Fire dragons

Fire dragons are one of the dragon species in the world of Draconis. They have two subspecies, Lava and Inferno.

Ancient Fire Dragons
Ancient fire dragons have a lizard-like appearance. They are slender with spiked jaws and a forked tongue. Their ears are elf-like, and they appear to have a brittle jaw. They have humanoid hands and large talons with arching horns. Down their bodies are flames, ranging fro small embers to large fires.

Lava Dragons
Lava dragons are similar to their ancient counterparts, but are more aggressive in appearance. They have a more dinosaur-like face and their bodies are less muscular. They also have a long, whip thin tail and wings that match up with several tattered and torn dorsal fins on their backs.

Inferno Dragons
Inferno dragons have a more demonic look, with ram horns and flaming tails. They also have wings like lava dragons, but they are bipedal. Inferno dragons have six tail tips, each one alight with flames matching their mane. They have sharp fangs. They appear to be based off vampires and demons.

Trivia

 * Each of these dragons seem to be based on something unique. The Ancients look like a prestosuchus on fire, Lava seem to be based on traditional dragons, and Inferno seem to be based on Hell spirits.