Madagascar is home to an abundance of beautiful and unusual animals many of whom are unique to Madagascar because of its relative isolation. This is not just any isolation, Madagascar was once a part of the supercontinent Pangea but between 160–117 million years ago, it began separating, rifting southward over 1000 km away from the Africa plate. The Middle Jurassic is one of the key periods in the evolution of life on earth. Many groups, including dinosaurs and mammals, diversified during this time. The Opluridae, or Madagascan iguanas, are a family of moderately sized lizards native to Madagascar and Grande Comore islands. There are eight species in two genera, with most of the species being in Oplurus. The family includes species that live amongst rocks, some that live in trees, and two that prefer sandy habitats. All of the species lay eggs, and have teeth that resemble those of the true iguanas. A study of mitochondrial DNA sequences has dated the split between Opluridae and the New World Iguanidae (within which Opluridae are sometimes classified as the subfamily Oplurinae) at about 165 million years ago, during the Middle Jurassic.