eutriconodonts
Eutriconodonts were an extinct order of mammals that lived during the Mesozoic Era, from the Jurassic to the early Cretaceous periods. They are characterized by their distinctive molar teeth, which featured three large cusps arranged in a line. This dental structure is a key feature used by paleontologists to classify them. Eutriconodonts were generally small, often no larger than a rat or weasel, and likely led nocturnal lives, foraging for insects, small vertebrates, and other invertebrates.
Fossil evidence of eutriconodonts has been found on several continents, including North America, Europe, and Asia,
Notable genera within the eutriconodont group include *Repenomamus*, one of the largest Mesozoic mammals discovered, and
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