Keichousaurus

Keichousaurus was a small reptile from the Late Triassic Period in China, living about 202 million years ago. Paleontologists have been able to identify male and female individuals of Keichousaurus thanks to a fossil of a pregnant female who hadn’t laid her eggs yet. This showed that female Keichousaurus were smaller than males, with shorter necks and tails. Females reached 4 inches in length, while males reached 6 inches long. Keichousaurus likely used its peg like teeth to eat small fish.