BALTIMORE, Nov. 21 (UPI) -- Some 55 million years ago, the Indian subcontinent was still a floating island, making its way to a dramatic tectonic collision with Asia. About the time, scientists say, an animal dubbed Cambaytherium thewissi emerged. According to a new study, Cambaytherium is an ancient cousin of horses, rhinos and tapirs -- a group (or order) of modern animals known as Perissodactyla, or odd-toed ungulates.
Researchers have been able to trace the ancestors of modern horses, rhinos and tapirs as far back as the beginnings of the Eocene epoch, about 56 million years ago, but the story of the evolution of early odd-toed ungulates remained muddled. Now, researchers newfound understanding of Cambaytherium has shed some light on the group's emergence.