Side of a right triangle which is adjacent to the right angle.
1M. catheti lived only 15 million years before the ichthyosaurs died out.
2Like others in its group, M. catheti had large eyes, slender jaws and small teeth.
3Ichythosaurs like M. catheti roamed the ocean from the Triassic period to the Cretaceous, between 250 and 100 million years ago.