365-Million-Year-Old Fish With Extreme Underbite Showcases Vertebrate Diversity
Alienacanthus is a member of an extinct group of fish called placoderms Vertebrates are defined as all animals that possess a vertebral column, or backbone. Most living vertebrates also possess jaws, teeth and paired fins or limbs. Fossils of the earliest vertebrates help us understand not only how these features originated, but also how they … Read more