Pyramidula alternata (Say, 1817) accepted as Anguispira alternata (Say, 1817) (additional source)
Pyramidula alternata carinata Pilsbry, 1896 accepted as Anguispira alternata var. carinata (Pilsbry, 1896) (basis of record)
Pyramidula alternata costata (J. Lewis, 1871) accepted as Anguispira alternata (Say, 1817) (basis of record)
Pyramidula alternata fergusoni (Bland, 1862) accepted as Anguispira fergusoni (Bland, 1862) (basis of record)
Pyramidula alternata mordax (Shuttleworth, 1852) accepted as Anguispira mordax (Shuttleworth, 1852) (basis of record)
Pyramidula alternata rarinotata Pilsbry, 1900 accepted as Anguispira strongylodes (Reeve, 1854) (basis of record)
Pyramidula alternata var. alba (Tryon, 1866) accepted as Anguispira alternata (Say, 1817) (basis of record)
Pyramidula alternata var. knoxensis Pilsbry, 1901 accepted as Anguispira knoxensis (Pilsbry, 1901) (original description)