Shovel teeth. The upper front four and the lower front four teeth are not flat, but are hollowed out with a ridge just above the gum line. Also, the ridge theme also applies to the back of the skull where it meets the neck. There is a ridge there which is so pronounced that it stops the fingers from being able to trace up the back of the head. This is the way my teeth and head are, but my characteristics come from Native American heritage from both sides of my family mixed with European. Before I read about this, I used to wonder why my teeth felt like that when I ran my tongue over them, but now I know more about my ancestors and understand. I don't know about Melungeons, mine were Black Dutch. Everyone is a melange, I guess, and fascinating.
Earlier today I discovered I had shovel teeth but had my hair up so I couldn't test for the ridge on the bakc of my head....I've got the ridge too it turns out. But, I'm pretty sure I'm not Melungeon. However, if Melungeon is a mix of Mediterranean and Indian, then my Spanish and Indian mix could come pretty close, especially if my Spanish includes Moorish as the Melungeons might have been Moors as well.