Answer
Giant puffball (Calvatia gigantean), though one a bit past its prime by the time the photo was taken. “They are delicious before worms get into them, which seems to happen all too quickly,” says Ginny Barlow. “Maybe the bite marks have been made by squirrels?” She recommends checking the same site next year, a bit earlier in the fall.
This week’s contest winner was Germaine Connolly of Hamilton, VA