Perissodactyla, Artiodactyla and Primates ... origin of these orders is one of the great conundrums of mammalian evolution. Perissodactyls, including extant horses, rhinoceroses and tapirs ...

Though paleontologists had found remains of Perissodactyla from as far back as the beginnings of the Eocene epoch (about 56 million years ago), their earlier evolution remained a mystery, says Ken ...

Though paleontologists had found remains of Perissodactyla from as far back as the beginnings of the Eocene epoch, about 56 million years ago, their earlier evolution remained a mystery ...

(2010). Postcranial Functional Morphology of Hyracotherium (Equidae, Perissodactyla) and Locomotion in the Earliest Horses Journal of Mammalian Evolution DOI: 10.1007/s10914-010-9145-7 ...

What exactly this creature was puzzled scientists, including the father of evolution ... they're part of a group called Perissodactyla. The animal's lineage and that of modern perissodactyls ...

This story appears in the October 2016 issue of National Geographic magazine. Perissodactyla, roughly translated, means “odd number of toes.” It’s the order of mammals that includes rhinos ...