Gibbes, R.W. (1847)
Description of new species of Squalidae from the Tertiary beds of South Carolina. Proceedings of the Academy of Natural Sciences of Philadelphia, 3, 266–268
Gibbes, R.W. (1849)
Monograph of the fossil Squalidae of the United States. Art. 14. Journal of the Academy of Natural Sciences of Philadelphia, 1(ser. 2): 191–206, pl. 25–27