Acteon costellatus Conrad, 1833
Acteon costellatus Conrad, 1833b: 45.
Type locality.
Claiborne Bluff, Alabama River, Monroe County, Alabama, USA; stratum: Gosport Sand (uppermost Claiborne Group); age: Eocene.
Type material.
Lost (Harris 1895a: 13, Palmer 1937: 501, Moore 1962: 50).
Current taxonomic status.
Acteon costellatus Conrad, 1833 is considered a species inquirenda (Salvador and Cunha 2016).