†Diodora tenebrosa antica Harris and Palmer 1947 (keyhole limpet)
Gastropoda - Lepetellida - Fissurellidae
Full reference: G. D. Harris and K. E. H. Palmer. 1947. The Mollusca of the Mississippi Embayment (Sabine River to the Alabama River). Pt. II. Univalves and index. Bulletins of American Paleontology 30(117):207-563
Belongs to Diodora tenebrosa according to G. D. Harris and K. E. H. Palmer 1947
Sister taxon: Diodora tenebrosa veatchi
Type specimen: PRI 2661
Ecology: facultatively mobile epifaunal grazer-carnivore
Distribution:
• Eocene of United States (3: Louisiana, Mississippi, South Carolina collections)
Total: 3 collections each including a single occurrence