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Hi TFF friends, it's been a while. I hope you're all fine. This week, I explored my favorite place in Kumamoto prefecture (trip report coming these week-end) and found the following fossil. First time I saw such fossil from this location. I have browsed the literature related to this location but I unfortunately didn't find any clues about what this fossil could be. I suspect this could be some kind of fish tooth. In the all the papers I read about this location, I found some mentions of fish material found there but no description or further information. I was wondering if this could be some kind of Pycnodont tooth, the general shape matches and we can see in cross section the kind of fold where the root is missing. However the regular grooves on the surface makes me doubt about my guess a little bit as I think that Pycnodont tooth are "smooth" . If any one has a guess about what it could be, do not hesitate to throw it in the comments. Any help is welcome. Size: 8mm by 3mm Himenoura Formation (lower) Late Cretaceous (Santonian) Kumamoto prefecture, Japan