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Alasminota Ortmann, 1914

Ortmann, 1914. Nautilus 28(4): 41.
Ortmann & Walker, 1922. Occ. Pap. Mus. Zool. Univ. Mich. (112): 33.
Ortmann, 1923. Nautilus 36(3): 83.
Ortmann, 1924. Amer. Midl. Nat. 9(1): 22.
(intro'd as sub-gen. of Symphynota Lea, 1829)
Type species: Margaritana holstonia Lea, 1838 (orig. desig.) = Alasminota holstonia

Prolasmidonta Ortmann, 1914

Ortmann, 1914. Nautilus 28(4): 44.
(intro'd as sub-gen. of Alasmidonta Say, 1818)
Type species: Unio heterodon Lea, 1829 (orig. desig.) = Prolasmidonta heterodon

Pterosygna Simpson, 1900

‘Rafinesque’ of Authors.
Simpson, 1900. Proc. U.S. Nat. Mus. 22: 665.
Ortmann, 1909. Ann. Carnegie Mus. 5: 196.
Simpson, 1914. Descr. Cat. Naiades: 490.
Ortmann, 1914. Nautilus 28(4): 43.
Walker, 1918. Occ. Pap. Mus. Zool. Univ. Mich. (49): 2.
F.C. Baker, 1928. Bull. Wisconsin Geol. Nat. Hist. Survey 70(2): 147.
Haas, 1930. Senckenbergiana 12(6): 326.
(error for Pterosyna Rafinesque, 1831)
Type species: Alasmodonta complanata Barnes, 1823 = Pterosyna complanata

Symphynota Simpson, 1900

‘Lea’ of Authors.
Simpson, 1900. Proc. U.S. Nat. Mus. 22: 662.
Ortmann, 1912. Ann. Carnegie Mus. 8: 280.
Simpson, 1914. Descr. Cat. Naiades: 480.
Ortmann, 1914. Nautilus 28(4): 41.
(reference to Symphynota Lea, 1829)
Type species: Symphynota compressa Lea, 1829 (orig. desig.) = Platynaias compressa