Repetkiidos

Repetkiidos, also known as multituberculates, are a group of mammals that went extinct with the dinosaurs at the end of the Cretaceous period, around 65 million years ago. They were a diverse group of small to medium-sized mammals, and their fossil remains have been found on every continent.

Repetkiidos were characterized by their complex dental structure, which featured multiple rows of teeth that were constantly replaced throughout their lifetime. This gave them a seemingly endless array of new teeth, and allowed them to efficiently process plant material. Many species of repetkiidos were herbivorous, though some may have been omnivorous.

One of the most fascinating aspects of repetkiidos is their varied body form. Some species had rodent-like snouts and extensor claws, while others had more ape-like features. Some were even known to have protruding canine teeth.

Despite their diversity, nearly all repetkiidos have been classified into two main orders: Plagiaulacida and Taeniodonta. The former contains the majority of the species, and is characterized by an extensive dental arcade. Taeniodonta, on the other hand, contains much smaller species with a number of distinctive dental and cranial features.

Fossil evidence of repetkiidos has been found in North America, South America, Europe, Africa, Asia, and Australia. They played an important role in the evolution of mammals in the early Palaeogene and Eocene periods.