Wyrm/Ormr/Verm/Worm

The Wyrm is a form of dragon originating in Norse myth. They’re described as serpentine creatures and deemed dragons when large enough. The earliest known depiction of this creature is a wood panel from the year 1100. This image shows a Wyrm with an open mouth filled with teeth, eating a person. It had almond-shaped eyes, a curved nose on a long snout, a recurved horn, and ears that were laid back. Its long neck was in two coils, and it appeared it may have had a rider on its back at some point.

Citations:

Bane, Theresa. Encyclopedia of Beasts and Monsters in Myth, Legend and Folklore. United States, McFarland, Incorporated, Publishers, 2016.