Frierson, L.S. 1914. Remarks on classification of the Unionidae. Nautilus 28: 6-8. Available electronically.
‘Ortmann’ Frierson, 1914. Nautilus 28: 7.
(error for Paraptera Ortmann, 1911)
Type species: Unio gracilis Barnes, 1823 = Potamilus fragilis
Frierson, 1914. Nautilus 28: 7.
(renamed Simpsoniconcha Frierson, 1914)
Type species: Alasmodonta ambigua Say, 1825 (orig. desig.) = Simpsonaias ambigua
‘Lea’ Frierson, 1914. Nautilus 28: 7.
(error for Unio hildrethianus Lea, 1834)