Coelodonta

Name meaning:

Hollow Tooth

Period of life:

3.7–0.014 million years ago

Period:

Quaternary period

Habitat:

Steppes

Taxonomy:

Mammals

Countries:

Neogene period Coelodonta | 3D Dinopedia

Hippocampus

Kelenken

Coelodonta (3.7–0.014 million years ago)

What does the name mean: “hollow tooth” (from the Greek words κοῖλος — “hollow” and ὀδούς — “tooth”).

One of the most famous animals of the Pleistocene and a typical representative of the “mammoth fauna” was the woolly rhinoceros (Coelodonta antiquitatis). It was distributed across the vast expanses of Eurasia, from Portugal to the Far East, inhabiting the immense cold steppes that at that time covered nearly half of Eurasia in front of the edge of the great glaciers. It was one of the largest and best cold-adapted mammals of its age. This massive animal reached a length of 3.5–4 meters, and sometimes up to 4.5 meters, while weighing around 2–3, and occasionally up to 3.5 tons. It was covered in thick reddish fur that protected it from the harsh conditions of the Ice Age. Beneath the outer coat lay a dense underfur. In addition, it possessed a thick layer of subcutaneous fat that provided extra insulation against the cold.

The woolly rhinoceros belonged to the extinct genus Coelodonta, which was closely related to modern rhinoceroses. It is known from numerous fossil discoveries, including complete skeletons and even nearly complete carcasses preserved in permafrost. These finds provide scientists with detailed information about its morphology and ecology.

The skull of the woolly rhinoceros was large and massive, with powerful jaws adapted for chewing coarse vegetation. Its teeth possessed high crowns, allowing efficient processing of tough grasses that formed the main part of its diet. The nostrils were positioned at the front of the snout, while the ears were short and rounded, reducing heat loss. The most characteristic feature of the woolly rhinoceros was its long, slightly curved horn, which reached up to 1.5 meters in length. Behind the first horn was a significantly shorter second horn. To support its extremely heavy horn-bearing head, the rhinoceros possessed a massive projection on the back of the skull and high vertebral spines between which enormous neck muscles stretched like steel cables.

The body of the woolly rhinoceros was stocky and massive, with thick limbs designed to support its great weight. The forelimbs and hindlimbs were approximately equal in length, providing stable locomotion. The tail was short and covered with fur, reducing heat loss.

Remains of the woolly rhinoceros have been discovered throughout Eurasia, from Great Britain to northeastern Asia. Particularly numerous finds have been made in Siberia, where permafrost preserved not only bones but also the soft tissues of these animals.

In addition to the best-known species — Coelodonta antiquitatis, or the “woolly rhinoceros” — the genus also includes three older relatives: Coelodonta nihowanensis, Coelodonta thibetana, and Coelodonta tologoijensis. The oldest of these was the Tibetan Coelodonta (Coelodonta thibetana), which appeared about 3.7 million years ago. It was distributed in Tibet, where, living at high altitudes, it probably developed the key cold-climate adaptations that later proved useful to its descendant during the glaciations.

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