Pictet, F.-J. (1845)
Traité élémentaire de paléontologie; ou, Histoire naturelle des animaux fossiles, considérés dans leurs rapports zoologiques et géologiques. Paris, Langlois et Leclerq, 1844-46, vol. II, pp. 259-310
Cope, E.D. (1867)
An addition to the vertebrate fauna of the Miocene period, with a synopsis of the extinct Cetacea of the United States. Proceedings of the Academy of Natural Sciences of Philadelphia, 19, 138–156
Lawley, R. (1876)
Nuovi studi sopra ai pesci ed altri vertebrati fossili delle Colline Toscane. Firenze, Tipografia dell Arte della Stampa: 1–122, pl. 1–5.