Rachitrema
 Rachitrema is a poorly known genus of prehistoric reptile from the Triassic of France. Its remains were found in France by two independent collectors towards the end of the nineteenth century. They were only isolated bone fragments.The result of such minimal findings is that the classification of this creature is uncertain. It has variously been described as a dinosaur and an ichthyosaur. For this reason the scientific classification data that are provided in this article are minimal.