Gardner, J., 1945. Mollusca of the Tertiary Formations of Northeastern Mexico. Memoir - Geological Society of America, 11.
New Species-Group Names:
- haighti Gardner, 1945. p. 252. pl. 26. f. 2. 7.
- santander Gardner, 1945. p. 251. pl. 26. f. 5. 9. 10. 14.