There are a total of 7 types of dragon species in the game. 2 of these species become available only after winning the WDC Title.
The Beetle Species is one of two type of Insect Dragon Species. They can be generated with the Fire or Storm special attribute.
The Wasp Species is one of two type of Insect Dragon Species. They can be generated with the Aqua or Storm special attribute. While they can fly, as is the case with Saurians, flight does not offer any particular advantage.
The Crustacean Species, as the name would imply, resembles large crabs. They can only be generated with the Aqua attribute.
The Natura Species of Dragon is rather unique in that their bodies are composed entirely of inorganic compounds. They can only be generated with the Storm attribute.
The Spirit Species of Dragon resemble a lion or sphinx in appearance. They can have the Fire, Storm, or Aqua Special attribute.
The Evil Dragon Species are perhaps the strangest breed of Dragon as they resemble sentient doors in most stages of life. They can have the Fire, Storm, or Aqua attributes.