I am not sure what species this Cretaceous shark tooth belonged to. It comes from Kansas but I really do not have much more information. It is 2 cm on the slant. It is really a nice tooth and it was a bargain. My best guess is Archeolamna which I believe is found in the chalk in Kansas. I do not think it is robust enough to be Cardabiodon and I do not know what other species it would match from the area. Any help would be appreciated.