This shark is called the "Snaggletooth", because of the very large serrations.  Two of the most common places to find these fossilized teeth are Florida and North Carolina's Lee Creek Mine.  The teeth can also be found in other places (but they are rare).  You may see a tooth in our inventory from Bakersfield, CA.  If so, that may be all you will find like that (from California) for sale anywhere.

This large shark species is extinct, but there is a related smaller species that still exists in the Far East, named Hemipristis elongatus.  The jaw from that smaller modern species (which was only discovered a few years ago) is the best reference available to help determine the relationship of differently shaped teeth from the extinct species (Hemipristis serra).  The upper and lower jaw teeth are very different.  Also, the anterior, lateral and posterior teeth can be very different.  Often, the Snaggletooth lower jaw teeth are confused with other shark species, because they are so different from the upper jaw teeth and because they are somewhat similar to the teeth from other species.  In some of the older reference books, you will even see Snaggletooth lower jaw teeth referred to as teeth from an extinct Sandtiger species.