Final answer:
The preserved remains referred to as the 'Bog Man' are not a species but denote well-preserved ancient human remains found in the peat bogs of Northern Europe, dating back to the Iron Age.
Step-by-step explanation:
The preserved remains of a 3rd century man found in Denmark is known as the Bog Man. This does not refer to any of the examples provided in the provided reference material, such as Homo heidelbergensis, Neanderthals, or Homo floresiensis. The Bog Man is associated with the Iron Age and is one of the numerous ancient human remains discovered in the peat bogs of Northern Europe, noted for their remarkable preservation due to the unique conditions of the bogs. Unlike the Cro-Magnon Man or Neanderthal Man, the Bog Man is not a species or subspecies but rather refers to the state of preservation and the archaeological findings of human remains in bog environments.