Unknown selachians from New Mexico's Coniacian Take 5

[readinghiker]

  Hello all!  I have finally finished sorting close to 300 pounds of anthill from north central New Mexico.  I recovered (literally) close to 18,000 fossils!  Most are identifiable, but there are a few that I can't put a name to. I am going to put up several for your expert analysis (not being facetious, you guys have an enormous amount of knowledge!) to see what you have to say.  I will repeat this introduction for each grouping of photos, only changing the take number.  Thank you all in advance!   This fossil is somewhat like a cretolamnid, but is very small.  An extreme cretolamnid lateral tooth?