Isurus Rafinesque, 1810
Large fusiform sharks with a rather slender trunk and conical very pointed snout; teeth slender, smooth-edged, without tateral cusplets; the first two teeth in each jaw more slender and more flexible than the others. First dorsal fin origin always posterior to inner corner of pectoral fins; caudal pits present as transverse furrows; caudal fin without a secondary longitudinal keel below the main caudal keel.
See family for biology, etc.
Species 2; in Clofnam area 2.
Recent revisions: Guitart Manday (1966), Garrick (1967), Springer (1977), Compagno (1981 and in press).
Species of this genus in the program:
Isurus oxyrinchus
Isurus paucus