I'm hoping someone can help me. I found this beautiful shark tooth at Ramsholt, Suffolk on Saturday. My initial thoughts were that it was a Cosmopolitodus hastalis tooth, which are faily common at Ramsholt. However, on closer examination, the cutting edges of the tooth appear to be serrated which suggests it could be something else. I remember reading somewhere that Cosmos are believed to be related to Great White Sharks (Caracharodon) on account of their similar dentition, but that Cosmo teeth always have smooth edges, whereas Carcharodon teeth are serrated. I appreciate the serrations are fairly faint, but my understanding is that these teeth are from earlier Miocene strata and were redoposited in the Red Crag sediments, and were abraded quite heavily prior to being re-fossilised in the Red Crag. Can anyone confirm the ID of this tooth?