Really cool thread, and some great twin imagery. Thanks you guys.

I'm with Smalma on this one though. You won't have external evidence of tooth marks on a healed old scar which grew scales over the top of it. The rescaled surface is going to hide your Chinaman. The pattern depicted in the later image is on a smooth non-scaled surface, so it really won't have the same healed appearance. Also absence of deeper abnormality seems to kill the twin theory.

I vote lamprey mark. Either way, cool case.

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