Great examples of a very unusual and rare, Squalicorax bassinii species (similar to a S. kaupi on steriods), an extinct Crow shark . These teeth are large for this species and the characteristic S. bassanii shape is very unusual. Upper Cretaceous age (72 million years ago). Collector's quality teeth. Note - there is a very limited amount of these unusual, very rare Squalicorax teeth are available.