Gastonia was an Ankylosaur that was 20 feet long and 3 feet tall. It had thick armor with very long spikes protruding from the shoulders and back of Gastonia. It had a row of triangular spikes running down the sides of its tail that acted like knifes when it hit something. If its plates are not bad enough, its tail plates are covered with long keratin that made the places even longer and more deadly. The plates also interlocked to act like scissors and cut right through any attacker's flesh. It lives in middle Cretaceous Utah and lived with Utahraptor, so it had use its defenses often.