I bought this coin in a Teletrade auction and did not notice the rim defect (located at about 2:00 on the reverse) in the auction photos. A segment of the denticles has cracked or split open and is partially lifted up from the surface. The rim itself appears to have a tiny dent here but the split does not continue into the rim. Would this be called a planchet defect, split planchet, or maybe a delamination? PCGS graded the coin PR-63 so presumably they did not consider it to be post-mint damage.
A "normal" 1878 20-cent piece is an expensive coin and I wonder whether the defect on my specimen would be likely to hurt the market value. Any opinions?

