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Rhinos and tapirs are more closely related to each other than to horses. The separation of horses from other perissodactyls took place according to molecular genetic analysis in the Paleocene some 56 million years ago, while the rhinos and tapirs split off in the lower-middle Eocene, about 47 million years ago.
Brontotheriidae is a family of extinct mammals belonging to the order Perissodactyla, the order that includes horses, rhinoceroses, and tapirs.Superficially, they looked rather like rhinos with some developing bony nose horns, and were some of the earliest mammals to have evolved large body sizes of several tonnes.
Rhinocerotidae contains five species of rhinoceroses split into four genera, Tapiridae contains four species of tapir in a single genus, and Equidae contains nine species in a single genus, including horses, donkeys, and zebras. Over 75 extinct Perissodactyla species have been discovered, though due to ongoing research and discoveries the exact ...
This list of fictional pachyderms is a subsidiary to the List of fictional ungulates.Characters from various fictional works are organized by medium. Outside strict biological classification, [a] the term "pachyderm" is commonly used to describe elephants, rhinoceroses, tapirs, and hippopotamuses; this list also includes extinct mammals such as woolly mammoths, mastodons, etc.
Tapiroidea is a superfamily of perissodactyls which includes the modern tapirs and their extinct relatives. Taxonomically, they are placed in suborder Ceratomorpha along with the rhino superfamily, Rhinocerotoidea.The first members of Tapiroidea appeared during the Early Eocene, 55 million years ago, and were present in North America and Asia during the Eocene.
The samples were collected from two rhinos that were less than 2 years old, two that were between 3 and 7 years old, two adult rhinos that had given birth at the zoo, and two that had been unable to.
] Outside strict biological classification, the related term pachyderm is commonly used to describe elephants, rhinoceroses, hippopotamuses and tapirs. Cuvier himself defined Pachydermata as "animals with hoofs, non ruminants", whereas Storr had described it as "mammals with hoofs with more than two toes".
Articles relating to the Ceratomorpha, consisting of tapirs and rhinos plus their extinct members (Tapiroidea and Rhinocerotoidea). Subcategories This category has the following 2 subcategories, out of 2 total.