It contains a single extant species, the tawny nurse shark (Nebrius ferrugineus), as well as a number of extinct species dating back to the Early Paleocene.[1]
See also
List of prehistoric cartilaginous fish
Notes and References
Bourdon, J. (2007). Fossil Genera: Nebrius. The Life and Times of Long-Dead Sharks. Retrieved on June 7, 2009.