toddler has extra tooth

my 15 month old has a tooth, or tooth-like growth, coming in behind his right maxillary incisor.    As of now only a small tip is visible.  It does not seem to be causing any discomfort; I noticed it when retrieveing a bit of paper he was attempting to eat.  His four upper and four lower teeth have come in without problems.  I've read that supernumary teeth are fairly common, but do they typically errupt so soon?    Most of what I've found on the internet sites examples in older children or adults.  Should I see my pediatrician or seek out a pediatric dentist?    

[scottma]

Seeing a pediatric dentist is advised.