Publication Thompson (1820): summary

Thompson, 1820. Ann. Phil. 16: 116.
‘Say’ Sowerby, 1824. Zool. Jour. 1: 54.
‘Say’ Sowerby, 1839. Conch. Man.: 2.
‘Say’ Swainson, 1840. Treat. Malacol.: 262, 264, 266, 269-274, 278-279, 290, 382.
De Kay, 1843. Zool. New York 5: 196.
‘Say’ Brown, 1844. Ill. Rec. Conch. Gr. Brit. & Ireland: 83.
‘Say’ Woodward, 1871. Man. Moll: 433.
(error for Alasmodonta Say, 1819; renamed Anelasmodon Agassiz, 1846)
Type species: Unio undulata Say, 1817 = Alasmidonta undulata