpson (1900), Simpson (1914)
Quadrula nickliniana — Pilsbry (1910)
Amblema (Megalonaias) nickliniana — Frierson (1927)
Amblema (Megalonaias) nickliniana-digitata — Frierson (1927)
Crenodonta nickliniama [sic] — Haas (1929)
Crenodonta digitata — Haas (1929)
Crenodonta stolli — Haas (1929)
Amblema digitata — Goodrich & van der Schalie (1937)
Megalonaias nickliniana nickliniana — Haas (1969)
Megalonaias nickliniana digitata — Haas (1969)
Megalonaias nickliniana — Contreras-Arquieta (2000), Graf & Cummings (2007), Bogan (2010), Graf & Cummings (2021), Czaja et al. (2023), Cummings et al. (2025), Campbell & Lydeard (2026)
Megalonaias digitata — Contreras-Arquieta (2000)
Megalonaias nicklineana [sic] — ITIS (2012)
Megalonaias nervosa — Pfeiffer et al. (2018)
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