Sajandites
Sajandites are a group of extinct mammals that lived during the Eocene epoch, approximately 56 to 34 million years ago. They are known from fossil remains found in Europe and Asia, with the majority of specimens coming from the Sajandalen Formation in Mongolia. Sajandites are characterized by their small size, typically ranging from 10 to 20 centimeters in length, and their unique dental structure. They had a single pair of upper incisors and a single pair of lower incisors, which were adapted for gnawing on plant material. Their molars were also adapted for grinding, indicating that they were likely herbivorous. Sajandites are believed to have been insectivorous or omnivorous, as their dental structure suggests they could have fed on a variety of food sources. They are classified within the order Insectivora, which includes modern-day mammals such as hedgehogs and shrews. Despite their small size, sajandites were an important part of the Eocene ecosystem, and their fossils provide valuable insights into the evolution of early mammals.