Pentanchidae is a family of sharks belonging to the order Carcharhiniformes. Genera: Apristurus Garman, 1913 Asymbolus Whitley, 1939 Cephalurus Bigelow & Schroeder, 1941 Galeus Rafinesque, 1810 Halaelurus Gill, 1862 Holohalaelurus Fowler, 1934... Wikipedia